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harmonic ballancer

To: mgs@Autox.Team.Net (IPM Return Requested)
Subject: harmonic ballancer
From: William G Abbott <william.g.abbott#064#boeing.com@mail.mdc.com>
Date: Wed, 23 Sep 1998 15:10:31 -0700
Does anyone have a used harmonic ballancer for a 77B, 
My spare engine (77)has a large chip missing harmonic ballancer.  
I may have to use this short block a while when I rebuild the 74 B operational 
engine
Presently I have slight bearing noises coming out if the lower end engine
during cold starts of my 74B motor.  
Does anyone know if the 74B and the 77B harmonic ballancers are 
interchangeable?
I bet the timing marks are different?

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