Jet Drive Debris Removal Procedure
1. If debris or rocks are ingested into the suction side of the jet, damage may occur.
Symptoms of debris entry may be:
A. Over heating
B. Cavitation (aeration of jet drive)
C. Poor performance
D. Noisy jet drive
A. Decrease RPM's
B. Drive boat to a safe place at partial throttle
C. Shut off engine and remove ignition key
D. Turn on bilge pump
E. Remove clean out cover bolts
F. Remove clean out cover
NOTE: For certain pump models the clean out cover is inside the hull, so upon removal of cover water will begin to enter the bilge area. By intermittently replacing and removing the cover, the debris may be cleared and give the bilge pump time to catch up with the entry of water.
G. After debris has been removed re-install cover and bolts
H. Be sure there are no leaks around cover
I. Check bilge for removal of water by the bilge pump
J1. Restart engine
J2. Check engine temperature
J3. TRy throttling up normally and check performance
3. If excessive sand is ingested into the jet drive: symptoms of sand entry are
A. Warning buzzer sound
B. Immediate and excessive overheating
4. Open petcocks in exhaust manifolds to check for sand.
5. Remove exhaust manifold cooling hoses - check for sand.
6. Remove end caps on heat exchanger and flush.
7. Replace hoses and heat exchanger end caps.
8. Start engine amd check for jet water flow through exhaust manifolds and hoses.
NOTE: If debris or sand is still present in cooling system repeat steps.