Spark Plugs
Posted: Sat Dec 09, 2006 4:20 pm
Is it safe to put ChampionXMJ-17 in the M38?
The correct plug choices for the M38 are XMJ-14, WR44, AR5S, 243 or MS35909-1.
The correct choices for the M38A1 are XMJ-17, WR46, AR7S, 2245, or MS35909-2.
You'll notice all the A1 plugs are one or more heat range numbers higher than the M38. In average conditions you can get by with the hotter plugs in the M38 and if she's burning a little oil and starting to foul plugs on you it's a temporary solution.