Johnson 70hp

cdninus · Aug 26, 2003

I own an outboard Johnson 70 hp. Purchased it in 1992. Can anyone tell me what that spark plug gap should be ??

wikelam · Aug 26, 2003

Re: Johnson 70hp

sorry, my book only goes to 1990

cdninus · Aug 26, 2003

Re: Johnson 70hp

Thanks for the effort !!

The Marine Doctor · Aug 26, 2003

Re: Johnson 70hp

The plug gap is .030 TMD

bubbakat · Aug 26, 2003

Re: Johnson 70hp

L77JC4 or QL77JC4 gaped at 30 on all vro/oms equipped motors the "QL" supressor plug is recommended

cdninus · Aug 26, 2003

Re: Johnson 70hp

Thanks to both of you. This forum REALLY helps if you don't have a manual ......

Dhadley · Aug 27, 2003

Re: Johnson 70hp

Make sure they are Champion plugs only! Good luck!