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What is the correct spark plug for 1968 3hp 2cyl Johnson outboard motor?

Updated: 10/20/2022

Wiki User

∙ 15y ago

Best Answer

David Underhay The decal on my 1968 3hp Johnson says use either of: Champion J4J, AC M42K, Autolite A21X sparkplugs. You may have to find the current equivalents

Wiki User

∙ 15y ago

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What is the correct spark plug for 1968 3hp 2cyl Johnson outboard motor?

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