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Item Description Mercury Part Number 20997A1 Which looks like some sort of Shift Shaft or throttle part or possibly stern drive shift shaft
0580106 (stamped inside)
1989 Various 35hp
"GDE" models & subsequent years (1989 & 1990) used cylinder head cover 0986384 / 986384 which 984880 does supersede too
MerCruiser MR Alpha One 1 Lower Unit 818763A10 73020-C1 Bearing Carrier Gen II Engine Mounts Item Description Mercury Part NumberItem Details MerCruiser Sterndrive Alpha One Lower Unit Bearing Carrier Used in MerCruiser R MR & Gen I (1983 1990) & also Gen II lower units 1991 & Up However, You just need to inspect the casting number to see if the one you are replacing is the right one. This type was the later type used mostly newer stuff using tab washer 14 18323 on Gen I & Gen II Standard Rotation lower units. This will only replace bearing carriers with either 818763C1