1993 40hp knock

hardly

Cadet
Joined
Oct 11, 2009
Messages
9
Had someone look at my motor today, told me it had a knock. I thought they all sound this way like a rattle when you rev up and down. So he moved the fly wheel by hand and you do hear a knock or click before it catches. Is this normal?
 

bktheking

Vice Admiral
Joined
Jul 29, 2008
Messages
5,057
Re: 1993 40hp knock

Not usually, a knock is not normal in any motor. There are different ways to check for play without tearing it apart, search the forums for diagnosis info.
 

hardly

Cadet
Joined
Oct 11, 2009
Messages
9
Re: 1993 40hp knock

So has someone turned their flyweel back & forth and heard this click or knock or do I have a big problem. The motor runs great but he said he would have to go into it may cost up to $2500 to rebuild
 

bktheking

Vice Admiral
Joined
Jul 29, 2008
Messages
5,057
Re: 1993 40hp knock

Usually a knock is heard while the motor is running, you may just be hearing the motor internals moving inside while turning the flywheel. A knock is evident, if you've owned this thing for a while and it sounds the same as always chances are its fine. If you are worried about it take it to another mechanic and get a second opinion.
 
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