Problem Possible Cause Resolution
Excessive vibration Material obstructing propeller
Bent prop or shaft
Excessive play in shaft log
Bent rudder
Remove material from propeller, shaft,
or rudder by reversing engines. If
necessary, stop engines and cut or
pull material away.
Replace propeller. If vibration con-
tinues, see your Mainship dealer for
service.
Check shaft log for wear. Avoid sud-
den torque changes. See your dealer
for repairs.
Replace. See your dealer for service.
Poor performance Material wrapped around propeller
Damaged propeller; wrong propeller
in use
Run engines in reverse. If necessary
stop engines and cut or pull material
away.
Replace propeller
Troubleshooting
Mainship 34 Trawler Single & Twin • Underwater Gear
6.9
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