posted 07-09-2003 10:46 AM ET (US)
PMucciolo,Yes, I do have an update.
We replaced the stator and added a st.st. lock washer to the motor's negative power lead. This fixed the high speed cutouts and steadied the voltage readings, but I'm still not certain the charging system is performing as designed.
At idle the voltage readings are 13.8 - 14. At speed throughout the RPM range, voltage readings drop to 13.4 - 13.6 indicating that the battery is getting a better charge @ idle, just the opposite of what should be happening.
My last motor, a Yamaha 225 EFI, showed 12.8 volts @ idle and increased to 14.2 volts @ WOT.
Yamaha tech says the voltage readings are acceptible and fall within spec, but I'm not certain the charging system is performing as designed, and in fact sent another email this morning reiterating this point.
Other than this charging snafu, the motor is superb. Originally designed for twin outboards, my 1992 23 Walkaround, 4050lbs, (w/o bracket) performs nicely with this powerplant.
Top speed fully loaded: 39 MPH @ 5200 RPMs
Cruising speed: 25-29 MPH @ 3700-4100 RPMs
Fuel efficiency: Optimum, 27 MPH, 9GPH= 3MPG+/
Time to plane: 4 seconds
All-in-all a good setup, but I'll be much happier to get the charging system running the way I think it should be.