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6-12
Break In Procedure
Make sure all your passengers are properly seated before starting
the break in procedure. After the engine is thoroughly warmed up
and you have driven the boat into a large open area, advance the
throttle to wide open until the maximum rpms are reached. DO
NOT exceed 5,000 rpm. Reduce the throttle to 2,800-3,000 rpms
and cruise at or below this speed for 30 minutes. Reduce the speed
to idle, advance the throttle to wide open and operate at that speed
for one minute; reduce to the previous cruising speed for a few
minutes and repeat. Accelerating from idle speed to wide open
assists in seating the piston rings. This cycle can be repeated from
time to time during the first five hours of operation. DO NOT
operate engine at full throttle for longer than one to two minutes.
Propeller Selection
The maximum rpm of the engine at full throttle under normal load
conditions can be controlled by propeller pitch, diameter and
design. It is essential the propeller does not underload or overload
the engine.
Propeller Overloading, results in low rpms at wide open throttle
will give poor performance, poor fuel economy and eventually
result in engine damage.
Propeller Underloading, if operated with a propeller that has too
little pitch or diameter, poor performance will result.
Section 6
Correct Craft, Inc.
Follow these procedures only when
conditions are such that you can drive the boat safely.
DO NOT attempt to break in an engine by letting it idle at
the dock.
CAUTION
Naut Air Sec 6.qxd 8/29/06 4:23 PM Page 6-12