Mercury 75 4 stroke problem

**Bluegill Bill** · 02-05-2010, 05:14 PM

I'm not trying to turn this into an "Oil Thread" but I use Mobil 1 Synthetic in my 4 stroke Mercury and have since day one. I believe in synthetic as it dissipates heat better and is a superior lubricant, but that is an opinion and nothing more. Good luck and let us know what the problem is once it's found, maybe it'll help us 4 strokers out someday.

"Shep"

**Dave Willis** · 02-20-2010, 08:50 AM

Originally Posted by minnow 123

I have a 2005, 17 foot Triton with a 75 four stroke. I'll run up the lake and fish for a couple of hours and when I crank it back up,it will smoke, like a two stroke.After a few trips to the lake,it starts running like it's not running on all cylinders.It starts cutting down on power and it will go back and forth(run normal,then it will go back to running like it's not running on all cyl.) .I've took it to the sports center parts in perry Ga and they run all the test on it.They do compression test and others and tell me nothings wrong. I will take the spark plugs out and they will have a fair amount of oil on them.I clean the plugs and reinstall them and the motor,will run normal until I need to clean the plugs again.Has anyone had any trouble with a fourstroke or can someone tell me why my motor is doing this and what can I do to fix it?

Then trade It to them and get you a new one!:D

**minnow 123** · 02-20-2010, 10:04 PM

I have thought about running synthetic in the motor and I will use it,the next time I change it. I run Mobil 1 full synthetic in all my cars,truck and commercial Scag lawnmower.

Thread: Mercury 75 4 stroke problem

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