Raptor 400 Spark Plug Tune-up

[larry_arizona]

300 hours. Truck engine greater than jet ski engine


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[haknslash]

I just realized the 300 hours column is also the annual so I guess replace them each year? How long do you guys generally go before replacing?

[parrothd]

I just realized the 300 hours column is also the annual so I guess replace them each year? How long do you guys generally go before replacing?

I replaced them at 600hours, I had a misfire check engine light from a bad spark wire. Made sense to replace everything.

[larry_arizona]

I just realized the 300 hours column is also the annual so I guess replace them each year? How long do you guys generally go before replacing?

The way I would interpret 300 hours or annually for spark plugs is if you do over 300 hours in a season, just wait and do it at the end of season.




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[haknslash]

I’m only at 40 hours so wondering if it’s a waste to even change them?

[larry_arizona]

I’m only at 40 hours so wondering if it’s a waste to even change them?

Absolutely should NOT change them at 40 hours.




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[MJHSupra]

You should have many more seasons at 40 hours for 1 year.

Manual @ 300 hours which is the same time as the fluid changes.



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[jason1973]

my dealer said not til after 300 hours and if it still runs good don't worry about it until it doesn't.

[SorryCharlie]

That's what my dealer said at 300 hours, you don't need to change the plugs. Of course, my dealer is pretty inept.

[torrasmussen22]

Thank you for the process. Very enligthening indeed! Also what is the max speed on it with the mods?