Final Drive / Propulsion
5.22
Pum p Alignm ent -- Continued
Troubleshooting
Symptoms
Probable Cause Repair Required
Splines worn or stripped at engine
coupler end of drive shaft or inside
of coupler;
through-hull fitting failure or rapid
wear of bushings in bearing hous-
ing.
Engine misaligned to pump
Loose or broken engine mounts
Engine loose on mount plate
Shim engine mounts
T ighten or replace mounts
T ighten engine to mounting plate
bolts
Splines worn or stripped at impel-
ler end of drive shaft or
inside impeller .
Pump mounting bolts loose
Pump misaligned with hull
(check for gap between hull and
pump housing as shown on Page
5.25).
Remove, re-seal, and install
pump. Torque fasteners.
Determine cause of pump to hull
misalignment:
S Pump mounting studs
installed incorrectly.
S Hull damage from over
tightened or incorrectly installed
studs.
S Scoop improperly installed
(Remove and re-install inlet
scoop). Ride plate should be flush
with bottom of hull.
Excessive drive line vibration Drive shaft runout excessive
Loose or broken engine mounts
Engine loose on mount plate
Pump-to-hull or engine-to-pump
alignment incorrect
Inspect drive shaft runout
T ighten or replace mounts
T ighten engine to mounting plate
bolts
See above
Engine Alignment Inspection (Vertical)
1. If vertical mis-alignment is evident, loosen engine
mount nuts and add or remove shims between
mount plate and rubber engine mounts (equally on
both sides) to raise or lower the coupler.
NOTE: Before shimming engine, be sure misalignment
is not caused by a problem in the pump mounting area,
such as loose mounting fasteners; improperly installed
pump mounting studs; hull damage, etc.
2. To raise coupler: Add shim(s) to the rear mounts or
remove shim(s) from front. To lower coupler:
Remove shim(s) from rear mounts or add shim(s) to
front. The number of shims installed in production is
written next to each mount in permanent marker on
late models.
Front of Watercraft
Engine
Bearing Carrier
Drive Coupler
Alignment Tool Too High (See NOTE:)
Front of Watercraft
Engine
Bearing Carrier Drive Coupler
Alignment Tool Too Low (See NOTE:)
Alignment Shims
PN 7555860
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