Mercury 90hp 2 stroke hard starting. Try holding it in while cranking and raise the warm up lever slightly. Once started it runs fine up to full RPM without problem, but I usually have to do some combination of priming, popping the cover and holding the throttle open manually for a few pulls, burning incense for Buddha, etc to get it going. Wet. I cleaned them and had the motor started with a first try! Next day the same thing- hard to start, so I did the same- took out spark plugs and cleaned them. Check Fuel Level: Ensure there’s enough fuel in the boat’s fuel tank. To learn how to diagnose & start a 2 stroke outboard motor, explore our post!. Jun 2, 2023 · 2. Mar 24, 2013 · 2007 Mercury 90 2 stroke carb'd. Probably too many to mention. Should make things a lot better. and starts great the rest of the day. Jul 7, 2008 · Re: Primer Bulb won't stay hard. I couldn't start her cold to save my life when I first got her. Aug 17, 2013 · Hi. The engine starts fine when cold (every time) with just a bit of choke. It takes anywhere from 15-25 pulls on the starter rope to get going but from then on, it starts on the first pull the rest of the day. Continue to hold the key IN after the motor starts to keep it from dying. However, like any mechanical device, they can occasionally encounter issues and require troubleshooting. very hard to start. Let’s start with the basics. Many things can affect idle quality. Dec 4, 2011 · For the past two weekends I have taken my boat (90 hp 2 stroke 2001) to the lake and it has been very difficult to cold start. May 29, 2020 · #fishingboat #boatmaintenance #boatrepair Sep 15, 2009 · I have a 1996 Merc 15 hp 2-cyl outboard that is virtually impossible to start. My procedure: 1. because i have to pump the bulb as the motor is tuning over i feel like it is the fuel pump that is the issue Nov 15, 2002 · My 90hp is not a piece of junk, she's just a little cold blooded sometimes. No different. once it starts it runs like it should and doesn't seam to have any issues. I was at the point of thinking of selling it and getting a fuel injected engine simply because I was frustrated every time I had to start the engine cold. Jun 5, 2007 · On the water it will run at full throttle without surging and turn at about 5300rpm. -----The pressure comes from priming the bulb before start-up. Next morning it is hard to start again, but did start after about eight trys (last try short primer/choke and half throttle). This was an improvement. Apr 21, 2016 · For the record, the correct starting procedure is to push the key IN, and hold it, for several seconds *before* cranking a cold engine. Battery is new( AutoCraft M24-3 800 CCA) Bulb is firm, engine will crank for 5-10 seconds and battery will start to give out. Make sure the choke plates fit snug against the carb body. Rebuilt the carbs, new plugs, new filter all around 100 hours or so ago. The one that we fear the most is uneven compression. when it does start it runs horrible and smokes really bad (more than usual)and only at about 3800 rpms tops with muffs on in the drive way and will not idle. Mar 15, 2005 · Re: hard starting 115hp mercury DocF76,<br /><br />The I-6's are known for hard starting when cold. Sometimes it hard at first to start and runs and starts great the rest of the day. May 2, 2024 · How To Get Your Mercury Outboard Started in 5 Minutes… 1. Aug 26, 2019 · Outboard motors can be finicky, especially if you purchase an older model. <br /><br />It all that fails you can try what I did to mine. Drain the fuel tank if necessary and refill with Aug 5, 2014 · I have a year 2000 75 hp mercury 2 stroke that doesn't want to start unless the priming bulb is being pumped at the same time as the engine is being turned over. Sometimes she will start before the battery dies. When I first launch the boat, the outboard starts right up, idles, and runs great. Check the operation of the choke solenoid. The routine in the manual isn't much help so I'm hoping some other owners of this engine might have some hints. Been running great. Feb 27, 2006 · I've had a 1999 carbed Merc 90HP, and a 2002 carbed Merc 50HP. It has always been cold natured and hard to start. Possible Causes and Solutions: Low or No Fuel: Check the fuel tank and fill it if necessary. Make sure the fuel line is properly connected and free of leaks. Common Mercury 90hp 2 Stroke Problems At a Glance. It runs great and starts right up after it fires up for the first time of the day. Sep 8, 2008 · I have a 2000 mercury 40hp 2 stroke 2 cylinder electric start and power trim. The 90 HP 4-stroke Mercury engine is one of the popular choices among boaters looking for an efficient, reliable, and powerful engine for their vessel. ) Trim as Scott mentioned 2. You also said you replace one of the deep cycle bateries with starting battery. Oct 24, 2009 · I have a 2006 year model mercury 90 hp 2 stroke, it runs great once started. does a 06 mercury 90 hp have a choke Jul 11, 2011 · I have a 90hp mercury 2 stroke which is really hard to start after sitting for a few days, once started it will start every time after that unless you let it sit for 30 mins then it is hard to start again and you get a big puff of smoke. Typically, they’re as easy May 30, 2023 · Mercury 2-stroke outboard motors are highly regarded in the boating world for their reliability, performance, and efficiency. Somethings not right. In this blog post, we’ll explore common problems associated with Mercury 2-stroke outboard engines and provide detailed, step-by-step solutions for fixing them Aug 13, 2023 · Last time I discussed about Mercury 50HP 2-stroke problems and now it’s about 90 hp 2-Sroke problems. Remote steer/start. How to Start a Mercury Outboard Motor. but it don't help. Stale or contaminated fuel can prevent the engine from starting. Those motors (Depending on year) have always been hard to start when cold. Maybe a little less. Oct 16, 2016 · Motor is hard to start cold. First let’s get a quick overview table on Mercury 90hp 2-stroke problem. May 27, 2012 · Re: Root cause of Mercury 2-strokes' rough idle Rough idle is a subjective statement. Thanks for the help everybody. If the fuel level is low, refill it with fresh gasoline. Doesn't seem to fire up like it used to. I have a 2002 (I believe) 90 HP Mercury 3-cylinder 2-stroke. Feb 16, 2014 · Re: 2001 90hp 2 stroke mercury, hard to start pushing in the key while cranking activates the "choke" and gives it that initial gulp of fuel to start. While Mercury is widely known for building top-quality outboard engines, it can be assumed that some users can … Mercury 90 HP 4 Stroke Problems: Troubleshooting Jun 23, 2015 · I have a Mercury two stroke outboard 3 cylinder, I'm only guessing but probably 1990 ish. I have a 2003 90hp 2 stroke mercury 350hrs on clock when starting from cold i have to keep choking it by pushing key in for a second until revs pic up, revs will die down again after about 5 seconds then choke it again this can go on for 2-3 minutes until it will idle on its own any ideas on what could be the problem motor runs and starts fine once warmed up Jul 15, 2008 · Re: starting problem 2 stroke Mercury 115 outboard I would not think the side to side list would have any effect on the motor's starting ability. Pump the primer bulb firmly. She'll usually start right up. Sometimes near as good as a 4-stroke. Today Jan 17, 2012 · Re: 2005 2 stroke Mercury Saltwater 150hp hard starting makes humming sound But you said it stops cranking after a bit and begins to hum. like when it hasn't been started for a week or two. Mercury makes a 2-stroke and 4-stroke engine. Yesterday I started the motor for the first time in over 3 months and I had NO PROBLEM. Mercury 50hp 2 stroke starting procedure. That says weak battery. The 4-stroke engines have risen in popularity due to their reduced noise, fuel efficiency, and greater longevity. After a couple minutes rest, a battery can recover to the point where it is again able start the engine. -----Perhaps spray some mixed fuel into the carburetor as a test. Because they’ve grown in popularity in recent years, most of them tend to be newer. I probably didn't explain myself real well, my other boat I had, had a 2 stroke engine on it, and when I would first go to pump the primer bulb, after a couple of squeezes, it would get full. I changed the fuel line a couple weeks ago and I've had it out on the water probably 3x since then and it's been good. 2. the key says push to choke. Apr 15, 2012 · Holding the choke on with the 2 cylinder motor and not cranking does nothing. i can't hear any noise when pushing the key. Engine Will Not Start or Hard Starting. When warm the engine restarts fine up-to about half an hour or so of running time but after that it get more difficult to start Feb 24, 2010 · Re: Mercury 150 hp carb cold hard starting Hey, I've got a 2001 Mercury 150 hp carb that I bought new. ) with the key I do 3 pumps then hold. I follow my usual procedure - high rev arm halfway, bulb primed and firm and good battery, key turn. my problem is it is very hard to start when cold. Oct 26, 2008 · I have a new 90HP Mercury 2 stroke that I haven't found the right "trick" for starting for the first time of the day. If all is normal, 2-stroke idle is acceptable. I took the engine to a local Mercury Apr 2, 2012 · Re: Hard starting mercury outboard hot or cold assuming ur compression readings are correct they are too low for a 2 stroke motor the 10 psi variance is getting near enough to worry about but currently the difference isnt your concern low compression will make a motor hard to start as for the idling concern u have a fuel supply/delivery problem. Aug 22, 2011 · I have been experiencing a starting problem the last 3-4 times I have used my boat. Fuel Quality: Check the fuel quality. -----On a 2002-115 HP there is an " enriching system "---This system injects fuel when there is pressure on the system. On my 50hp 2002 my primer is in the Jun 4, 2023 · Mercury Marine has been manufacturing outboard engines for more than 75 years. Jul 29, 2010 · Re: 2001 Mercury 90hp 2 stroke hard to start Well, I took out the spark plugs and all 3 are covered in black oil. So, keep reading. It seems like the battery is not holding a good charge for very long. If your Mercury 4-stroke outboard engine is difficult to start or won’t start at all, a variety of factors might be responsible. The newer ones had enrichener valves rather than choke plates. Gang, I have a hard time starting my 1999 Merc 2-stroke 25HP and can't figure it out. Tilt the engine down so any gas that gets past the floats will drain into the carbs.
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