Section13PROPULSION
Subsection 01 (JET PUMP)
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1
TYPICAL
1. Inspect impeller and boot
Impeller/Wear Ring Clearance
This clearance is critical for jet pump performance.
Clearance can be checked from water inlet open-
ing or from venturi side. However, the last
method requires more work.
To check clearance from water inlet side, remove
inlet grate.
To check clearance from venturi side, remove ven-
turi/nozzle assembly as described in OIL INSPEC-
TION in this subsection.
Using a feeler gauge with 30 cm (12 in) blades,
measure clearance between impeller blade tip
and wear ring. Measure each blade at its center.
Clearance should not exceed 1.0 mm (.040 in). If
clearance is greater, disassemble jet pump and
inspect impeller and wear ring. Renew worn
parts.
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TYPICAL — MEASURING FROM WATER INLET SIDE
1. Feeler gauge
F01J0FA
1
TYPICAL — MEASURING FROM VENTURI SIDE
1. Feeler gauge
Oil Inspection
Remove:
– reverse gate cable
– VTS rod (if so equippped)
– steering cable
– screws no. 19 retaining venturi to the housing.
Pull venturi.
Remove plug from cover.
smr2004-Complete Line Up 617
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