Knock knock ??

agefhx

Cadet
Joined
Feb 23, 2002
Messages
25
Have a loud eng knock in a 1974 85hp merc. <br />Split the case expecting to see some dammage and everything looks good! Only thing i found so far was lower crank bearing a little noisy and had a tiny bit of play in it. Is that enough to cause a loud engine knock?
 

12Footer

Fleet Admiral
Joined
Mar 25, 2001
Messages
8,217
Re: Knock knock ??

Yes it is enough. But also check the wrist pins at the piston.
 
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