MAINTENANCE
66
The seawater pump impellers (three in one pump assembly) should be
inspected whenever insufficient seawater flow is suspected. The two rear
impellers supply the engine with water and the front impeller supplies the
charge air cooler (CAC). The impellers supplying the engine should be
inspected if the engine operating temperature exceeds the normal range.
The charge air cooler impeller should be inspected if the discharge stream
for the charge air cooler is less than normal. Consult your boat owners
manual for the location of the charge air cooler discharge location.
7451
Flushing Cooling System
!
WARNING
Avoid possible death or serious injury. Always remove the propeller
before flushing the cooling system.
!
CAUTION
Avoid engine damage from overheating. If the engine is operated above
1500 RPM during flushing, suction created by the seawater pickup pump
may collapse the flushing water hose causing the engine to overheat.
To prevent silt and salt buildup in the cooling system, flush with freshwater.
1. Install a flushing hose from a water tap to the flushing connector.
Consult your boat owners manual for the location of the flushing
connector.
2. Completely open the water tap. Place the remote control in neutral
position and start the engine. Operate the engine at idle speed, in
neutral, for about 10 minutes or until discharge water is clear. Stop the
engine, shut off the water, and remove the flushing hose.
Summary of Contents for HP1075 SCi
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