TROUBLESHOOTING
SERVICE MANUAL NUMBER 22
90-860074--1 FEBRUARY 2002 Page 1C-33
Insufficient Water Flow From Belt Driven Seawater Pump
Cause Special Information
1. Drive belt 1. Loose, worn or broken
2. Seawater shut off valve partially or
fully closed
3. Clogged or improperly installed sea
strainer
4. Loose hose connections between
seawater pickup and seawater pump inlet
4. Pump will draw in air, pump may fail to
prime or will force air bubbles into cooling
system
5. Seawater inlet hose kinked or plugged
6. Seawater pickup plugged
7. Obstruction on boat bottom causing
water turbulence
7. Obstruction will be in front of seawater
pickup, causing air bubbles to be forced
into cooling system
8. Faulty seawater pump
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