1988 175 mercury

[masnod]

"At full trottle im running at

"At full trottle im running at 5000 rpm it was around 5600 rpm.
So far I changed my fuel bulb and lines ,cleaned my fuel tank,checked my carberators and they open and close together.Please help
Thanks"

 

[masnod]

All new spark plugs were insta

All new spark plugs were installed also

 

[spanaman]

"Gday Charles
All the usual t

"Gday Charles
All the usual tests first comp, spark, fresh fuel etc. Is your boat now sluggish out of the hole? Under load (back your boat into the water, run it in gear still on the trailer) at approx 2500rpm cylinder drop test your engine to isolate which cylinder is not performing and then find out why. Be very careful a blocked main jet will fry your engine. It maybe time to overhaul your fuel system, filters, pump, carbies etc or you may have a dud coil or switchbox.

Cheers Spanaman"