Overheat Warning System - Yamaha EXCTER220 Owner's Manual

OVERHEAT WARNING SYSTEM

The engine has an overheat warning
device. If either engine starts to over-
heat, the engine speed of the affected
engine will be limited to about 3,500 rpm.
Each engine is equipped with cooling-
water pilot outlets on the starboard
side of the hull. Check that water
comes out of the outlet while the
engine is running, particularly while
applying throttle. If you do not see any
water at the outlet, cooling water may
not be circulating in the engine.
_________________
NOTE:
If water cooling passages on the
engines are dry, it will take about 20
seconds for water to reach the pilot
outlets after starting.
F & F
EATURES
If water is not circulating, something
may be clogging the jet intake grate.
Refer to the Jet Pump Clean-Out pro-
cedures on page 5-4 for further infor-
mation.
CAUTION:
If the cause of overheating cannot
be found and corrected, take special
precautions to avoid major engine
damage while you return to shore.
SINGLE ENGINE OVERHEATING —
Shut off the overheating engine and
use the properly running engine to
return to shore. Operate at "no-
wake" speed to prevent water from
flooding the non-operating engine
through the cooling water intake.
BOTH ENGINES OVERHEATING—
If getting a tow from another vessel
is not possible, operate
engines just slightly above idle
while you return to shore. If you can
be towed, refer to "Towing the Jet
Boat" on page 5-3.
2-11
UNCTIONS
________________
both
2