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What is the spark plug for mercury 50 hp 1974?

Anonymous

∙ 16y ago

Updated: 10/22/2022

The Merc's seem to perform better with NGK brand plugs installed. The 1974 model, 50 hp, good ol in-line 4, requires an NGK BUHW. If you go with a Champion brand plug, originally installed, use a L76V. Both plugs are perma-gap type, so no adjustment required.

Wiki User

∙ 16y ago

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