An open forum to ask members questions about old time spark ignition engines.
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by perlbond » Sun Jul 26, 2009 10:51 pm
I have McCoy 50 series 20. can someone tell me the size of bots for head and crankcase+
Regards
Perlbond
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perlbond
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by Ken McClenahan » Mon Jul 27, 2009 7:55 pm
Number 6 x 32 threads per inch (US size).
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Ken McClenahan
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