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Correct spark plugs for 1997 225 Johnson

"Champion plugs are recommende

"Champion plugs are recommended. QL78YC are the listed plugs, gapped at 0.030"

(QL77JC4 are also listed as are the surface gapped QL16V)

I found no direct NGK equivalent of QL78YC,
BZ7HS-10 are the equivalent of QL77JC4 and BUZ8H are the equivalent of QL16V, if you cannot obtain Champion plugs"
 
Its just my opinion but i have

Its just my opinion but i have always over the 30 years working as a marine mechanic used the plug that the manufacturer has used from new...so stick with champion
 
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