ANNUAL MAINTENANCE
19-5
Check the propeller shaft
coupling alignment
Step 1: Ensure the engine is OFF and dis-
connect the engine safety starting switch. Be
sure that the throttle/shift control lever is in
neutral. The engine must be cool.
Step 2: Open the engine box and locate
the propeller shaft coupling.
Step 3: Remove the coupling bolts and slide
the coupling apart only slightly so that the pilot
flange on the propeller shaft side is still seated
in the pilot bore of the transmission side.
Step 4: Using a feeler gauge, measure the gap between the coupling halves at four places. Rotate the coupling
flanges together one complete revolution, stopping every 90
o
to check clearance with the feeler gauge.
Step 5: Alignment is satisifactory when the flanges are parallel within 0.003 inch.
Step 6: If the alignment is not satisfactory, an adjustment must be made. Special tools and procedures are
required for proper adjustment and should be made only by a trained technician. See your MasterCraft dealer.
Step 7: If alignment is satisfactory, re-install the flange bolts and tighten securely.
Step 8: Water test to ensure that there is no vibration. If a vibration is noticeable, see your MasterCraft dealer
immediately.
Inspect the exhaust flaps for damage
Step 1: Ensure the engine is OFF and disconnect the engine safety starting
switch. Be sure that the throttle/shift control lever is in neutral.
Step 2: Inspect the exhaust flap hinge for signs of deterioration. Replace the
flap if necessary.
Lubricate the steering system
Because this process should be completed while all moving components
of the drive train are NOT in motion, we recommend you do this while the
boat is out of the water.
Step 1: Ensure the engine is OFF and disconnect the engine safety
starting switch. Be sure that the throttle/shift control lever is in neutral.
The engine must be cool.
Step 2: Remove the access panel in the rear trunk compartment.
Step 3: Turn the steering wheel so that the maximum amount of steer-
ing cable is seen.
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