Re: 1974 Evinrude 9.9 won’t idle at low RPMs, need help

[hotpickle]

quote pugetsoundboater:

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.

Not sure, will check this week. I had read there was an issue with the spark plug being out of production. I plan on picking up the NGK BR7HS this week and trying it out. Problem is that our motors are out at the in laws place so we only get out there once or twice a week and I didn’t even think to check what type of spark plugs they have (part of the learning curve I guess).

How do you find the NGK BR7HS works in yours? What year is it? Is it having a similar problem to mine?