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Includes all seals, o'rings, bearings and gears for the upper unit. Fits most Mercruiser I, R, MR and Alpha I upper units. 1973-1990. For 1.65 gear ratios only. For use with 1-15/16" OD top cap bearing. Uses SEI's exclusive heavy duty gear set, recommended for V8 engines.
GEAR REPAIR KIT Fits Mercruiser Repair Kit 91-106-509K