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b66 McCulloch 9HP Plug Gap and fuel mixture

bjackzon

New member
"I have acquired a 1966 McCull

"I have acquired a 1966 McCulloch 9HP outboard. Ripped it apart, cleaned points, got it to fire up briefly. My problem is finding information about it. If anybody knows the proper replacement plug and gap setting, plus fuel mixture I would certainly appreciate any help.

Thanks."
 
"You have two options for plug

"You have two options for plugs - Champion RJ12C if you want a resistor plug or J11C, either one gapped at .035"

I don't have a listing anywhere as to what these mixed at. McCulloch was very innovative and had 100:1 mix outboards (as well as oil and fuel injection prototypes back in the 60's).

Until you can get a "for sure" answer, you are probably safe mixing at 40:1.

www.discount-marine-parts.com has original manuals for McCulloch's and an extensive parts supply as well."
 
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