MAC21 Collett Thread size ?

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Tony Jacuzzi

Well-Known Member
Joined
Jun 26, 2002
Messages
1,798
Gents:

What is the thread size on the crank for the MAC21. I am using an Aeromarine but prefer the Octuras and want to pick one up. Also any idea on which other 21 engines are the same thread size as the MAC? Appreciate the help.. Tony J
 
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