Originally Posted by Sailingsid
Can you help?
My engine is not firing on all cyclinders, well, that's what seems to be the issue.
What should I check first:
and what am i looking for.......!!
You are looking for a needle in a haystack!!
We have a similar problem on a Yamaha 75, bottom cylinder not firing, we checked everything, plugs, coils, leads, wiring, CDI unit, compression test, reed valves, carbs stripped and cleaned and we STILL have a problem! Powerhead off tomorrow, suspected crankshaft seals.