Yamaha F25 - Manual (Page 32)

Operation
27
Bow Down
Too much trim-in causes the boat to “plow”
through the water, decreasing fuel economy
and making it hard to increase speed. Operat-
ing with excessive trim-in at higher speeds
also makes the boat unstable. Resistance at
the bow is greatly increased, heightening the
danger of “bow steering” and making opera-
tion difficult and dangerous.
NOTE:
Depending on the type of boat, the outboard
motor trim angle may have little effect on the
trim of the boat when operating.
EMU27921
Tilting up and down
If the engine will be stopped for some time or
if the boat is moored in shallows, the outboard
motor should be tilted up to protect the propel-
ler and casing from damage by collision with
obstructions, and also to reduce salt corro-
sion.
WARNING
EWM00220
Be sure all people are clear of the out-
board motor when tilting up and down,
also be careful not to pinch any body parts
between the drive unit and engine bracket.
WARNING
EWM00230
Leaking fuel is a fire hazard. Tighten the
air vent screw and place the fuel cock in
the closed position if the outboard motor
will be tilted for more than a few minutes.
Otherwise fuel may leak.
CAUTION:
ECM00231
● Before tilting the outboard motor, follow
the procedure under “Stopping engine”
in this chapter. Never tilt the outboard
motor while the engine is running. Se-
vere damage from overheating can re-
sult.
● Do not tilt up the engine by pushing the
tiller handle because this could break
the handle.
● Keep the power unit higher than the pro-
peller at all times. Otherwise water could
run into the cylinder and cause damage.
● The outboard motor cannot be tilted
when in reverse or when the outboard
motor is turned 180° (facing the rear).
U69M15E0.book Page 27 Wednesday, April 5, 2006 4:48 PM