MAINTENANCE
2.22
2004 Four Stroke PWC Service Manual
Cooling Water Pickup Screen
Inspect the screen in the pump stationary nozzle for de-
bris and clean if necessary.
Fasteners
Inspect all fasteners in the pump area and make sure
they are tight. These include the steering nozzle mount-
ing bolts, steering cable bolt, trim nozzle mounting bolts
(where applicable), and all reverse mechanism fasteners
(where applicable). Inspect pump mounting nuts and ex-
tension housing bolts. Refer to specific torque values
listed in the General Information section or Final Drive/
Jet Pump section.
Scoop / Ride Plate / In take Grate
Verify fastener torque on the scoop, ride plate, and intake
grate. Inspect all components for damage. Inspect the
scoop sealing area for signs of black exhaust trails which
indicate a leak in the sealant around the scoop. Even a
small leak will ventilate the pump area, creating cavita-
tion of the pump and reducing performance. If a leak is
evident, remove the scoop and re-seal. Refer to Final
Drive/Jet Pump section for procedures. Excess silicone
sealant can be trimmed until flush with edges.
Impeller Clearance
W ARNING
Be sure the lanyard cord and lock plate are removed from
the engine stop switch to kill the ignition or severe injury
could result.
1. Remove intake grate.
2. Use a feeler gauge to measure impeller clearance
along each blade in three spots. If measurement
exceeds service limit, replace impeller. If clearance
is excessive with a new impeller, the pump housing
must be replaced.
Screen
Ride Plate
Impeller
Drive Shaft
Intake
Grate
Impeller Clearance
Standard .002-.008″.05-.20 mm)
Service Limit .020″ (.5 mm)
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