Trying to help a friend get his boat back going.
I am not a boat mechanic, but have been tinkering with cars for 40 years so know way around an engine fairly well.
This is a 1992 boat with 5.0 OMC engine.
He said it was bogging down and backfiring. When I checked it out found all the plugs...
05 Kawasaki 900 starts out great - but then bogs just as rpms get up. Hold the throttle and it will pick rpms back up - then do it again.
Pulled plugs and were pretty well fouled. Put new in and ran great for a couple hours, then started same thing again. Pulled new plugs and they looked like...
