What are the correct spark plugs for a Johnson '93 15hp?

[johnsland8]

I looked in the NGK and the Champion books and neither listed a 1993 15hp motor except for the commercial version. I'm pretty sure, based on the description in the manual and the model number (J15RLETB), that mine is not a commercial motor. They listed thru '92 and then from '94 on but no '93.. what gives? Which plugs should I use? I looked them up on the Evinrude parts look up and it gave 4 optional plug choices. It ran so well before the plug issue that I just replaced it with the plugs that were in there, but they were not listed anywhere in the books for any years of my motor. I used a BR9HS-10 NGK.

Does anyone know what the proper plugs are?

Thanks!

 

[tashasdaddy]

Re: What are the correct spark plugs for a Johnson '93 15hp?

Champion QL77JC4 gapped at .030. if you do a lot of slow speed running and trolling open the gap to .035 it will cut down on fouling.