MarineEngine.com does not offer troubleshooting assistance or repair advice by email or by telephone.
You are invited to join our public Boat Repair Forum to seek assistance from other members.
You may also visit the Boat Motor Manuals section of our site to obtain a service manual.
It's always the top cylinder that fouls out, bottom looks great by reading the plugs.Leaking fuel pump diaphragm, is it always the bottom cylinder?
I think so but as soon as you throttle down it is back not idling again.Process of elimination, switch the coils and see if the problem follows the coil. Costs nothing to try. After that plug fouls while trolling, does the engine regain that cylinder after you get the engine back to planing speed heading back to the ramp or do you have to clean it before taking off?
Or should I say idling poorly, it is obvious that it is idling on one cylinder.I think so but as soon as you throttle down it is back not idling again.
The fuel pump is on the carb on that motor.Leaking fuel pump diaphragm, is it always the bottom cylinder?
Yeah it's all new.The fuel pump is on the carb on that motor.
Yes, that is a super easy carb and fuel pump. Yes with the kit you get 2 different fuel pump gasket kits and yes I did put the wrong one on at first like a dummy but it's all right and no cracks in the plastic partition. As far as I can tell the carb is working as it should. I have thought about switching the coils like you suggested too to see if the cylinder fouling switched as well, but they are so cheap I think I may just change them anyway. I can also get a set of reeds for cheap as well. I may just go ahead and change them as well, heck I can do all that for less than the carb kit was. I had to buy the expensive one because the cheap ones didn't come with a float needle which was the main issue to start. Now I know I could have ordered it separately if you look up a slightly different model but has the right needle in it. If I change the coils, reeds and while I have the carb off I may just for the sake of argument order the cheap gasket set and change the fuel pump gaskets again. Heck why not.Did you make sure all the right gaskets were used in the rebuild?
