W9 plugs

henryv11 · Apr 18, 2010

Could someone please tell me the correct plug to use for a 1948 W9. Champion if avaliable.
Thank you

Andrew Z · Apr 18, 2010

D18Y or D21's work well

Andrew

glennster · Apr 18, 2010

i dont think they will work. my w-9 takes a bigger plug, the d-18 or autolite 386 for the m are too small for the spark plug hole. i dont remember the number right off hand, i'd have to look and see what they are.

Owen Aaland · Apr 18, 2010

The original heads used plugs with 7/8 inch threads. Later heads use 18 mm thread plugs.

W9 plugs

henryv11

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Andrew Z

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glennster

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Owen Aaland

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