Hey Boyd. Does your boat max out at 5500 RPM? My 2001 Islandia only goes 30 mph and at 5300-5400 RPM. When I'm loaded it'll only go 15mph. If you top out at 5500RPM then I'll conclude that it's my impeller that is the problem.
Thanks!
Whale watcher
Member Since 22 Apr 2014Offline Last Active Jun 12 2014 03:38 PM