Spark Plugs 1975 70hp Evinrude

[mav6759]

Can you use automotive spark plugs in place of marine spark plugs.

mav

 

[mrcj001]

Re: Spark Plugs 1975 70hp Evinrude

Use champion QL77JC4 for your motor.

 

[mav6759]

Re: Spark Plugs 1975 70hp Evinrude

Am I missing something, I pulled the spark plugs and there is nothing on these plugs to gaps. Are there plugs out there that you don't have to gap.
QL16V is what I pulled out.

 

[searay175snyder]

Re: Spark Plugs 1975 70hp Evinrude

gap them at 32 to 35 the normal i did mine like that and she is just fine rember to put the wires on the right way also

 

[Haffiman]

Re: Spark Plugs 1975 70hp Evinrude

QL16V is a surface gap plug (no side electrode) that replaces in a lot of cases the old UL plugs.
Mainly same characteristics, but better idling.
OK for hard driving and commercial use.
Change to (Q)L77JC4 as mentioned above.