Yamaha F90
I hit a shoal and bent the drive shaft, Marina repaired and now the boat RPM is much higher than normal! ie. full throttle/speed 6400 rpm now aprox 7500rpm.
My thoughts and tests:
- The New prop has the same stamp for size/pitch as the old one (could prop be stamped wrong?)
- hooked up another Tach and it showed RPM's match to eliminate faulty tach.
- could reassembly by mechanic accidentally put the wrong gears into the lower unit to throw the gear ratio off?
would anyone else have any suggestions on what to check? The marina has not given me any suggestions or options.
Thank you!
I hit a shoal and bent the drive shaft, Marina repaired and now the boat RPM is much higher than normal! ie. full throttle/speed 6400 rpm now aprox 7500rpm.
My thoughts and tests:
- The New prop has the same stamp for size/pitch as the old one (could prop be stamped wrong?)
- hooked up another Tach and it showed RPM's match to eliminate faulty tach.
- could reassembly by mechanic accidentally put the wrong gears into the lower unit to throw the gear ratio off?
would anyone else have any suggestions on what to check? The marina has not given me any suggestions or options.
Thank you!