Mercruiser Upper Unit Gear Sets

Upper Unit Gear Set - 18-2201 - Sierra
Your Price: $343.35
Save: $153.30
(30% Off $496.65)
Part # 18-2201 ValueShip™ Eligible
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Replaces OEM part #
  • MERCURY MARINE 43-18410A2
  • MERCURY MARINE 43-18411A2
For:
    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).
Kit Includes:
    (1) 18-1142 Upper Pinion Bearing - replaces O.E. # 31-32573A1
Upper Unit Gear Set - 18-2203 - Sierra
Your Price: $289.40
Save: $39.60
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Replaces OEM part #
  • MERCURY MARINE 43-45814A5
For:
    Mercruiser 6 Cyl. Inline (S/N K999999 & BELOW) with 1.65:1 Gear Ratio (Drive Gear = 24 teeth, Driven Gear = 24 teeth)
Upper Unit Gear Set - 18-2204 - Sierra
Your Price: $238.97
Save: $70.03
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Part # 18-2204 ValueShip™ Eligible
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Replaces OEM part #
  • MERCURY MARINE 43-75325A3
For:
    Mercruiser V-6 and 470/485 (4 Cyl. etc.) and Gen II (S/N K999999 & BELOW) with 1.84:1 Gear Ratio (Drive Gear = 17 teeth, Driven Gear = 19 teeth).
Upper Unit Gear Set - 18-2205 - Sierra
Your Price: $236.49
Save: $109.22
(31% Off $345.71)
Part # 18-2205 ValueShip™ Eligible
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Replaces OEM part #
  • MERCURY MARINE 43-55778A3
For:
    120/140 (S/N 2791957 & UP) and Gen II (S/N K999999 & BELOW) with 1.98:1 Gear Ratio (Drive Gear = 20 teeth Driven Gear = 24 teeth).
Upper Gear Kit - 18-6350 - Sierra
Your Price: $390.10
Save: $33.90
(7% Off $424.00)
Part # 18-6350 ValueShip™ Eligible
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Replaces OEM part #
  • MERCURY MARINE 43-853640A2
For: Mercruiser Gen II Upper (1998-up) Serial Number OL10040-UP, for 1.62/2.00:1 gear ratios (24-24 Teeth).
Upper Gear Kit - 18-6351 - Sierra
Your Price: $393.48
Save: $30.52
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Part # 18-6351 ValueShip™ Eligible
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Replaces OEM part #
  • MERCURY MARINE 43-853641A2
For: Mercruiser Alpha I (Gen II) (1998-up) Serial Number range 0L100040-UP, for gear ratios 1.47:1 (20-22 Teeth).
Upper Gear Kit - 18-6352 - Sierra
Your Price: $400.92
Save: $23.08
(5% Off $424.00)
Part # 18-6352
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Replaces OEM part #
  • MERCURY MARINE 43-853642A2
For: Mercruiser Alpha I (Gen II ) (1998-up) Serial Number range 0L100040-up, with gear ratios 1.94:1, 2.40:1 (20-24 Teeth)
Upper Gear Kit - 18-6353 - Sierra
Your Price: $355.90
Save: $33.10
(8% Off $389.00)
Part # 18-6353 ValueShip™ Eligible
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Replaces OEM part #
  • MERCURY MARINE 43-853643A2
For: Mercruiser Alpha I Gen II, Serial Number range 1998-up/0L00040-UP, with Gear ratios 1.81:1 (17-19 Teeth).
Sierra
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