Champion QL78YC vs QL78YC?

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Capn Mike

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Dec 10, 2001
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Just ordered from Sparkplugs.com, received my plugs in good time....but, my old plugs had a sub-code of 938-1; the new ones say 938m. Both are QL78YC....is there a difference?<br />It's for my 2000, 200-hp Johnson.
 
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Walker

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Re: Champion QL78YC vs QL78YC?

I think that last 1 is the new designation for "marine". Champion changed the L77JC4's secondary number from 821 to 821-1
 
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Capn Mike

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Re: Champion QL78YC vs QL78YC?

Thanks. It didn't occur to me, but maybe the "m" means marine.
 
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