TROUBLESHOOTING
SERVICE MANUAL NUMBER 24
90-861327--1 OCTOBER 1999
Page 1C-7
Improper Full Throttle Engine RPM
RPM Too High
Cause
Special Information
Propeller
Damaged, pitch too low, diameter too
small, propeller hub slipping
Boat
Water pickup or through hull fittings
mounted too close to propeller (ventila-
tion); keel located too close to propeller
and/or too deep in the water (ventilation).
Drive installed too high on transom; wrong
gear ratio.
Operation
Engine coupler slipping
Unit trimmed out too far
RPM Too Low
Cause
Special Information
Propeller
Damaged, pitch too great, diameter too
great
Boat
Dirty or damaged bottom; permanent or
power hook in bottom; false bottom full of
water. Drive installed too low on transom;
wrong gear ratio.
Operation
Unit trimmed in too far
Index