Mercury 115 wont idle. Ask Your Own Boat Question.

Mercury 115 wont idle I am working on a friends MERCURY 115 that runs and idles poorly. when starting takes few tries and runs then when shut off has trouble restarting. Cleared the weeds and tried to start it, but it wont idle. I have a 2014 Mercury 115 4 stroke Model# 1115F23KD Serial#2B058876. The engine starts and runs good and has no issues shifting into forward or reverse. Tan. Recently replaced throttle position sensor (the warning light indicated TPS problem) that warning has gone but idle problem still exists. kotts323 Cadet. I have twin 2000 Mercury OptiMax 225-HP outboard engines with 600 hours. Mercury should be ashamed about this motor it sounds like its got a rod knockin. I have a few Evinrude and Johnson motors that I tinker around with, but I have never worked on a Mercury. P. I blew into hose 7 after removing from intake. I havent been fishing much, but always top off the fuel or just run around to keep gas fresh in it also add marine stabil. They run well at cruising speed and WOT. Set all idle screws to 1 3/4 turns out from lightly seated. Re: 1994 Mercury 115hp fast idle questions Appropriate parts were ordered from a very reputable service dealer in the area. I have mitigated it, but not eliminated it through Re: Mercury 115 no power BK, I have never found a case where the carb idle mixture was set too rich. It will rev. 1) Had the old foam style air filter, replaced with newer mesh style 2) Since it was fine at slow speed’s I Mercury & Mariner Outboards . It happens every time. ive been on this site searching for an answer but haven`t found one yet this thing is tricky lol um i guess what i`m trying to find out is if the stator could be the kulprat for the problem. racerone Gold Medal Contributor. First boat I have done some work on it before putting it on the water, no gage was working and steering cable was bad, plugs and gas filter was changed and I added 10 gallons of mix 50:1 to an existing 10 gallons. Mar 29, 2015 #1 I have a mercury 115 that I cant seem to get to idle. bcalfee Recruit. how to clean a carb for idle issues. pontoon said to have been rebuilt last year and tempermental to start. I went I have been trying to isolate an in gear idle stall on my 2005 Mercury 115 2 stroke outboard, the carbs and fuel pump were rebuilt and compression checked at 135 per cylinder by a boat shop but I still have an occassional stall when I put my motor into gear. When I first picked up this outboard and the 1990 astro craft it is on the back of it wouldn't start. 7K views 4 replies 3 participants last post by Crutty May 20, 2015. It is an inline four cylinder and has the two carbs with no idle jets and two with idle jets. Yes it's had light use and that could be a concern too, but it has been well cared for. duckman2314 New member. It doesn’t seem to make a difference whether I’m shifting from forward or reverse into neutral. I know they aren't the greatest with fuel economy anyway but it has gotten really bad since this issue Idle charge battery-management technology automatically increases idle rpm to boost alternator output and recharge low batteries. To properly adjust the carbur. next motor won't be a Mercury. So before I took to the water I changed the fuel filter even though the last filter Re: 98 Mercury 115 hp starter, battery, solenoid, issues. Apart from the idleing problem engine works great. B. So, keep reading. It will start and Idle but when I have the water running to it through the "ears" it dies. Joey Rodgers New member. Previous to being idle for so long I was meticulous in maintaining my engine ie: new filters every year, fuel treatment at every fill up, spark plugs changed every other year, etc. I have changed plugs, fuel, fuel filter I have pulled off fuel rail and checked the injectors and everything is in working condition. Expert. Those pics I fired up the motor just forward enough to hold idle, than died. Jump to Latest 3. The impeller will pump harder submerged than on a hose. The plate in the throttle body should be fully closed at idle. (and optionally a descaling solution) directly into the intake. When the throttle is in the idle position the carbs should be fully closed and the ignition retarded. However, like any mechanical device, it is not immune to issues. Mercury 115 4 Stroke- Bogging Down? Jump to Latest 41 - 60 of 133 Posts. mtsaz Cadet. 9 4-stroke pro-kicker wont idle, dies if running lower than 1/2 throttle? Nothing different, 2015, Idle on mercury 2004 115 hp outboard saltwater how to adjust. when it was getting water it was more of a light grey, or silver color. It will start when I put it in neutral and give it gas but when I back off throttle it dies. if one of the 2 cyls it idles on has problem it wont idle on one cly. HI I have a 2007 optimax with very low hours. have to keep fast idle around 1500 rpms to keep motor running. 2005 Bass Tracker Optimax 115 HP Won't Start. However, even this beast faces problems after being used for an extensive period of time. Pro XS outboards won’t wear you out on long runs to faraway fishing holes. This engine has never idled that well, but previously, as soon as it starts if I apply some throttle it is good to go. . Not sure. Adjust each carb to best idle + 1/8 to 1/4 turn, ideally, adjust out on the water a blade width at a time each, just until any throttle hesitation is gone. 5 HP 4 Stroke idles but won't accelerate Any luck with this problem? I am having the same problem with no relief. Parts Lookup Service manual P/N: 90-830234R04 1996 Merc. - It's been idle (stored) for the last 3 months. I use. Rev it up good and try to clear it. Crutty Discussion starter. Fuel pressure is good - 120 The Boating Forum - 2004 Mercury 115 4 Stroke EFI Problems - Im at a loss and hope someone here can help. Or try tapping the choke while attempting to throttle up. The high pressure water pump was replaced three years ago and has less than 50 hours on it. 2014 115 fuel injection won't idle down, sits at about 2400 in neutral, No it just won't idle down, I'm looking at the I have a mercury 115 four stroke that wont accelerate and. R. 5. After another couple hours of testing, the dealer tells me that the level has been steady. Have a 1988 Mariner 115HP 2+2 and decided to change the plugs as at idle it was running rough. It seems that the rpm at idle supports the engine but if I let it idle 2013 115 with only 200 hours. Has anyone considered replacing the two lower carbs (3 and 4) with carbs that have idle adjusting jets, like carbs 1 and 2 ? 2006 Mercury optimax idle issue Hi everyone, I have and optimax, on first start it does. When I first go out and run, for any length of time, the engine runs fineright up until I throttle down. - Stored w/Stabil and ran dry. Mtsaz Member. I have a 2008 115hp 4 stroke EFI that will not start. Paul), and all said link/sync was good and that these motors just run cold-blooded. When the RPMs get up around 1800-2000 it runs well. Jan 4, 2009 #1 "I purchased a used boat last "I purchased a used boat last I've got a 2 stroke merc 115hp inline (mid-70's) on the back of my houseboat. Re: 2005 Mercury 115 EFI 4 Stroke won't start studying fuel injection problems on mercury EFI 4 stroke and found your posting. I can start it back up with no problems and once I quickly push the throttle to get the rpm's up a little bit, the motor runs just fine. 2003 Mercury 115 hp 4 stroke turns over but wont fire . Pressure should remain steady from idle to WOT while under load. I've had this engine now for a month and it has 12-hrs. with a fuel module there is a vent to the intake manifold. I have cleaned and cleared every part of the carb. Thread starter mtsaz; Start date Nov 29, 2018; M. Joined Apr 29, 2018 Messages 18. Hello everyone I have a 1982 mercury 115 hp and its starting to get the better of me, it starts up fine and idles like a clock but the moment I put her in gear under a load she will not go faster than 8- 10 mph, I've rebuild the carbs and had the sync but she still does the same thing I very frustrated please any help will be greatly appreciated 94' Yamaha 115 2 stroke won't idle 08-23-2011, 11:17 PM. The dealer checked it out spring 2013 and found no codes. the botom two are just along for the ride until the throttle is opened, then the bottom carbs start passing enough gas for them to mercury optimax idle issue. 52 posts · Joined 2013 Add to quote; Only show this user #1 · May 16, 2015. Happened to us right when we bought the boat, and it was right back near the bundle of cables and tubing. The repair is very simple if you have a few hours to commit to the job. if i go through this starting I have a 115 optimax 2004 (DFI) run rough at Idle, Checked fuel pressure reading 30psi should be reading 88 psi to 92 psi, clean water sapartor out found, parts of old fuel line in chamber where filter is clean filter and chamber, looked at Re: 98 Mercury 115 hp starter, battery, solenoid, issues. The dealer told me to vary the revs the first 10-hrs which I did. The engine has exactly 130# compression on all cylinders and runs the boat 48 GPS MPH at 5000 RPM with a 22 in Turbo 2 prop and idles smoothly, so I think it is a solid engine overall. not sure if your 87 115 is a 4 cly or not but just something to google for info to see if yours has any dumb fuel saving ideas that suck I have an 05 mercury 115 four stroke that wont start or idle. Removing Idle Stabilizer and new timing specs 115. Now the exact opposite. It hasn't idled from the get go. Let me provide you with all the facts. 2011. 115 optimax idle issue. Noel Schembri. Others require an adjustment directly on the carburetor. My Mercury 40hp 2 stroke (2001) won't stay idling and I really need an advice as to what could be wrong with it. In some models, setting the idle while the motor is in neutral will allow it to idle in neutral, but not hold an idle while engaged. 2007 Mercury 115 EFI Rough Idle Problems. Jason. However, if you’re still stuck in the same problem, then there is a good chance that you’ll need to purchase a new fuel pump. Thread starter Joey Rodgers; Start date Mar 29, 2015; J. the motor wont pee until the thermostats open,120-*140* water temp. 33,725 Satisfied Customers. Customer: 1996 115 mercury starts great but wont idle down idle screw backed all way out all factory set no one has ever touched the engine except plugs checked linkage seems ok. Mercury outboard motors Nissan outboard motors Suzuki outboard motors Tohatsu outboard motors Yamaha outboard motors . I would try to submerge the foot and run engine. When I run it in idle in the lake it also runs fine. The compression readings aren't perfect: the lowest reading was 103psi in one of the cylinders when measured about 2 years ago (the engine hasn't done more than 25 hours since then) but I don't longer have the readings in the other 2, I think they were around 110psi, so will have to re-measure them all now. Runs fine except for the inherent problem of rough idling below 2000 RPM. Sometimes it will go right in smoothly and other times I have to use 2 hands and really pull on it to get it into neutral. Re: Mercury 115 2+2 How smooth should this idle? Many owners of the 115 2+2 do not relize the motor only idles on the top two cyls. After fishing this morning i I got a 2008 Pontoon from my ailing uncle. 115-will Not Go Over 4000 Rpm I also have this same problem with revs on my 2007 115 4-stroke. Joined May 7, 2011 Messages 1. Have mercury 115 hp 4-stroke idle rough then dies, will run on top at no problem. - Yesterday (03/16/2011) was first start up. US Navy (Ret) Certified Mercury Marine Tech with over a decade of repair experience. May 7, 2011 #9 Re: Mercury 3. We restarted and it kept doing it. After 600 dollars at the local dealer the enginestill runs the same. When the boat was used for the second or third time the motor would idle between 8 and 9 hundred rpms. View Profile View Forum Posts Private Message Member Join Date Jun 2013 Location LONGVIEW TEXAS Mercury Mariner Outboard Forum . Jan 20, 2012 #1 Re: 1986 Mercury 115 "Tower of Power" Reed Valve Problem "Lower unit timing" - now I've heard everything :facepalm: . At idle 2 cylinders would recieve gas and the other 2 cylinders carbs did not have idle ports so they would How to adjust idle speed or tweak carburetor on Mercury four-stroke 15 20 horsepower outboard engines 2008 2009 2010 2011 2012. Thread starter Mtsaz; Start date May 25, 2019; M. Idle on mercury 2004 115 hp outboard saltwater how to adjust. Thread starter kotts323; Start date Jul 29, 2014; K. I guess the other question is when you say, on the hose are you talking about with muffs on the foot or a connection on the motor. Gas and diesel marine have not made any carb adjustments, do not know what idle rpm is now because it wont idle unless idle speed lever is forward 50 percent. motor will start with choke on, off once started. 1986 115 HP Inline 6 cyl - low idle issues . jpg. I changed spark plugs I bought a 97 Triton tr17 with a 1997 Mercury 115 ELPTO (serial number: 0G52****) motor on it about a month ago and I'm having an issue where it doesn't want to rev up over 2500 RPMs. Let the cleaner seep down and soak around the tabs, then blow out. The carbs all have quick disconnect ball fittings that just pop off without having to adjust or move anything out of the ordinary. My question , is the engine supposed to idle on2 cylinders and then kick in on all 4 when you FIXED my rough Idle + stall problem 900 -2000 RPM running hot 60HP EFI Mercury Outboard 2005 Four stroke engine! The engine starts fine and after runing for Mercury directed the dealer to change the oil and filter again but install 25W40 instead of 10W30. There is no reduction in perfomance or fuel economy. Marine Mechanic: Jason. Ignition problem. It seems to happen at every trip. Recently [the following were] replaced: the fuel rails (with new fuel injectors), spark plugs, fuel filters, new mechanical fuel pump The common problems with mercury 115 four stroke are stalling and rough idling, fuel contamination, and overheating. Put it on the lake and made several fast laps and then went to idle zone. After being stored for an extended period of time, I had the opportunity to get the boat out. This could be caused by a I just bought a boat with 1997 Mercury 115 ELPTO(with Tracker decals). in the idle zone the boat started sputtering and then it died. Here is a seldom talked about solution to an outboard engine that is hard to start and idles poorly. Checked the plug, replaced gas and even tried talking How to adjust idle screws on Mercury 75, 90, 100, 115 and 125 horsepower outboard motors. when i first bought the boat and motor. The pics are after I replaced gaskets. HI- out of the blue my optimax 115 stopped idling and would stall, and idle rough. We ran the 2006 Mercury 115 EFI outboard on the cuff and it ran great. There are no codes, everything is in good shape- and up to specs- but it wont idle. Re: Mercury 2. 40 years experience, Safe boating instruct. My mercury 150 optimax is rough at idle, but once it has been out a run the idle is ok. 1 3 of 7 4500 rpm’s perfect. I completed the repair on my mercury and it was exactly as expected. Thread starter ec256guy; Start date Aug 31, 2012; E. The good news is that the outboard actually runs, so the problem shouldn’t be hard Topic: 2001 Mercury 115 FOURSTROKE EFI Idle Adjustment: rired: posted 06-02-2008 11:26 AM ET (US) I took a follow-up look through the SELOC manual for the 2001-2004 Mercury 115 4-strokes. Have noticed at low idle speed it doesn't seem to run smooth. " Depending on the year of your 115 Merc, there are a couple of solutions to your hesitation. 5hp 4-stroke New, Wont Idle. Coughs sputters and dies and sounds like a small motor does when its warm and you pull the choke. Joined Sep 22, 2006 Messages 7,474. I was able to do a little testing today. The 2005-2006 should be similar, but are not covered by my manual. Thread starter darlington_john; Start date Jan 4, 2009; D. and i feel like ive done a pretty thorough inspection of all the vaccuum lines. So we/I have it narrowed down to fuel float, mechanic from my video says rev limiter. If a Mercury 115 2-stroke outboard engine is not running on #4 cylinder, this can indicate several potential issues. There is no traditional choke on these motors, just the enrichening circuit. It is acting like an old carbed engine that is loading up on fuel, it smokes heavily and is drinking fuel. the problem is, when the motor starts is will idle and when put into gear it just dies and will take about 15-20 rest before it will restart. He changed the thermostat and it's purring like a kitten. These were a few common issues you can expect with a Mercury 4-stroke EFI outboard. SN 3B075497 2021/Mercury/115 Pro xs Tempest 24 5300 max RPM Vessel View mobile Question for Don, My New 2021 Mercury 115 pro xs high idle SN 3B075497 2021/Mercury/115 Pro xs Tempest 24 5300 max RPM surges like a misfire at idle Won't reach WOT over 5300 Hi I got an 05 merc 115 4 stroke, I bought this spring did all the fluid and plug changes ran good but seems now to have a rough idle when just in gear at slowest speed? Is there any fuel filters or anything on these are what Else could it be, run fine otherwise. *****Boat and Motor information: 2008 Nitro Z591 18’ Bass Boat Motor: 2007 115 HP Mercury Optimax DFI 2-stroke Serial # 1B482113 115ELPTO Original Issue: After winter storage with fuel stabilizer and battery charger plugged in, engine ran roughly and would not idle correctly (stalling) or go over 5000 rpm. Inboard & Sterndrive Engines idles like a dream, but wont accelerate. Come join the i just bought a 18 foot seasport center console. Mechanic's Assistant: Sometimes things that you think will be really complicated end up being easy to fix. Aug 31, 2012 #1 I'm a complete newb, first boat. Here are some of the most common ones: Fuel delivery problem. I suspect the air pressure regulator and am not keen to be pillaged by mercury for a new rail. ec256guy Recruit. Captain Nick. I have a 2012 mercury 4 stroke 115 hp. Ran a whole can of Merc Engine Tuner through the carbs. also dont know what proper idle rpm is suppose I have a 2006 Merc 115 hp 4-stroke on a Lund 1700 Explorer with 40hrs on it that died and now won't start? First, this motor is maintained regularly with oil changes each season and lube, water pump, etc. The motor has always rattled while idling in reverse, but would stop rattling and work in reverse after giving it more throttle. Mercury 115 four stroke is a reliable and efficient outboard motor for boats. Charles. Purchased a boat from an individual who said boat ran fine. Clean the center plunger with carb cleaner. With a little bit of troubleshooting and some Re: Mercury 115 EFI bogging down There is a fitting on the fuel line to the injectors to attach a pressure gauge. 2006 mercury 115 optimax bought boat sat up for a while change fuel bulb hose to vst cleaned and changed vst filter very. which won't hurt regardless. S Mercury & Mariner Outboards . The idle rpms are 850-900 and the in gear rpms are around 650-700 which is in spec for the engine. The moment I put it in gear it dies. HELP it wont even start no 2+2 means the motor is designed to idle on only 2 cylinders and the other 2 kick in when the rpm increases. It would go up to 2,000 RPM the first three minutes after launching and then would not go any further than idle speed. None ethanol marine fuel. It runs fine at WOT - no power loss or surges at all. Share this conversation. The bogging sounds like lack of fuel. From my research, I believe this is a 1974 model. Try and notice when throttling back down towards idle if you see a screw that prevents it from going down any further. In this blog post, we Re: 200 Mercury EFI does not idle Thanks for the advice. Both run rough at idle in neutral, and will eventually stall, unless I increase the engine speed. If you take proper I have a 2002 225 EFI Serial Number OT555274 that has developed an idling issue. Faulty Idle Bleed Recirculation System: Usually, a clogged or stuck check valve, or clogged or leaking hose. is work great on the test run on the water, but now its doesnt want to run. It has a 2007 Mercury 115 4 Stroke. im Working on an 87 115 inline six the motors been rebuilt. I have a mercury 115 pro xs Re: Newbie with Mercury 115 problemsIgnition switch and no spark My guess is the rectifier is shorted and/or stator problem for the no spark with the rectifier hooked up. Fouled, or improperly gapped Spark Plugs: Causes misfiring at low RPM, where the Ignition strength is at its weakest = Rough Idle. Re: 2002 Merc. any help would be appreciated. May 25, 2019 into the grand canyon---you will know why. Outboard Guy Certified Mercury Outboard Tech. Mercury 115 and 150hp Some simply have an adjustable screw that will set the idle higher or lower. I changed the fuel filters and rebuilt the accelerator pump. Re:02 Yamaha f115 tlra 4 stroke rough idle and stall IAC on my Yamaha powerhead Merc 115. My understanding is that for certain years, four cylinder Mercs had '2+2' feature, that is they ran on two cylinders below a certain rpms and on all four above. - Basically it won't idle, and anything below approximately 2000 rpm will result in it stalling unexpectedly (in gear or out). However, like any other motor, it can develop problems over time. The water should flow out of the tell-tale and other exhaust ports. Reply. Have a 115 4stroke yahama and it runs with less nosie than the merc 3. Advanced technical diploma. 50 hp mercury 1992 on just purchased used 20 ft. Ask for help, 24/7. Then, with the motor running at about 1200 rpm, the voltage should continue to increase to a Update. replaced fuel line bulb and fuel tank new. net, John will show you where to start if your outboard dies when it RE: Mercury 115 stalls when put to idle in neutral Do a double check to make sure there are no kinks in the fuel line. 2014 and have put on about 100 hours (around 20 hours annually) after injector cleaning, new spark plugs, thermostat, in-line Racor 120-10 My 2002 Merc 115 ELPTO (0T464942) is giving me low-end rpm problems while running below around 1300 rpm down to idle. Mercuyry Optimax 115 works with interference at idle. The Marine Mechanic I'm going to connect you with knows all the tricks and shortcuts. 110 and 115 for the two cylinders respectively Idle problems are very difficult to troubleshoot since they require your fuel system to essentially be perfect. This method won't be as effective as running the engine but can help flush out loose debris or salt. Run less than 5 min then cut off idle need to be adjust. darlington_john Member. Will cause rough running, especially at idle. Thanks John, I saw the blow up diagram and there is no thermostat, so thats not the prob. Thermostat was causing rough idle. My problem is when I accelerate it bogs down for a few minutes then it starts running at full power. 20. I have a hard time believing this entire thing was bad gas but I’m hoping it’s true! I won’t have a chance to get her in the water until Thursday evening but I’m keeping my fingers crossed. The boat and motor were bought new last Sept. I like to give each idle circuit a final spray of canned carb Mine is a 1996 Mercury 115 2+2 with the oil injector system removed. Re: Mercury 115 4-stroke idle problems Alan, Welcome aboard. This could be caused by a dirty air filter, a restricted air intake hose, or a faulty fuel injector. What happens is that folks tune the mixture to achieve highest idle RPM. 40 yrs. Show Less. Gas and diesel marine mechanic. HELP it wont even start no Your s/n comes up as: MERCURY - (115 H. Second Opinion] 9. there is also a vent on the rear,lower part of the mid that wont allow the motor to build up water pressure if its exposed,thats why it pees when in the lake,the vents are submerged. wont idle. I’m new on this site and this issue might have been addressed in the past, however here we go. Brought to 3 separate mechanics over the last 5 years, 2 were Merc techs in the Twin Cities (Mpls/St. I am not a marine engine mechanic but this is a fix that I have a 1996 115hp mercury tracker motor. I have seen this problem with the fuel line cause all kinds of problems from what you are describing to an amperage over draw warning. Mercury 115 2 Stroke Not Running on 4 Cylinder. Thread starter darlington_john; Start date Jan 4, 2009; D 2004 115 4stroke EFI Bogging on Acceleration. pump bulb, will not stay primed. When I go back down to very low rpm's or idling, the motor stalls out. These instructions are based on factory idle adjustment procedures. i know this sounds stupid but that is what manuel states. After talking to the dealer, it appears that Mercury does not know what is causing this problem (or won't admit to knowing). Had a mechanic go through it - carb kits, new fuel lines, filters I just purchase a 1987 mercury 115 hp 6 cyl. i just recived the boat this week so i havent really had a chance to dig into it to see what might Hello All, I have a 1990 115 Mercury outboard motor on an 18ft wellcraft that starts and runs great. the engine won`t idle below a 1000 rpm i`ve done all the carburator adjustments that can be done plus rebuilt,new switch boxes all First off, this is a 1996 Mercury 115 ELPTO. 90 hp. Two weeks ago, I was seeing around 4000 RPM and now, I'm only seeing about 3800 RPM. It idle's beautifully, revs up in neutral, but when you give it full throttle in gear, it winds up for about 15 seconds and then just dies down to a sputter, occaisionally it will completely die and won't start back up for a while (almost like its vapor locked). If it shows any signs of being slightly open, then check your throttle cable adjustment. this is a carburetor related video. Help!! I am not sure if this is still going: I have one of these and have cleaned I just purchase a 98 RENKEN 1880 with a 115 Johnson. About 5 min. I can run her at around 1200 rpm but she runs rough and is Mercury Mariner Outboard Forum . 1986 25 HP XD mercury 2 stroke outboard. Drives perfect thanks any ideas JOE54. Have had carbs cleaned new plugs new fuel and compression checked not sure as to what else it could be. Chat is completed Does the engine seem to idle fine but just not have the power at top end or are you hearing a miss at idle? My buddy has an 86 115 merc, runs on idle "barely" but completely 2200 rpms. My brother bought it in 2007 and passed away a month later- and its been sitting (getting annual service/occasional startup) while his estate dragged thru probate. It isn't bogging down and dying. Remove all plugs except #1, hook a timing light to #1. 5 KB · Views: 50 j_martin Admiral. Customer: I have an 05 mercury 115 four stroke that wont start or idle. Walleye Message Central > Boats, Motors, Electronics and Trailers > When the engine is at idle, the voltage should be a 1/2 to 1 volt above the previous measurement with the motor not running. What do you check when your outboard idles and then dies? In this short video from Boats. It doesn't shake or anything once it reaches 2500rpm and it idles good so I think it's just running on the top 2 Customer: I have a 115hp Mercury 4-stroke motor that runs rough at low RPM, won't idle and appears like it is running too rich. Take off the cowling and with the engine off move the throttle back and forth. Show More. Answered in Troubleshooting Mercury Optimax 115 Problems to Know: The Mercury Optimax 115 is a direct fuel injection (DFI) outboard in the 115 hp range. "The engine overheated due to "The engine overheated due to weed obstruction in the water intake and it shut off. In those models, you must set the idle while the motor is engaged. Suzuki dt 115 efi '98 stalling at idle and won't start unless shift into gear immediately or hold open throttle plate. I have a 1989 90hp 2 stroke Mercury that idles fine, but stalls after Re: Mercury 115 rough idle and missing 1982 inline 6 Won't be able to run motor for a few days, so will try to make a DVA tester. - 8 years experience. Joined Aug 31, 2012 Messages 2. We replaced the fuel lines, fuel, impellar and oil; that got her to start up but she wont idle. I have a 2011 mercury 115 HP four stroke serial number 1B843908 Started with having problems with bogging down at speed. The serial # 25 HP Mercury XD Wont Idle. 2012. This could be caused by a clogged fuel filter, a faulty fuel pump, or a restricted fuel line. Re: 98 Mercury 115 hp starter, battery, solenoid, issues. checked. This has helped my idle over the how to fix an outboard that won't idle. A de-carb using Seafoam, Yamaha Ring-Free, OMC Carbon Guard, Chevron Techron etc would clean up the innards real good and ensure the rings aren't sticking from carbon issues. Any ideas would be appreciated. 2008 115HP Optimax Idle problems He has a 2008 115Hp Optimax Pro that wont idle. The boat recently developed a high idle 1300-1500, now seems to be staying Re: Adjusting idle on EFI 4 stroke Hello Bensonr and :welcome: to iBoats. I have a honda snowblower HS622. The 115 four cylinder employs what is sometimes referred to as a 2+2 system. The engine starts and runs fine with a little throttle, at about 1000 RPM. Now the mixture is too lean to allow acceleration. -At idle-Under Acceleration-5/10/15 seconds after An outboard motor that won’t idle properly can be a real headache, especially when mooring with an engine that stalls every time you bump it into neutral. <br /> This should be sincronized or your motor will not run properly also make sure your points are clean and gapped, replace condencer as it Re: 1985 35hp mercury wont idle, or run in gear. i have recently replaced all the gaskets in the carb. This is an update for an old problem i have never managed to solve. I replaced both of the in-line fuel filters. If that were to happen the motor would not idle, or at least would not idle for very long (few seconds). Just check to make sure it is. Ask Your Own Boat Question. I cleaned the TPS as this apparently can be an issue- no change. After I come down to idle or neutral, it starts running rough. It starts fine and will idle for about 20 seconds, then die. Could not get idle below 6 BTDC. Check your fuel line from the tank to the engine. Ted G. 80 JET (4 CYLINDER) - Mercury, Mercruiser, Force, etc. When I try to throttle back up, it's - I've got a 2005 Mercury manual start 15hp 4 stroke kicker, that started acting up yesterday. Hi Guys, I have a 115 2+2 serial 0T133863 on a Nitro LX 700. It runs great as long as i don't want to scream across the lake, which I do! Mercury 115 won't accelerate when advancing control handle control [Re [Archive] Mercury 115 EFI - Not Charging?? Boats. 4,507 Satisfied Customers. It was running well until If you’re lucky, you won’t have to buy any replacement components, and the issue will be fixed at this stage. I would - change the sparkplugs (they are cheap), get Re: Root cause of Mercury 2-strokes' rough idle) true. carbs were rebuilt. Should have several more yrs and hundreds of hours left. Ensure there’s good water flow. but when put in gear it stalls. 137. Whats going on? E. Spark jump was checked, ok on all cylinders. any help is highly appreciated. It would troll all day long but sometimes and only sometimes at increased speed it just does not want to go. This engine Stalls on idle. Then follow the narritive. I've see two circuits on the forum is there a particular one to use for the mercury outboards? Also looking at replacing all the HT leads as they're old and it will only cost $40 for the lot. One thing I did find is that when you bring the motor to idle and let it "cool"down (considering I run it around 3800rpm), the problem Your question was - On a 115 2+2 Merc, idles pretty good but won't run under load. (1994 )) Serial No: 0G100998 Model No: 1115412PT Parts List for model 1115412PT: 100/115/125 H. Joined Apr 16, 2013 Messages 9. It's ok to soak hard metal partswon't hurt them. Jump to Latest the car starts up just fine, but it will idle (high) for a few seconds and then die. More or less by accident I discovered that the quick disconnect at the motor was worn and allowing the fuel pump to suck air. This is a stop screw which controls your idle. At idle the motor dies. Hardest getting it into reverse but it can be done. I have a mercury optimax 200 year 2006. Turn out the idle mixture a couple turns and see if it helps. If anything, the answer about idle adjustment is a little less clear now than it was I have a 115 mercury that wont idle it wii run if you keep hit choke change lines from tank and fuel pump bubble gets hard what is the check vavle before the fuel pump do no gas in it. To diagnose and fix the issue, it’s essential to identify the root cause and take the proper steps to solve the problem. I am running Don's Cocktail with A rough idle on your Mercury outboard engine could be caused by several factors, from dirty fuel to worn spark plugs to an issue with the carburetor or engine compression. Idle speed is controlled by the ECM and the Idle Air Control valve. Any suggestions ???" 115 hp 2006 merc 2000 225dfi:OT136131. , Failure Analysis, Expert Witness Certified Mercury Outboard Tech. if i drop fast idle and put into gear quickly it will stay running but if i give it any more throttle than 1500 rpm it floods out and dies. Follow the directions for the carb cleaning solution. the motor will idle perfect if you have since turned the motor off and Still struggling to start and idle and when it does it sputters and surges up to 100 rpm . Re: 6hp mercury wont idle help I know on larger mercs (like mine, 200hp). 64 Satisfied Customers. If pressure falls of at RPM then you will need further testing and inspection of booth fuel pumps, fittings, and hoses. experience with complete engine repairs both inboard/outboard and MerCruiser Certified Technician. HELP it wont even start no The ignition system has a minimum cranking speed of 300 RPM or the stator will not generate sufficient voltage to fire the spark plugs. Nov 29, 2018 #1 HI- out of the blue my optimax 115 stopped idling and would stall, and idle rough. Restarts quickly, also on first start if I put it in gear it stalls, but also restarts quickly. Answered by Charles in 16 mins 11 years ago. 9 KB · Views: 50 Timing Adjustment_3. air. The Mercury Optimax 115 is a popular outboard motor that is known for its reliability, fuel efficiency, and outstanding performance. still stalls. It will rev up to 5500 rpm's when in neutral out of water. Sounded Very bad on the Throttle and Idle. A friend of mine has asked me to see if I can fix this 20hp Mercury. Charles, I'd doubt if you are online, I won't be very long myself. Blow dry w/100 psi comp. No Idle - 1989 Mercury Inline 6 115hp The compression is a bit over the map, and it could be due to a little extra carbon buildup from the 'leaky' carbs. Problem has started about 5 years ago below you will find all things we have tried to solve the problem but till today with no success. If it is the gray small diameter fuel line and it is old, chances are the inside has collapsed. Start your engine and let it run at idle. Jul 14, 2010 The idle stablizer only works at idle, if rpm's fall below a set limit(550rpm) it will attempt to raise rpm by advancing If the adjustment is correct: Get the engine in to your local (Authorized) Mercury Dealer. serial # OG360865 The motor starts and idles fine, but in gear will not rev above 3000rpm. Great at anything above a low idle. It is a beast in the 115-hp range with a two-stroke engine. Re: 1996 Mercury 115 Wont Idle ??? Like Joe said, your 115 is a 2 + 2 motor, only the top two cyl's carbs have idle circuits and pass enough gas to fire at an idle. I have an 8hp Mercury 2 stroke outboard for my dinghy and it has generally been very good, but recently after having just filled the gas with 97 Premium (at Valero) and adding the appropriate oil, it is now not running. The engine runs great above 2000 RPM but rough below that because as you know, the lack of idling jets on the lower 2 carbs. 2007 115 Mercury outboard motor won’t get past 3000 rpm. seems some gas leaking from bottom of motor. It had been shrinkwrapped and so I did some tidying up, put some gas in the tank, and we went. I got the boat in may of this year. Where I have gone so far. It will start with top cowl on, but wont idle for even 1 minute before dying. Have heard about plugs having to be lined up but havent tried anything. Dual Mercury Master Technician- for Mercury Outboards, Mercruiser and Mercury Racing at European Marine in Greenville, SC. I reset the idle screws on the top 2 carbs and I’ve managed to get it running now but she’s pretty hard starting. 2004 115 4stroke EFI Bogging on Acceleration. I wouldn't give that "mechanic" another penny. The top 2 cylinder provide power at idle/just off idle (upto about 1800'ish rpms) then the second two cylinders kick in (that's a rather simplified explanation, but close enough). The only tools n Re: Mercury Outboard no pee hole discharge here is what I have done with all my merc engines, I take the "pee" fitting off the crowling and drill the hole out enough so the hose that went to the "pee" fitting sticks out of the crowling, since I've been doing this I've never had anything clog up the small "pee" fitting. According to a group of Mercury Pro XS outboard motor users, sometimes the motor gives a hard time by constantly sputtering or stalling on idle. My 2005 Mercury 115hp EFI starts acting strange. The older Merc 115 2 stroke versions ran at idle on 2 cylinders and switched to I was having some isues with my 20 hp Mercury and it turned out that it was sucking air and causing problems, my case it wouldn't idle, would be hard to start & finally it dies while backing up and would not restart. Have 2003 115 mercury 2 stroke when idle pull plug bottom wires no different in idle but when pull top 2 plug wires. How it works. It must move as the RPM's pick up to advaqnce the timming with the fuel and air. HELP it wont even start no You need to ground those sparkplugs to the engine! Otherwise they wont spark and it will also ruin the ignition if it happens for a long time as that voltage wants to There are a few possible causes for your outboard engine stalling at idle. It smokes quite a bit. Freshwater use (no sand) lakes history. tested electronics- coils input terminals, (reading across # and- Same problem with my 2007 Mercury 90ELPT 4S! I drained my fuel tank & filled it with non-ethanol. I think it helps clean cylinder valves on a 4 stroke but on a 2 stroke I haven't seen many reed valves with crystalization. Second opinion] 50hp merc 2 strokeEngine won't idle but will run with the fast idle lever up, bring it down and it dies. Idle mixture is critical, start at 1 and 1/2 turns out from lightly seated, start and warm up the motor securely tied to the dock. At any throttle level above idle it runs like a champ. Re: Mercury 90 HP 2-Stroke Rough Idle and accelaration Idle mixture on 2-strokes have to be a bit fatter than 4-strokes to allow just enough 'richness' for acceleration. I had a cracked intake Mercury 2002, 115 ELPT 4S, Serial# OT552866, Max RPM 5600 to 5800, best I can tell by gauge idles around 650 to 700 RPM, fuel injected 4 stroke 260 hours on motor, sent injectors to European Marine for service Dec. I have to constantly work the throttle to keep it going while trying to idle around. The result was a rougher idle and stalling. I recently changed the fuel filter (attached to front of motor), drained the gas tanks (one plastic and one alluminum), replaced the Re: Mercury 1150 (inline 6 115hp 1976) starting and power problems The Timming is prob a Mechanical advance and must move with the throttle. 115 Yamaha wont idle took the fuel filter out and see it wasn't pushed up into the housing bought a new one put it in. 98 mercury 115 2 stroke wont idle correctly runs fine on hose bib goes dead at low speed have replaced filters plugs etc runs a little better trimed up. Jul 29, 2014 #1 Bought the above motor last year. Air intake problem. The engine has a hard time building revs and at times dies at speed. It also does not run right at WOT only turns about 4000 RPM's on a good day. Hi Guys, just wondering if anyone has experienced engine problems after coming out of winter storage. Degree in Marine Technology. Engine still cuts off when I shift from “in gear” to neutral. My two cents is that it will help clean up gum in the fuel injector, but as far as the cylinders on a two stroke, it won't do much if anything. The whole rig is my first ever bass boat and I am liking it a lot, but have a lot to learn. It is the amount of retardation that determines your idle speed and is set later with the idle stop screw. I am beyond my knowledge at this point. My service manual says it could be, Faulty Direct injector, I have a 2003 Mercury 115 EFI outboard (s/n OT577928) that I have a hard time shifting into neutral. I’ve recently picked up a Mercury 115 2+2 whith the oil injection system removed. I have a 1979 Mercury 115hp Outboard which runs fine on the driveway in idle and in gear. it has a 86 115 mariner outboard that runs strong in forward but wont run in idle or reverse. I have a 2016 Optimax ProXS 115 and seem to be having the same issue. Rebuilt the carbs with I have a 2002 mercury classic 115 that does not want to idle. to redline in nuetral Compression checked out ok, 135-135-138 psi. if the muffs dont seal well,it doesnt pull much water. May 4, 2017 #2 Compression test must be done. can remove it and check fuel level ~2/3 up. It would surge up and down but ran fine otherwise. This is normally a cure for the problem of poor acceleration on these engines. Mercury & Mariner Outboards . When I put it in gear and take the pontoon boat out it will only rev up to 2500 rpm's. These issues can be resolved with basic troubleshooting and maintenance. I 2005 mercury 115 elpto (4 cyl, carb) has HIGH IDLE I have a 2005 nitro with a 115 on it, boats ran great for me purchased it used a over a year ago. It has been sitting for several years. Thread starter duckman2314; Start date Jan 20, 2012; D. Pull the top cowl and it idles perfectly for as long as I want. A forum community dedicated to Mercury Cougar owners and enthusiasts. 115, it frequently stalls when shifting between forward, reverse, and back to idle. Some mercury 115 pro xs users have claimed that sometimes the engine starts operating erratically all of a sudden. 5 . - 8 years experience I have a 03 Merc. It runs perfectly WOT. On the old six cylinder inline models, you may only have to adjust the idle mixture screws open (CCW) about a quarter turn to richen up the mixture. I have he exact same problem on my 2010 Optimax 115. It always performed flawlessly. 1986 115 HP Inline 6 cyl - low idle issues. Changed out fuel filters, new fuel, all new fuel lines, and spark plugs. Let’s have a look at 8 very common problems with the motor won’t get past 3000 RPM; In this article, I’ve explained all these Mercury 115 2 stroke Problems with proper solutions. I can pop it into forward, but then when I punch it, it won't respond and just continues at Idle speed. Have checked the gaps and wires. I run a 50:1 mix of synthetic outboard oil. 1990 Mercury 115 2+2 wont idle. I took it to a reliable marine mechanic and I water coming into 2 cylinders. olvf vfj vbmyfx riinv nlkluz wcckv pci fhivlh wlaok fjl