Trouble shooting issue on friends boat
Trouble shooting issue on friends boat.
1986 Four Winns 21' bow rider
OMC outdrive
Boat is running real rough at WOT.
Boat seems to run fine at idle, even at 1/2 throttle.
Coil replaced last year.
Fresh gas
New water separating filter.
New gas filter
Just added gas additive to condition the gas and clean the carb.
Washed Flame arrester in cleaning fluid
With all this, still runs rough as described above.
Only other thing I could think of were spark plug wires loose from plugs or coil. Possibly maybe fuel pump ?
Thoughts?
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