
[9]
Troubleshooting
Trouble
Probable Cause
Remedy
Vibration
Bent propeller
Straighten and balance propeller
Drive shaft installed improperly
Check that the universal joint forks are in the same plane
(bearing holes in the same direction)
Drive shaft has not been balanced
Have drive shaft dynamically balanced
Engine output shaft and drive input shaft
are not parallel
Adjust engine mount so that shafts are parallel
Worn drive shaft universal joints
Check condition of universal joints
Inadequate stiffness for drive mounting
Stiffen hull mounting flange and hull bottom
Engine mounting loose
Tighten engine mounts
Steering wheel locked
Low on oil
Check tank oil level. Inspect for broken oil lines and loose fittings
Pump not operating
Filter clogged
Air leak in suction line
Repair pump
Replace filter element
Check fittings and tighten where required
Suction hose collapsed
Replace suction hose
Lower unit does not steer
Obstruction jamming lower unit
Remove obstruction
Steering motor key on output shaft
sheared
Remove motor and replace key
Oil pressure gauge does not
respond at above 1000 RPM
Low oil level
Add oil to maintain proper level
Pump not operating
Repair pump as required
Oil leakage
Inspect for broken oil lines and loose fittings
Oil pressure gauge indicates
excessive pressure
Filter clogged
Replace filter element
Pinched or obstructed oil line
Remove obstruction
Oil level drops
Oil leakage
Inspect oil lines and fittings
Propeller shaft seal damaged
Inspect and replace propeller shaft seal if required
Propeller does not turn
Shear pin broken
Replace shear pin
Oil discoloured
Water leakage
Inspect and replace propeller shaft seal
Tighten lower housing bolts
Inspect and replace vertical housing O-Ring seal
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