2008 90hp Merc outboard EFI

shep75

Cadet
Joined
Oct 8, 2006
Messages
10
I cant seem to get this engine running good. It seems to be running on 3 cylinders. I have to floor it to get it started and it wont rev past 2500 it wont idle either. I have changed the plugs and moved coils around to diff cylinders and nothing changes. All 4 coils are sparking on the correct cylinders. when i remove the spark plugs 3 out of 4 are black and the other one looks brand new but it has wet gas on it, and it sparks when you have it connected to the coil and hold it next to the block. Please help
 

Jeep Man

Commander
Joined
Oct 17, 2008
Messages
2,803
Re: 2008 90hp Merc outboard EFI

Why mess with it? Isn't it still under warranty.
 
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