This Lower Unit Seal Kit Compatible with Yamaha will fit all 40 Hp 1984-94 WSM 18-2792.

Replaces OEM# 6H4-W0001-21-00 / 6H4-W0001-20-00

Please be advised that Mercury/Mariner motors DO NOT go by the year they were produced. So please check all information available such as the following to identify your engine to the correct part.

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