Gapping spark plugs

[Dm82]

Hello all,
I just picked up new plugs for my 69 johnson 100 hp. In my manual it calls for surface cap plugs. When I went to buy the new plugs the guy there told me not to use those, but try champion QL_____? Forget the actually number but know it starts with ql for quite running. So my question is what do I gap these at? Doesn't say in my manual. Thanks

 

[gsyfishy]

Re: Gapping spark plugs

If they are ql77jc4, most, and I repeat most are gapped at 0.30, but I would suggest a manual to be sure.

 

[tashasdaddy]

Re: Gapping spark plugs

gapped at .030. http://www.boatsetup.com/Spark Plug Chart 2007 BRP.pdf

 

[Vic.S]

Re: Gapping spark plugs

The Q incidentally indicates that they are low resistance, inductively suppressed plugs.

The reasons for using low resistance inductive suppression are discussed HERE