Home › Forum › Ask A Member › 1974 Evinrude 9.9 won’t idle at low RPMs, need help › Re: 1974 Evinrude 9.9 won’t idle at low RPMs, need help
April 25, 2016 at 7:15 am
#35451
After some "research" today with some of our 9.9/15HP experts here I found that the Champion UL81J is no longer made ,it’s now UL81C. NGK equivelent is B7HS. That’s what I’m now looking for ,but currently have BR7HS in mine. What plugs does your Bro in Laws ’75 have in there ? Just curious. Other forums I read in the past say go with NGK
So far the consensus by the experts say NGK B7HS.
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