Spark Plug Gap

[Wild Bill]

Wondering what I should set my spark plug gap at. I have a 1998 Johnson 150 hp FICHT engine. I have the pinned heads and are using XC12PEPB spark plugs. I read on the forum that they should be set at .030 but someone said .028 would be a better setting. What do you guys with the knowledge of this engine recommend. Answers greatly appreciated.

 

[SparkieBoat]

Re: Spark Plug Gap

I do not know but you can try it both ways..I doubt it will make any noticeable difference..

 

[Wild Bill]

Re: Spark Plug Gap

Thanks Sparkey

 

[ezeke]

Re: Spark Plug Gap

Convention is established at .028, mostly by specialists: http://www.boatsetup.com/PlgIndex.pdf

 

[Wild Bill]

Re: Spark Plug Gap

Thanks ezeke, thats exactly want I needed.

 

[wilde1j]

Re: Spark Plug Gap

They need to be indexed also.