What spark plug and what is the gap for an 81 9.8 mercury

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furnaceguy

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Aug 11, 2011
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I just purchased an '81 9.8 mercury and I was wondering if anyone can tell me what spark plugs to use and what the gap should be. There are Champion L77JC4 in there now. I have ordered a manual for the motor.
 
Barnacle_Bill

Barnacle_Bill

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Feb 8, 2004
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Re: What spark plug and what is the gap for an 81 9.8 mercury

NGK

1985-1979 MERCURY 9.8 9.8 hp
Spark PlugPart No.Stock No.Plug GapPhoto
Standard
B9HS-10 #​
3626​
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