Steve Diomin
Cadet
- Joined
- Jul 30, 2010
- Messages
- 9
I have a 1998 5.0l merc carberator engine running rich. The engine has 250hrs. I have just put in new plugs as the old were black and sooty, put a new rotor and cap also. The boat runs great cold but as it warms up it seems to richen up. The electric choke is closed when it starts and slowly opens as it warms. I ran some carb cleaner threw the tank but that seemed to not help. Sometime while running 20mph you can feel the engine want to sputter out or choke. When puttering back to the dock it almost wants to stall as it is burning so rich. I beleive the cylinders are getting way to much fuel but i dont know how to combat this or whats making it do this. A guy thats knows what he is doing looked at it last year when bringing it out of storage and he did make the coment about how much fuel was shooting out the spark plug holes as we were turning the boat over without the plugs in to clean it out. Like i said it runs fine cold, one pump and it fires right up, 75% of the time when warm and starting up the engine it turns and turns like 10 times before it fires and you really get that flooded feel and smell. No one has ever tinkered with any of the engine and the carb seems to be lined up to the specs...
What the heck is going on?.
What the heck is going on?.