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Hi which is the correct plug for this outboard, it came with QL77J4Cs in it but according to Crowley and Marine engine it might be NKG BUHW 2
Thanks appreciate the help and advice.
Your motor came from the factory with NGK BUHW-2 plugs so I’d stick with them. NGK makes a fine product. If you want to go with Champions, L78V would be the equivalent plug.
http://www.iboats.com/Mercury-NGK-Spark … _id.669910
http://www.sparkplug-crossreference.com … _PN/BUHW-2