Corsair Foiler 2200 Owner’s Manual - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 23
The lower unit should never be trimmed up to a point
where the propeller cavitates (or slips). A rapid
increase in engine RPMs is evidence of cavitations. If
this occurs accidentally while running at full throttle,
immediately lower the lower unit trim and reduce the
throttle unit until the slipping stops. Have your dealer
reset the trim limit switch to avoid over trimming in the
future.
If the prop slips at lower planning speeds, the lower
unit may be trimmed too high. Immediately lower the
lower unit until the prop "grabs" again to restores effi-
ciency.
On performance boats, trimming out, in addition to
raising the bow, also lifts the boat higher, gaining speed
because of less hull in the water.
Excessive trim will decrease maneuverability; change
steering characteristics, and may cause "proposing"
(bow oscillates up and down) or "chine walking"
(rocking from side to side). USE POWERTRIM
WITH CARE.
ENGINE INSTRUMENTATION
The following section is presented to familiarize you
with the instruments, which may be on your boat.
Every boat is not equipped with full instrumentation.
All factory installed Yamaha engines include Yamaha's
digital multifunction tachometer and speedometer.
Refer to your engine operator's manual for use details.
Tachometer
The tachometer displays the number of revolutions per
minute (RPM) the engine is turning. There is a
designed operation RPM range for the engine. Become
familiar with the operating range of your engine and its
operating characteristics. The tachometer can be used
to better understand the performance of your engine
and your Corsair Foiler 2200. By monitoring your
tachometer as you operate your Corsair, you will find
RPM ranges that work better in certain sea and load
conditions. Be alert the tachometer operation may pro-
vide an early indication of difficulty, before it becomes
irreversible.
Engine Alarms
Most utboards are equipped with several audible
engine alarms. Your engine owner’s manual will famil-
iarize you with these and their sometimes-distinctive
sounds.
If an engine alarm sounds, shut down the engines until
the source of the problem is determined.
Speedometer
The speedometer indicates the boat speed in miles per
hour. Their accuracy can vary from the actual over the
bottom speed, due to many factors. Boat speedometers
calculate the speed by amount of pressure the moving
water forces into a "pitot" tube. These gauges should
only be used as indicators of approximate speed and
not used as absolute speed indicators.
Temperature Guages
This is designed to monitor the operating temperature
of your engine's cooling system. A sudden rise from
the normal should be investigated to determine if there
is an obstruction in the cooling system.
Water Pressure Guage
This gauge measures pressure in the engine cooling
system. If the pressure changes from the norm it could
