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Section 09 PROPULSION SYSTEM
Sub-Section 01 (JET PUMP)
09-01-3
GENERAL
The impeller housing, venturi and nozzle are ei-
ther made of aluminum or plastic, depending on
which model of watercraft.
Plastic is a light weight material and it is not af-
fected by corrosion.
All watercraft powered by a 717 or 787 engines
have a stator made of bronze which offers greater
strength than aluminum.
JET PUMP INSPECTION ON
WATERCRAFT
To work on watercraft, securely install it on a
stand. Thus, if access is needed to water inlet ar-
ea, it will be easy to slide underneath watercraft.
Working on the water intake grate, jet pump, ride
shoe, etc., can be done by simply blocking the
rear of watercraft above work stand.
A lift kit can be used to install watercraft on a
stand. Refer to the following chart.
1. Lift kit
2. Work stand
Impeller Condition and Impeller / Wear
Ring Clearance
Impeller Condition
Condition of impeller, boot and ring can be quickly
checked from underneath of the watercraft. Re-
move grate and look through water inlet opening.
1. Boot with ring
Impeller / Wear Ring Clearance
This clearance is critical for jet pump perfor-
mance.
Clearance can be checked from water inlet open-
ing or from venturi side. However, the last meth-
od requires more work.
To check clearance from water inlet side remove
inlet grate.
To check clearance from venturi side, remove
venturi /nozzle assembly as described in Oil In-
spection in this section.
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 in-
spect impeller and wear ring. Renew worn parts.
LIFT KIT P / N WATERCRAFT MODEL
295 100 012 SP / XP series and HX
295 100 013 GTS / GTI models
F01J42A
1
2
F01J0DA
1
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