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8 notch, 3-3/4" Alpha 1 bearing retainer
nut for Mercruiser outdrive Other
upper / lower unit outdrive tools are available Aftermarket upper
gear case retainer nuts are for use with Mercruiser or Alpha One stern drive units

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| # 28350 Alpha 1 bearing retainer nut |
# 28350 Bearing retainer OEM # 983880 $19.29
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