i havew a 03 moomba and my speedo some how stoped working right and it is now about 5 mph off what coulo of caused this i have looked over eveything what could be the problem?
Clean out the pitot tubes on the transom with a safety pin. They get clogged. When you get tired of doing that every day, get Perfect Pass with a paddle wheel speedo!
Your Moomba has a paddle wheel, not pitot tubes. There is a calibraton knob on the dash or or side wall next to drivers knee or throttle. You can calibrate the speed with a gps or in a ski course with a stop watch.