Section 06 STEERING AND PROPULSION
Subsection 03 (JET PUMP)
GENERAL
During assembly/installation, use torque values
and service products as in the exploded views.
Clean threads before applying a threadlocker. Re-
fer to
SELF-LOCKING FASTENER
and
LOCTITE
APPLICATION
at the beginning of this manual for
complete procedure.
WARNING
Torque
wrench
tightening
specifications
must be strictly adhered to.
Locking devices (e.g.: locking tabs, elastic
stop nuts, self-locking fasteners, cotter pins,
etc.) must be replaced.
JET PUMP MAIN COMPONENTS
6
3
4
5
2
1
smr2006-027-011_a
TYPICAL
1. Nozzle
2. Venturi
3. Jet pump housing
4. Wear ring
5. Impeller
6. Stator
INSPECTION
IMPELLER CONDITION
Condition of impeller, impeller boot and wear
ring can be quickly checked from underneath the
watercraft. With the vehicle on the trailer, use
a flashlight to visually inspect them through the
inlet grate.
smr2007-028-001_a
TYPICAL — UNDERNEATH HULL
1. Impeller
2. Impeller boot
3. Wear ring
IMPELLER/WEAR RING
CLEARANCE
This clearance is critical for jet pump performance.
To check clearance, remove jet pump.
Using a feeler gauge, measure clearance between
impeller blade tip and wear ring. Measure each
blade at its center.
smr2006-027-008
MODEL
MAXIMUM WEAR
CLEARANCE
mm (in)
All models
0.35 (.014)
IMPELLER SHAFT RADIAL PLAY
Radial play is critical for jet pump life span.
To check radial play, remove jet pump.
Make sure impeller shaft turns freely and
smoothly.
1. Retain housing in a soft jaw vise making sure
not to damage housing lug.
2. Set a dial gauge and position its tip onto metal
end, close to the end of the impeller hub.
3. Move shaft end up and down. Difference be-
tween highest and lowest dial gauge reading is
radial play.
smr2009-039
409
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