Spark Plug specifications

[Chris Haraway]

Does anyone know the proper gap for the plugs on a 1960 Johnson Seahorse 10hp? Or where I could get the information?

 

[Mike D]

NGK Site

Chris.Check it out.They show it at a .030http://www.ngksparkplugs.com/good luck,mike d

 

[Ray Bowles]

Chris, .030 works well and while you're at it

make very sure the spark plug wire ends are not corroded or damp and that the rubber boots are still soft. Check both ends on the wires.If you should have trouble with oil fouling the plugs open the gap to .032 or even up to .035.In all the racing we've done I've found NGK or ND plugs to be the absolute best. Any NAPA or similar store should have them.Ray

 

[Chris Haraway]

Thanks for the help, guys.

Thanks.