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Ask Dominick Your Own Question
Dominick, Marine Mechanic
Category: Boat
Satisfied Customers: 1009
Experience:  25 Years Experience as Mechanic, 20 Yrs Boat Yard Owner/Mechanic, Factory Certified
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2011 Tahoe Q4 3.0 I/O knocking sound heard more loudly outside

Customer Question

2011 Tahoe Q4 3.0 I/O knocking sound heard more loudly outside at stern than in engine compartment. Sound follows RPMs in gear or in neutral. Please advise.
Submitted: 2 years ago.
Category: Boat
Expert:  Tan replied 2 years ago.
Hello. My name is***** you hear the knocking more when you turn the drive left or right?
Customer: replied 2 years ago.
Not really. sometimes it will be louder turning left and sometimes turning right.
Expert:  Tan replied 2 years ago.
Have you checked the gear lube in the drive at the bottom drain plug? What color is the lube? When was the last time the drive was removed for maintenance? Have you tried greasing the gimbal bearing?