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GRAY Model U screen

Old Marine Engine » Gray Motor Co - early 1 and 2 cylinder » GRAY Model U screen « Previous Next »

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Tom G.
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Posted on Wednesday, January 09, 2013 - 07:21 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Underneath the water pump, I found this screen, covering a port down into the crankcase, then one going up, maybe into the exhaust system.
Is this the crankcase breather?
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J.B. Castagnos
Senior Member
Username: jb_castagnos

Post Number: 748
Registered: 07-2002


Posted on Wednesday, January 09, 2013 - 08:46 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

That's a backfire preventor in the transfer port, puts the flame out before it gets to the crankcase.
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Tom G.
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Posted on Wednesday, January 09, 2013 - 10:16 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Interesting... Thanks! I'll have to ponder that tomorrow when I'm out in the garage and can look at the porting!

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