which sparkplug ?

[canman]

hi all .could someone tell me what the difference is from a QL77JC4 and a QLV4 sparkplug . thankyou .

 

[ezeke]

Re: which sparkplug ?

I don't find QLV4 listed for a J/E motor, but the letter V denotes a champion surface gap plug.

The QL77JC4 is not a surface gap. It is generally preferred except for continuous high speed use.

http://www.boatsetup.com/SparkPlugChart.pdf