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Spark plugs, What’s the good spark plug?  I have decided to change out my spark plugs to see if that’ll help start my engine.

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NGK outboard spark plugs

Tom

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My Merc takes NGK and my Evinrude takes Champion. That's what the mfg recommends, that's what I use.

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Go with what the manufacture recommends and you can't go wrong.

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Sparks plugs can make a lot of difference in cranking and running. When I got my Johnson motor it had NGK and it didn't start real good. Looked at the manual and it recommended Champion plugs. Changed them out to recommended plug and made a difference.

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It's not just the brand, match the model number exactly and make sure the gap is right.  Exactly.

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One little side note.  A lot of times manufactures give you two choices, if they do then pick the one suited for your style of operation. 

If you do very little WOT running, then you should run the hotter plug recommended.

If you are mostly running at WOT or make long WOT runs, then you should go with the colder recommended plug.

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