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Spark plug gap for 9.9 hp 4 stroke Yamaha outboard?

Updated: 10/23/2022

Wiki User

∙ 11y ago

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gap should be 0.9mm (0.035")

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∙ 11y ago

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Q: Spark plug gap for 9.9 hp 4 stroke Yamaha outboard?

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Spark plug gap for 9.9 hp 4 stroke Yamaha outboard?

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