[Public-List] Atomic IV making strange noise

mahseer at kos.net mahseer at kos.net
Mon Oct 3 13:29:28 PDT 2011

I suspect that the auxillery drive gear assembly has dry bushings, this
assembly is oiled through oil splashing from the crank and is drained
through a small hole drilled in the casting.  Moyer Marine has a fix to
this by sealing the current hole and drilling a new one higher up so oil
is retained in the housing.

John Boor

> Hello friends -
> A good friend whose boat is fitted with an A4 engine is having an
> issue....
> The symptom is quite a distinct screeching or scratching sound that starts
> when the engine fires up but stops after about 20 or 30 seconds.   I¹ve
> only
> heard the sound over a cell phone but it¹s most certainly there.
> Anybody have an idea of what this might be?  I thought a good explanation
> might be a loose belt that stops slipping after it got heated by friction,
> but after hearing it yesterday over the phone I think it is more of a
> metal
> on metal scratching sound.
> Gord #426 Surprise
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