What type of Spark Plug should be used?

[lajmap1204]

Hello. I have a 1969 85hp Johnson Hydroelectric serial number J3035751 model number 85esl69s. Does anyone know what plug should be used and what gap it should have. Thanks in advance for your help.

 

[steelespike]

Re: What type of Spark Plug should be used?

My info says prior to 86 is L77J4

 

[ezeke]

Re: What type of Spark Plug should be used?

Think you want a surface gap Champion L 76V. You had better check that with a dealer.

 

[marinemech1]

Re: What type of Spark Plug should be used?

l-77jc4 or ql-77jc4 champion plugs<br />surface gapped may work but motor may run funny

 

[ezeke]

Re: What type of Spark Plug should be used?

Thanks for jumping in there marinemech1. Is that gap .03 ?

 

[lajmap1204]

Re: What type of Spark Plug should be used?

Thanks for the help got new plugs, installing new amplifier pack today hopefully will have good spark!!!