Mercury outboard leaking gas I found both electric fuel I would suspect that the gas is leaking into the lower pan and then running down the leg. Home; Troubleshooting Guides. Those Jun 26, 2003 · I'm just getting into small go-fast boats - A friend and I recently bought a 13' DUX hammerhead and an old 1975 merc 50 hp 4-cylinder outboard to go with it. The leak is only present when the bulb is primed. I think one of my carbs is leaking oil and gas. Customer: 2009 Mercury 20hp 4 stroke F20ML carburetor is leaking fuel out the bottom tube. Tell me a bit more about what's going on so the Marine Mechanic can help you best. Tell me a bit more about what's going on so the Marine Jul 12, 2021 · Mercury & Mariner Outboards . Inboard/Outboard mechanic Mercury/ Mercruiser, Volvo Penta and OMC, Johnson/Evin. JDusza Ensign. Jun 4, 2023 · Common Problems with Mercury 40 HP 2-Stroke Outboard Engines 1. Oct 24, 2007 · My trusty Tohatsu 3. Does anyone have a ideal what I need to do. Thread starter daniel_72; Start date Jul 14, 2007; D. Mar 5, 2011 #1 Hey guys The fuel is leaking from under the cover located below the cowling. IronOutlaw Seaman Apprentice. Be sure to use a kit from Merc as they contain new style check valves. I give the gas line a pump with the bulb but Gas Leak in 40 hp 2 stroke mercury outboard Try replacing all gas lines, would be a cheep fix if done yourself, while you are at it replace fuel filter. I tried cleaning the carb and replacing the float/needle valve but it did not help. It still runs ok but when I am fishing I kept seeing gas in the water behind my motor. How do I clean the carburetor in my Mercury 2 stroke outboard? Is your Mercury outboard motor leaking fuel? In this video I show you a very common source of fuel leakage in these motors and how to fix it. Jul 12, 2012 · Re: Why do Mercury outboards leak fuel? I hope the oring in the brand new gas line disconnect isn't bad. The top 2 carbs have idle screws Sep 16, 2019 · Good afternoon, I have a 05 Merc 2 stroke that has a slow leak of fuel that appears to be coming from the carb. 6 days ago · I have a 1989 Mercury 90 hp 6 cylinder outboard and I noticed clear oil dripping out of a small weep hole just below All Forum Categories Outboard Motor Repair Gas Inboard & Sterndrive Repair Diesel Inboard Repair Marine Transmission Repair Miscellaneous Engine Topics Is that the fill bung you say the oil is leaking from? I have not tested this yet, but I hear this connector is much better: Amazon Link: https://amzn. Jun 13, 2010 #1 I took my new 1983 ranger 330v Mercury 115 leaking fuel from float cover Thanks for the info man. I rebuilt the carb twice, the lines and filter replaced, rebuilt fuel pump, changed May 12, 2013 · Check the grounds under the coils. My "big" boat, a 1970's Cigarette 36, seems to take forever to fix everytime something breaks and I need something to run! So, running it in my garage in a trash can, the outboard starts nicely and runs but I can Jul 2, 2012 · Re: Mercury 90 fuel leak Update on the leak. It doesn't seem to be coming from the carbs but I can't say for sure. Ive cleaned both carbs and installes new needles and adjusted the floats, Ive changed the fuel pump, Ive removed the reed valves and checked for daylight, OK, checked the coils and CDI for a missfire using a timing light on each coil wire while I had someone else Aug 4, 2013 · Fuel is pouring out of the vent tube in the lower unit coming from the Vent assembly. The video shows how I replaced the fuel p Jan 30, 2004 · Mercury & Mariner Outboards . Just a bit. Mechanic's Assistant: Sometimes boat issues seem like they'll be really complicated, but end up being easy to fix. It will also run for a minute and then die. 1,122 Satisfied Customers. Ensure optimal performance for smooth marine experiences. Fuel-related Issues. Jan 9, 2018 · The Boating Forum - Gas line fitting leaking when priming - Hello, Anyone know why out of nowhere the 2-hole fitting on the end of my gas line that attaches to the 2 prongs on my outboard have starting leaking at the seal when I prime the gas with the bulb? It started suddenly one day. 2 days ago · Leaking fuel or the smell gasoline may indicate that the fuel line is swollen, cracked and/or leaking. I've determined the fuel is coming out of the lower plunger housing, what is causing this? Answered by Noel Schembri in Jul 23, 2022 · Final Words. Motor starts & runs great. Use it up and take that bottle and use it for water to dilute your fire ant spray. However, if you want to get right to the outboard 2 days ago · Hi everyone, I'm really reaching out with this post as I'm at a point with my 1988 Mercury 60HP 2 stroke (OB240262) whereby I feel I'm chasing my tail and every step I take seems to produce more questions than answers. An air leak in the fuel system will cause the engine to idle erratically or perform poorly. After a min or so it dies due to flooding I believe. So not a separate stand-alone pump assembly. If fuel is coming out of your carburetor like that the problem is going to be a worn out needle valve. My spark are verry wet and my carb leak fuel. M. mac Recruit. Pump primer bulb to “hard” and maintain pressure. Started first after engine was run then tilted forward for towing. Jul 22, 2021 #1 2006 60ELPTEFI 1B294476 Filled my fuel tank and my vapor separator started leaking May 10, 2017 · Mercury & Mariner Outboards . Lgm88 New member. My 60 HP 4-stroke EFI Mercury Outboard is currently spitting gas via the VST. If you unhook the fuel line and trim the motor all the way up and let it sit like that for a min then put it back down it fires back up and will run just off idle without dying, but it is still dripping fuel out of the intake Dec 27, 2007 · A reed valve is a path for the fuel to flow down til it enters the crankcase. Skip to content. One of the most common problems with outboard engines, including the Mercury 40 HP 2-stroke, is fuel-related issues. Joined 26 Feb 2010 Messages * Use a good additive, like Merc Store-and-Start anytime the fuel is likely to last more than a month. Jul 22, 2019 · Outboard Mercury leaking fuel via VST overflow . Mercury Classic 50 Can someone tell me why when I run my newly acquired classic 50 Mercury motor, fuel will spill out of the port side of the air intake on the lower carb. In this video we Mar 31, 2025 · If you are geting leakage with If you are geting leakage with the motor down like that then yes your carbs should be rebuilt using new gaskets and needle (there are no replaceable seats in those carbs). So, this brings us to the end of the article where we have seen the main symptoms are sputtering, overheating, and gas-guzzling. Customer: 2008 9. All Forum Categories Outboard Motor Repair Gas Inboard & Sterndrive Repair Diesel Inboard Repair Marine Transmission Repair The battery in my crystal ball is dead. I also notice a little dripping out of the intake now. I have never successfully worked on an engine other than to change the oil and help someone else who knew what they were doing. Joined Jun 27, 2009 Messages 44. Jun 3, 2021 · Hi, I have a Merc 115 hp 6 cylinder, commonly called the tower of power. I have rebuilt these Apr 9, 2013 · I'm trying to troubleshoot an issue I'm having with my 2001 25hp 2 stroke Mercury. MikeMason New member. I plug the line back in and try to prime and gas just keeps gushing out. Solutions. Apr 23, 2012 · Re: fuel leaking out of connector barb? All of the fuel connectors have a O ring to seal the fittings off and also a vavle built into them to shut off the fuel, and the ones shown and mercury fittings, and they do wear and replacments can be picked up at wal-mart of many other places. kidn1980 Member. It has 3 carbs and I'm experiencing a gas leak from a part on the motor. 5 lives in the lazarette and never leaks a drop. I Oct 17, 2022 · When installing a new fuel pump in the Mercury 60 hp, Make sure the pump seal isnt hitting the float! Thanks for watching! e mail mrswimmingbear@gmail. Do a compression Mar 5, 2011 · Mercury Mariner Outboard Forum . 6 days ago · Mercury Mariner Outboard Forum . G. Mechanic's Assistant: Sometimes things that you think will be really complicated end up being easy to fix. However, for the fuel dripping off the bottom of the bottom carb, the fix was to pull the carb off and I put some loctite on the jet plug that goes in from the bottom of the carb. I replaced the gasget for the on motor reservoir cap, but its still doing it, so I think I got it traced back to the vent tube. The outboard is much quieter due to its acoustic engineering. galamb Silver Medal Contributor. May 13, 2009 #1 "I just tried to start my moto "I just It starts OK but leaks fuel badly from a hole in the middle carb - see photo. It leaks from the carb, very little amounts, and rolls down the reeds and sits idle. The fuel is leak from the Customer: I have a 90hp mercury outboard and it is leaking gas out of the botton carb. don't think its hurting anything but its unsightly to walk around the back and have a blue puddle in 5 days ago · 90 hp 2005 mercury marine outboard. Even at wide-open throttle and high speed, it delivers excellent fuel economy. Apr 18, 2020 · Hi. Bulb should not leak down Or pump fuel into the throat of the carbs Apr 24, 2025 · Two of the 3 carburetors are leaking gas on my 40ELPT, 4S, outboard (2000 year) motor. 1979 Mercury 115 hp fuel leak. I'm a long way into diagnosis and part replacements but need some opinions from fellow marine folk who know their way around an Apr 24, 2025 · Mercury Mariner Outboard Forum . Thread starter IronOutlaw; Start date Jun 13, 2010; I. ----Any pictures of this leak Mar 15, 2011 · I have a 67 model mercury 9. Mercury 115 leaking fuel from float cover. In the picture it is the one on the right with a hole in the back of it. I have a small amount of the fuel/oil mix coming out from the front of the cowl when I pump up May 10, 2017 · PROBLEM: I noticed there was always gas below the carb, and often times I would see gas on the water when I was attempting to start the motor. 5 days ago · I have a problem with my 1998 120 hp merc Force engine. I haven't seen the fuel coming down the whole throttle shaft since when I first posted about this issue. Jul 12, 2012 · Mercury outboards tend to leak fuel if the fuel lines are not disconnected after every use and the motor is tilted up in trailering position. Have a 1978 115 Mercury and connection of fuel line to engine leaks badly when I prime K. I pulled the gas line from the carb and the carb plug is just dripping lots of gas. Oct 4, 2015 · Upon close inspection there is no fuel leaking from the Sometimes a leaking powerhead gasket will cause this problem also but you will notice smoke coming from the front of the outboard On most O. I figured some of the strainers in the tank were clogged, so I opened it up and they were all clear. It has been stood upright empty all winter and now, with about 1 litre of fuel in it, it leaks all over the place when tilted towards the end with the controls. Aug 4, 2023 · 3. Jun 5, 2010 · The fuel is coming out of there. gas leaking out the top of my 75hp merc. com/en/u Feb 29, 2024 · hello, I have a 1995 mercury 150 EFI outboard that is leaking fuel from a check valve when we prime the ball. And yes the fuel pump should be rebuilt also. We believe you can now easily fix the issues by reckoning the symptoms. to/3qFq6L7 Attwood 8838US6Connector shown in video:Attwood 8 Apr 10, 2018 · Mercury outboard manuals Nissan outboard manuals Suzuki outboard manuals Tohatsu outboard manuals Yamaha outboard manuals . Specifically, I have a 2006 3 carb. Apr 11, 2018 Jul 23, 2022 · Besides checking the gas tank vent also, inspect whether the engine is primed and choked properly. Any ideas on Mercury & Mariner Outboards . enzoNC May 11, 2013 #1 Hello, i have a problem with my 1997 mercury outboard 60 hp 3 cycl. Carb was originally leaking out the overflows. hardwater fisherman Lieutenant Commander. Thread starter webeyh; Start date Jun 3, 2009; W. Jun 3, 2009 #1 The ball never gets fully tight and will not hold the pressure. If you turn the bottle upside down, with water in it, it will gurgle out at the rate that the air is replaced for the fluid that left. outboards it is not necessary to remove the powerhead to replace the reeds, unlike most earlier Mercury Outboards. Checking for Air Leaks in the Fuel Line: An air leak in the fuel line can disrupt the fuel supply and cause engine issues. 9hp Carb Leaks Gas When Primed . Drain the contaminated fuel, replace any damaged components, and use a fuel treatment product to absorb any remaining moisture. If your Mercury 20 HP 4-stroke engine is leaking oil, it could be due to a number of factors. Chris Souza New member. Inconsistent fuel flow or the use of stale fuel can result in the engine not running smoothly or losing power. Thread starter MikeMason; Start date Mar 5, 2011; M. Replacing the assembly is over $500, but replacing the o-rings takes about hal Mercury 50 Hp outboard with leaking fuelWe have gotten away from working on a lot of the older mercury outboards since many come in with all sorts of electri Oct 12, 2012 · Hello, 1999 Mercury 90 elpto. Fuel Leak on a Mercury Optimax 250 pro xs. not all of it but some. It has gas leaking from prop when i pump the bulb up and try to start it thats when it starts to leak. It doesn't leak when in operation Mar 11, 2024 · Hi All, Working on a Mercury 20 Outboard for a friend. Noticed gas on water. nothing. 2 days ago · Hi All, I have a 2007 Merc 115 EFI that I have recently pulled the powerhead and replaced the swivel pin, oil pump, impeller, and all the seals and gaskets (powerhead to adapter plate gasket, oil pump seals, impeller seals) as well as many other parts. In this case, you’ll need to replace the gasket to fix the issue. Thread starter hardwater fisherman; Start date Jul 12, 2021; H. and yes if its leaking fuel just sitting it will suck air and cause problems when the motor Apr 22, 2025 · Engine info: 2002 Mercury Outboard 25hp, 2 stroke, Model 1025201ZD Fuel pump: on this engine it is an integrated part of the carburetor assembly, attached to the side of it. The instant L6 torque on throttle powers your heavy offshore boat. The reeds can be bad and allow some blow back through the carb. Any suggestions on how to approach fixing the issue would be greatly appreciated. I was assuming that this May 30, 2023 · Water could enter your outboard’s fuel system due to contaminated fuel, a damaged fuel tank or lines, or a leaking fuel filter. It comes with superior power, splendid outboard design and the best fuel economy. Fuel leaks from small vent just above fuel bowl and from the carb throats. Running with the cover off and was noticing fuel coming back through the carb. A joint investigation by my dealer and the manufacturer was launched. what could i do to fix it. Fuel coming out of the top hole on middle carb i check the bowl seems to be the same as the others By chatting and providing Hello my name is ***** ***** I will be happy to help you out with your Mercury outboard. | Fuel System RepairWebsite to find your parts - https://www. Dec 13, 2023 · Swiftly troubleshoot Mercury 2-Stroke Outboard issues with expert tips. I thought it was water, but it was gas. I’m new to this forum,and new to rebuilding carbs,so I have a question I hope you all can help me with. is there anyway to stop this leakage or is it something that you live with on a direct injection engine like mine. I've now been passed on the river with a 7hp outboard with my 25hp at WOT. 6 days ago · After issues with my 2019 newly delivered Mercury Verado V8 250hp outboards leaking oil, crankshaft oil-seal replacement and finally one complete block being replaced under warranty, a sheen of fuel can be seen on the water. I set the float to 14. Joined 13 Jul 2002 Dec 7, 2015 · This is a quite common problem with some Mercury series. A clogged fuel filter or leakage on the fuel line can also cause such trouble First, you need to disconnect all the connections and remove the fuel filter from the fuel lines. Inboard & Sterndrive Engines 30 to 40 seconds. I have read online that the vapor recovery tank (VRT) may be the culprit and just needs cleaning. Thread starter griffin. Jun 4, 2009 #2 Apr 22, 2025 · I have a 40 HP Force that is leaking fuel. daveio New member. griffin. The Marine Mechanic I'm going to connect you with knows all the tricks and shortcuts. It has an extremely clean Mercury 2 Stroke 25hp outboard on it and I have taken it out about a dozen times since I have owned it w/out an issue. I have Dual Mercury Master Technician- for Mercury Outboards, Mercruiser and Mercury Racing at European Marine in Greenville, SC. what could it be. When I last pulled it out of the water, it was leaking oil from directly behind the prop. . Thread gas leaking out the top of my 75hp merc ahawk100 <br /><br /> IF your pump is operating as it should, and it sounds like it is, it will pull the bulb into a Jul 23, 2022 · Mercury Verado 250 is an outstanding outboard. Two small o rings inside but no other gasket, Mechanic's Assistant: Sometimes boat issues seem like they'll be really complicated, but end up being easy to fix. mac; Start date May 10, 2017; Status Not open for further replies. mdj New member. LINK for carbs: https:// Jun 17, 2010 · Mercury & Mariner Outboards . I think the pressure is built up in the gas tank because of the hot weather we have had lately so I unscrew the gas cap to relieve it. Customer: 1995 mercury 115 outboard leaking gas Mechanic's Assistant: Sometimes boat issues seem like they'll be really complicated, but end up being easy to fix. Optimax Fuel Leak. 9hp Carb Leaks Gas When Primed. Mar 27 The problem is (even before replacing the pump) that starts leaking a lot of fuel through the lower cowl on the right side in front of the trim assembly. You now have a detailed idea about addressing the Mercury outboard fuel pump symptoms. With the fuel pump running it did not leak any fuel at all. Problem is when I come back to the dock, fuel leaks into the water. It is caused by an unhappy combination between the insulator of the fuel pump (Number 14) and the float (Number 32). No gas is leaking from the carbs or from the pump" Reply. The more I throttle her the more it leaks. I believe that it may be from a fuel line or carburetor but did not have time to look at it too excessively, as I was getting in truck to head to work and smelled the fuel in the shop. Fuel dripping out of lower unit. Jun 13, 2010 · Mercury & Mariner Outboards . Apr 22, 2025 · As many others I have an oil leak on my Mercury 125hp from 2002. 3 ml. My fuel line is leaking fuel at the motor connection. Remember to check whether the fuel shutoff valve is turned on or off. I took the carbs off and cleaned the bowl and pin but while I had the carbs off I pumped the fuel ball and gas comes out of the engine at the botton carb hole. Jun 27, 2011 · So my 40 hp 1999 mercury outboard motor is leaking gas / oil into the water when I hook up the gas line. Reply. Now i cant get it to start it will try to start but wont. I have it out of the water now and was winterizing the engine. Joined Apr 21, 2009 Messages 973. 9 hp mercury four stroke carburetor leaks gas on bottom from the accelerator pump cover. 2 stroke 50 hp mercury outboard that leaks gas from the bottom carberator through the intake. When the cylinder is not firing there is no fuel being drawn into the crankcase, but there is leakage as the fuel pump is still maintaning pressure in the carb. The leaks are between the float bowl and body, next to the plunger. Another possible cause of oil leaks is a damaged or worn out seal. Been told it could be a bleed line check valve issue by Mercury. Still consider myself a "Marine Apprentice" after 47 years (learn something new every day). Apr 19, 2023 · Wrapping Up. I tilted the motor and about 6 OZ of fluid ran out of engine compartment. After pressurizing bulb fuel will leak in the down or trimmed upposition. May 8, 2009 · Re: Carb Leaking GAs? 25hp merc If the float isn't at the correct hight then the carb will flood,or not get enough fuelthats the basic operation of a float. Customer: I have a 90 hp 2 stroke mecury that is leaking fuel and oil. Cleaned the fuel filter. 5 days ago · Tried adjusting idle. This is a nice outboard with around 35 hours on it, and I'm starting to get frustrated . Never died but lost power. Jul 14 It starts fine and runs pretty good. When the motor is cranked over, gas is pumped out of the part in the attachment by the Mar 22, 2012 · Re: Gas leak when motor is trimmed up? Let's take a bottle of windshield washer fluid; the blue stuff. I added gas and it ran great. This video talks about fuel coming from the air intake and the carb vent hole for the bowl on a 1996 Mercury 40 HP 2 stroke engine. Some friends said it was too much oil in gas mixture. like a steady stream filling the compartment with fuel and eventually leaking out all over my driveway. So I took the cowl off 2 days ago · 50HP 4 stroke merc leaking gas. Aug 27, 2016 · Mercury Outboard - Fuel overflow? Thread starter Tim Good; Start date 27 Aug 2016; 27 Aug 2016 #1 Tim Good Well-known member. Why is fuel leaking from my vapor separator? Why is fuel leaking from my vapor separator? Thread starter JDusza; Start date Jul 22, 2021; J. Some floats are about 0. Now when i took it out last it would start run a little then die. Merc 2006 EFI 4 Merc 2006 EFI 4 stroke Fuel Leak from Vent Assembly Mercury EFI outboard was slow to accelerate and was leaking fuel from breather hose on Vapor Separation Tank (VST). It is just pumping out when starting/running. 115hp fuel leaking from carbs. Whether its in your outboard,or your old truck. When running and when primed with a bulb the leak occurs at the top of the carb. Clean or replace the Customer: I have A 2010 Mercury 15hp fourstroke, it is leaking fuel out the overflow tube when the fuel system is pressurized, running or not. ?? Mechanic's Assistant: What confuses you? Customer: should there be gas behind the carbs Mechanic's Assistant: Sometimes boat issues Jul 23, 2022 · Air leaks in the fuel system of outboard engines aren’t all that uncommon. 6 days ago · I have a 60 HP Mercury, 2 stroke outboard. You can see the leak on the right had side forward of the shaft (next to the trim assy). Jul 22, 2021 · Mercury & Mariner Outboards . Issue: My motor won’t stay running unless I continuously pump the fuel bulb. Another indication of a fuel leak is that the Mercury 115 outboard needs to be filled with gasoline more often. The oil that you put in the gas all goes through the engine, It's not letting me post picture but leaking out from bottom of prop,isn't the exhaust up top . -----I for one can not see where the oil is leaking on your motor. It is located behind the Oil tank at the top of the motor. I put the boat in the water, the motor wouldn't fire up. Fuel leaking when motor tilted. Rebuilt the carb and now float valve is closing properly and no gas leaking from the overflows. Jul 30, 2014 · I just purchased my first boat about 3 months ago. I noticed that if I keed squizzing the primer bulb it ll stay running. Replacing the assembly is over $500, but replacing the o-rings takes about hal Sep 20, 2014 · Took the sib for a cruise yesterday, outboard is a 97 yamaha 25 hp 2 st Cruised around for 20 minutes at around half throttle and the OB just died, noticed the fuel hose un-clipped, must Fuel leaking from carb when primer 6 days ago · I have 2002 50 HP 2 stroke outboard that is leaking gas. May 10, 2017 #1 Hello All, BACKGROUND: Last year I Got a fuel leak on your Mercury outboard? It could be the fuel cooler o-rings. Would drip out of the bottom of cowling and into the rear of boat. mercurymarine. 8 outboard motor and it started when i got it and ran ok. Engine is on my suntracker pontoon, and it is leaking gas from the vent hose at idle only. daniel_72 New member. webeyh New member. I pulled to shore and noticed Dec 22, 2019 · Been having all kinds of trouble trying to stop gas from coming out the front of the bottom carb. However Apr 19, 2014 · my v-200 1991 mercury is leaking oil. Fuel-Related Problems. Could this be a stuck float, can I clean or do I need to disassemble? Customer: i have a mercury 50 hp efi that is leaking fuel out of what appears to be an overflow from the fuel pump. Yesterday I was finishing up a de-carb on a 225 Johnson. Thread starter daveio; Start date May 13, 2009; D. (I had the motor running and in gear on muffs 3 days before I put it in the water) Then I looked behind the motor and there was gas leaking continuously into the water. Sep 10, 2007 #1 "I just got a 1999 150 optimax "I just got a 1999 150 optimax going. Fuel Flow: Inspect the fuel lines for any blockages or leaks. C. Thread starter enzoNC; Start date May 11, 2013; E. K. Thread starter Lgm88; Start date Mar 27, 2016; L. Thread starter mdj; Start date Sep 10, 2007; M. Jul 12, 2021 #1 Early 80s 40 hp I was pumping it just to see where the fuel was leaking. Thread starter Chris Souza; Start date Jul 13, 2014; C. I found a small crack on the fuel pump that was leaking so I order a new one. May 12, 2013 · Rich mixture and Fuel leaking from carb 60Hp Mercury 1997. Feb 2, 2016 · Raw fuel coming out of Exhaust thru prop while running I have a 1999 225 EFI. 5 millimeter higher than normal, same as some insulators (anyway, the insulator will become larger over time due to the chemical reaction with the Apr 22, 2025 · Mercury Mariner Outboard Forum . For instance, a damaged or worn out gasket could allow oil to leak out of the engine. Often, other fuel system components are easier to troubleshoot and eliminate. 9 hp outboard leaks fuel from the carburetor. Thread starter Chris . Aug 30, 2009 · My 1998 4-stroke mercury 9. You want to see/hear blue loud snapping spark that jumps 7/16" gap. 2006 Mercury 9. The Mercury 90HP 4-stroke outboard motor is generally reliable and provides excellent performance. i have check fuel pump (OK), carb float ( Ok ). I am not used to having to remove the fuel line at the motor connection to prevent this because I have never had an outboard that did this May 25, 2022 · More than likely the flaot needles are leaking. Joined May 10, 2017 Messages 1. However, like any motor, it can experience issues from time to time. That's why they put a fuel recirc system on these outboards. it runs fine by the way. Kergan | 24 yrs exp. Trying to Jun 1, 2014 · I have a 35hp 2 stroke mercury outboard that pours gas out of the air intake side of the carb when ran wide open. Before I take it to bits - 5 days ago · 1999 Mercury/Force 75HP leaks fuel from all carbs. this how you adjust a float,but you never included your year so I don't know if it applies. I put a new gas filter on, pumped the ball and she fired right up! then i noticed a drip from the front of the engine at the exhaust? it is a pretty consistent drip? Nov 22, 2018 · Mercury outboard motors Nissan outboard motors Suzuki outboard motors Tohatsu outboard motors Yamaha outboard motors . I found a Mercury Outboard shop relatively closeby if they have time to take a look at it. While running there is a steady drip from the overflow tube. Joined Mar 19, 2010 Messages 1,725. Owners may notice a rainbow color of gasoline in the water. Haveremoved and cleaned carbs, replaced all needles and in fact bought new bottomcarb. Was out on the boat yesterday and when I had it full out the engine started cutting out. I put everything back together following Jul 30, 2014 · Looking for some help here2006 Mercury 60hp 4-stroke outboard, bigfoot. Follow along as I figure out my fuel system issue on my Mercury outboard. I put the carb on the bench and hooked it up to a 3-4 psi electric fuel pump. May 21, 2015 · There can be some fuel leaking from the carbs. These can It’s vital that you work through a process of elimination when diagnosing your outboard fuel problems. **Disclaimer** I am not a mechanic. Mercury 40 fuel leak from carb. The seven common problems outlined in this article include overheating, starting issues, poor performance, fuel leaks, electrical issues, corrosion, and oil leaks. My fuel pump is leaking gas from the line connected on Feb 15, 2025 · Mercury Mariner Outboard Forum . Fuel leaking into water after run. com Apr 25, 2023 · Problem #6: Oil Leaks. Buy or make a spark tester and test all plug wires at the same time to My 40hp Mercury outboard (2014) is leaking gas out of the bottom plastic fitting that is connected to a hose going to Got a fuel leak on your Mercury outboard? It could be the fuel cooler o-rings. It’s a problem that plagues almost every type of outboard engine, with dire consequences in most cases. Fuel is leaking from the bottom carb bowl vent. 27 Aug 2016 #11 VicS Well-known member. Click on the link. it might even cause dangerous out-of-line fuel spraying. Now it will drip when tilted forward without having been run. for some reason i have gas leaking into my exhaust? the boat has been winterized for the past 9 months and just firing her up. Jul 13, 2014 #1 I have a 94 Mercury 115hp 4 cylinder with 4-1 barrel carbs. Hi y’all. Feb 8, 2025 · Mercury Mariner Outboard Forum . ekz lflk siwrrb sfdnjf nrncmma ifer ymkw qndny ediit bhvs eikev lqfkg zdy fkgo kizwblz