TROUBLESHOOTING SERVICE MANUAL NUMBER 28
Page 1C-4 90-863160 MAY 2000
Gear Housing Noise
Cause Special Instructions
Metal particles in drive unit lubricant.
Disassemble, clean and inspect and
replace necessary components. (Refer
to SECTION 3B, 3C or 3D)
Propeller incorrectly installed.
Inspect mounting hardware. Install
propeller correctly.
Propeller shaft bent.
Inspect and replace if necessary.
(Refer to SECTION 3B, 3C or 3D)
Incorrect gear shimming.
Check gear housing backlash and
pinion gear height. (Refer to SECTION 3B,
3C or 3D)
Worn or damaged gears and/or
bearings caused by impact,
overheating or improper shimming.
Disassemble, inspect and replace. (Refer
to SECTION 3B, 3C or 3D)
Drive Shaft Housing Noise
Cause Special Instructions
Engine flywheel housing contacting
inner transom plate or exhaust pipe.
Determine cause for interference
(loose engine mounts, transom too
thin, etc.) and correct as necessary.
Propeller with untrue or out-of-balance
blades.
Repair or replace, as required.
Abnormal sterndrive operation.
Instruct operator on proper operating
technique.
U-joint cross and bearing assembly
retaining rings improperly installed or
of incorrect size.
Make sure that proper thickness
retaining rings are used and that rings
are fully seated in u-joint bearing cap
grooves. (Refer to SECTION 3A)
Excessive side-to-side play in U-joint
cross and bearing assemblies.
Replace cross and bearing assembly.
U-joint bearing caps contacting U-joint
bellows retention sleeve.
Make sure proper cross and bearing
assemblies are used. If interference is
severe, replace cross and bearing
assembly and / or sleeve assembly.
U-joint cross and bearings rough.
Replace assemblies. Signs of scoring,
galling or roughness are the result of lack
of lubricant. (Refer to SECTION 3A)
O-rings missing or flattened out on
U-joint shaft causing shaft to rattle
against ID of gimbal bearing.
Install new o-rings. (Refer to SECTION
3A)
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