Scout Boats 420 LXF, Owner'S Manual

Page: 41 / 202

41
Propulsion System
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.
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.
Some are as follows:
• You should be sure the load conditions are
those normally experienced. 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
the propellers, there is a good chance the
propellers are not the problem.
• The addition of heavy equipment like a tower,
life rafts, additional coolers, etc., will cause
additional load on the engines. Consequently,
different propellers may be required.
• 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.
Yamaha Propeller
Notice:
Outboard engines can be damaged and the
warranty voided if the boat is not propped
correctly. Always consult your Scout dealer
or authorized engine service dealer when
making changes to the propellers or if the
boat does not run near the top recommended
RPM.
Typical Quad Engine & Propeller Rotation
Note that the engine rotation on your boat may be different, depending on the engines installed.
https://www.boat-manuals.com/