Upper Unit Gear Set - 18-2201 - Sierra
Replaces OEM part #
- MERCURY MARINE 43-18410A2
- MERCURY MARINE 43-18411A2
- Most Mercruiser V-8 Drives and Gen II(S/N OK999999 & Below) with 1.5:1 Gear Ratio(Drive Gear = 22 teeth, Driven Gear = 20 teeth). Also fits Mercruiser stern drive models: 225 (S/N 3856268 - 4200499), 260 (S/N 4898730 - 6225576), 898/228 (S/N 4782330 - 6225576), 888 (S/N 3106717 & UP), V8/MR/Alpha One (S/N 6225577 & UP).
- (1) 18-1142 Upper Pinion Bearing - replaces O.E. # 31-32573A1
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