Bosch WSR6F in my Stihls........
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Bosch WSR6F in my Stihls........
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Bosch WSR6F in my Stihls........
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I have never had a problem with any plug brand. I mostly use NGK or Bosch, because thats what my dealer stocks.
Of course I am not one to change spark plugs. I have one 372 that i bought in 03 that has the original plug in it.
That sounds like the surface gap plugs in my old mercury outboard .I'm sorry about sounding rude here, because I'm not laughing about your engines being destroyed from the plugs, instead I am just remembering something. Champion plugs are the whole reason why Nascar no longer uses a spark plug with a ground electrode. Don't get me wrong here... Other plugs were doing the same thing, but Champions acounted for 90 some % of "problem childs"... Now they use plugs with "of course" the center electrode, but instead of having any ground electrodes, they have a ring that basically just closes up the gap some at the base of the plug.
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