Calling all gearheads!
On my 1998 380 Sundancer. Owned boat for about 5 months. Engines will not drive boat faster than 19.5mph and RPM on boat engines does not go higher than 3300. This is on both engines. Bottom was just repainted and no issue with growth on props or bottom. High vibration at low and high RPM's. I am changing the spark plugs but I think the plugs were changed before I bought the boat. No overheating at any time. Fluids are all normal. Does anybody have any advice on a prioritized checklist to diagnose and fix this problem? Thanks in advance!
On my 1998 380 Sundancer. Owned boat for about 5 months. Engines will not drive boat faster than 19.5mph and RPM on boat engines does not go higher than 3300. This is on both engines. Bottom was just repainted and no issue with growth on props or bottom. High vibration at low and high RPM's. I am changing the spark plugs but I think the plugs were changed before I bought the boat. No overheating at any time. Fluids are all normal. Does anybody have any advice on a prioritized checklist to diagnose and fix this problem? Thanks in advance!