PROPELLER SHAFT MODELS
SERVICE MANUAL NUMBER 22
90-860074--1 FEBRUARY 2002 Page 8B-7
Checks Made with Propeller Shaft Removed from Boat
1. Check propeller shaft for straightness. Rotate at least one complete turn and check at
three or four places. If dial indicator deflects over 0.1 mm (0.004 in.), replace shaft.
a
b
c
a-V-Blocks
b-Dial Indicator
c-Shaft
2. Ensure that bore of coupling is 90 degrees from coupling flange. Rotate at least one
complete turn. Replace coupling if needle moves.
a
b
c
d
a-V-Blocks
b-Dial Indicator
c-Coupling Flange
d-Shaft Against Block to Prevent Fore and Aft Movement
Strut
Refer to boat manufacturer’s service manual for alignment and replacement. Normally, the
shaft should be centered in the cutlass bearing. Shims (placed between the strut and hull)
are used to align the strut to the shaft.
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