Monterey Boats 378SE, Owner'S Manual

Page: 42 / 210

42
MONTEREY
BOATS
Propulsion System
Your boat was shipped with propellers that typi-
cally provide optimum performance for your boat.
However there are factors that can affect perfor -
mance and propeller requirements.
Notice:
Before changing propellers to correct boat
performance problems, be sure other factors
such as engine tuning, bottom and running
gear growth, etc. are not the source of per-
formance changes. Always be sure the load
conditions are those normally experienced
before changing propellers.
• The addition of heavy equipment like excessive
gear, additional coolers, etc., will cause
additional load on the engine. Consequently,
different propellers may be required.
• If the boat ran in the required RPM range
when it was new and you have not added
any additional gear or heavy equipment and
have not damaged a propeller, there is a good
chance the propellers are not the problem.
• Boats operated at high altitudes (above 2000
feet). Engines operated at high altitudes will
not be able to develop as much horsepower
as they do at or near sea level. Consequently,
different propellers may be required.