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Correct plugs for 1977 55 hp Magnapower II

trinity

New member
Just bought the boat. Only fir

Just bought the boat. Only firing on one cylinder. Pulled the plugs and the lower plug is hitting the piston. Plugs are NGK BUHX. I think the plugs are just a little too long. Piston looks ok from what I can see through the spark plug hole. Just a couple small divets. Anyone know the correct plugs ?
 
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