Home › Forum › Ask A Member › 15hp ignition conversion plug change › Re: 15hp ignition conversion plug change
June 2, 2017 at 11:48 pm
#58847
quote pugetsoundboater:
I was told by a member that the NGK plugs to use on the low tension are B7HS not BR7HS. My ’76 9.9 had BR7HS in the motor when i bought it and it ran ok.I thought how weird,NGK’s in an Evinrude,i was expecting to see Champion’s. Now i use the B7HS.
I’ve found some 9.9s and 15s I’ve worked on for friends just don’t idle right for trolling with Champion plugs, and I’ve tried various heat ranges; but with NGKs they magically idle fine. I [posted here a couple years ago about that and several people agreed, but nobody knew why. I also have three 15s (1989 and 1991) that work just fine with Champions.
Dave