My father has a 60 hp 4stroke EFI Mercury engine for his pontoon.I think he bought it in 2003,the problem is one sprarkplug is always wet,he has had the power head changed,think's has the coils replaced and other work done on it also.
My question is is there something we didn't see, does someone have any possible answers.
A wet plug might be a symptom, but it is not a problem.
Because the engine turns over a time or two AFTER the ignition is turned off it would be normal to expect at least one cylinder to have unburned fuel in it.
Here's the thing, he puts in a new sparkplug goes for a ride comes back and its wet,seems the motor is running rough and burns fuels faster than normal.
6o efi mercury 4 stroke sparkplug wet
Linear Mode
