Alpha One Gen.2 Drive parts until 1997

MerCruiser Alpha One Gen.2 Drive spare parts (Z-drive parts upper unit)

In this category you will find spare parts for the upper drive unit of the MerCruiser Alpha One Gen.2. Ideally, they are assigned by serial number and year of manufacture (e.g. OD469859-0K9999 / 1991-1997) as well as the MerCruiser OEM reference number. The range includes drive shaft positions and joint parts (yoke/joint socket) for Alpha One Gen.2. For workshops and resellers, we recommend direct purchase/quick order by part number to minimize downtimes during repairs.

 Top gear set for Mercruiser Alpha One Gen.2, MD853640A2
Top gear set for Mercruiser Alpha One Gen.2, MD853640A2
article nr.02888

24 teeth each, ratio 1.62 and 2.00
Mercruiser ref. no. 853640A2

297,42 EUR / Set
incl. 19% VAT
Lieferung Thu 20. Aug - Mon 24. Aug 2026 **
24 months statutory warranty
Adjustment disk set for Mercruiser Alpha, MD45691A1
Adjustment disk set for Mercruiser Alpha, MD45691A1
article nr.03859

Adjustment disk set (shim) for ball bearing 31-61100A1.
Mercruiser no. 15-45691A1

36,78 EUR / Set
incl. 19% VAT
Lieferung Thu 20. Aug - Mon 24. Aug 2026 **
24 months statutory warranty
(Max quantity: 1 Set)
Original spare part
Adjustment disk set for Mercruiser, 32563A1
Mercury-Mercruiser-Quicksilver
Adjustment disk set for Mercruiser, 32563A1
article nr.03860

Adjustment washer set (shim) for ball bearing 31-32575T1.
Mercruiser No. 15-32563A1

10,64 EUR / Set
incl. 19% VAT
Lieferung Thu 20. Aug - Mon 24. Aug 2026 **
24 months statutory warranty
Original spare part
Adjustment disk set for Mercruiser, 36178A02
Mercury-Mercruiser-Quicksilver
Adjustment disk set for Mercruiser, 36178A02
article nr.03873

Mercruiser ref. no. 15-36178A02

12,06 EUR / Set
incl. 19% VAT
Lieferung Thu 20. Aug - Mon 24. Aug 2026 **
24 months statutory warranty
Original spare part
Cardan joint bracket short for Mercruiser / OMC, 46020T02
Mercury-Mercruiser-Quicksilver
Cardan joint bracket short for Mercruiser / OMC, 46020T02
article nr.04181

Cardan joint bracket with short shaft (yoke).for Alpha One, Alpha One Gen. II
Mercruiser no. 46020T02

180,48 EUR
incl. 19% VAT
Lieferung Thu 20. Aug - Mon 24. Aug 2026 **
24 months statutory warranty
Original spare part
Joint socket for Mercruiser Alpha One Gen.2, Vazer and Bravo, 865503T
Mercury-Mercruiser-Quicksilver
Joint socket for Mercruiser Alpha One Gen.2, Vazer and Bravo, 865503T
article nr.05247

Drive socket for universal joint shaft. Mercruiser no. 865503T

103,95 EUR
incl. 19% VAT
Lieferung Thu 20. Aug - Mon 24. Aug 2026 **
24 months statutory warranty
Original spare part
Universal joint for Mercruiser Alpha One Gen.2 up to 2001, 805536A2
Mercury-Mercruiser-Quicksilver
Universal joint for Mercruiser Alpha One Gen.2 up to 2001, 805536A2
article nr.03878

Mercruiser ref. no. 8055361, 805536A1, 805536A2

123,16 EUR
incl. 19% VAT
Lieferung Thu 20. Aug - Mon 24. Aug 2026 **
24 months statutory warranty
Original spare part
Universal joint shaft compl. for Mercruiser Alpha from 1998, 864281A2
Mercury-Mercruiser-Quicksilver
Universal joint shaft compl. for Mercruiser Alpha from 1998, 864281A2
article nr.05238

Universal joint shaft complete (U-joint assembly) for Z-drive.
Mercruiser Ref. no. 864281A2

771,95 EUR
incl. 19% VAT
Lieferung Thu 20. Aug - Mon 24. Aug 2026 **
24 months statutory warranty
Universal joint shaft compl. for Mercruiser Alpha up to 1997, MD814819A2
Universal joint shaft compl. for Mercruiser Alpha up to 1997, MD814819A2
article nr.02885

Universal joint shaft complete (U-joint assembly) for Z-drive.
Mercruiser Ref. no. 814819A2

323,07 EUR
incl. 19% VAT
Derzeit nicht verfügbar **
24 months statutory warranty
Original spare part
Z-drive shaft yoke long for Mercruiser Alpha One Gen 2, 864281A01
Mercury-Mercruiser-Quicksilver
Z-drive shaft yoke long for Mercruiser Alpha One Gen 2, 864281A01
article nr.04396

Mercruiser no. 864281A01

287,30 EUR
incl. 19% VAT
Lieferung Thu 20. Aug - Mon 24. Aug 2026 **
24 months statutory warranty
Original spare part
Z-driveshaft yoke short for Mercruiser Alpha One Gen 2 from 98, 864282T
Mercury-Mercruiser-Quicksilver
Z-driveshaft yoke short for Mercruiser Alpha One Gen 2 from 98, 864282T
article nr.09081

Mercruiser no. 864282T

181,39 EUR
incl. 19% VAT
Lieferung Thu 20. Aug - Mon 24. Aug 2026 **
24 months statutory warranty
 Adjustment disk set for Mercruiser Alpha One, 45691A1
Adjustment disk set for Mercruiser Alpha One, 45691A1
article nr.05571

Adjustment disk set (shim) for ball bearing 31-61100A1.
Mercruiser No. 15-45691A1

32,61 EUR / Set
incl. 19% VAT
Lieferung Thu 20. Aug - Mon 24. Aug 2026 **
24 months statutory warranty
(Max quantity: 1 Set)
 Chip ring (shim) for Mercruiser, MD8M0124132
Chip ring (shim) for Mercruiser, MD8M0124132
article nr.03886

Mercruiser ref. no. 8M0124132, 71013

12,13 EUR
incl. 19% VAT
Lieferung Thu 20. Aug - Mon 24. Aug 2026 **
24 months statutory warranty
 Joint socket for Mercruiser / OMC / Volvo Penta, MD393831
Joint socket for Mercruiser / OMC / Volvo Penta, MD393831
article nr.03879

Drive socket for universal joint shaft. Mercruiser ref. no. 393831, Volvo Penta ref. no. 3850813

63,71 EUR
incl. 19% VAT
Lieferung Thu 20. Aug - Mon 24. Aug 2026 **
24 months statutory warranty
Original spare part
Ball bearing for Mercruiser Alpha with 1.5 ratio, 32573A1
Mercury-Mercruiser-Quicksilver
Ball bearing for Mercruiser Alpha with 1.5 ratio, 32573A1
article nr.03870

Mercruiser no. 31-32573A1, OMC ref. no. 775504

67,57 EUR / Piece
incl. 19% VAT
Lieferung Thu 20. Aug - Mon 24. Aug 2026 **
24 months statutory warranty
Ball bearing for Mercruiser Alpha with 1.5 ratio, MD32573A1
Ball bearing for Mercruiser Alpha with 1.5 ratio, MD32573A1
article nr.09727

Mercruiser no. 31-32573A1, OMC ref. no. 775504

54,41 EUR / Piece
incl. 19% VAT
Lieferung Thu 20. Aug - Mon 24. Aug 2026 **
24 months statutory warranty
Original spare part
Gear set Ratio 1.50 for Mercruiser Alpha, 18411A2
Mercury-Mercruiser-Quicksilver
Gear set Ratio 1.50 for Mercruiser Alpha, 18411A2
article nr.03866

Upper gear set Ratio 1.50 (20-22).
Mercruiser ref. no. 18410A2, 43-18411A2, 59832A2

692,52 EUR / Set
incl. 19% VAT
Lieferung Thu 20. Aug - Mon 24. Aug 2026 **
24 months statutory warranty
Original spare part
Gear set Ratio 1.65 for Mercruiser Alpha, 45814A5
Mercury-Mercruiser-Quicksilver
Gear set Ratio 1.65 for Mercruiser Alpha, 45814A5
article nr.03867

Upper gear set Ratio 1.65 (24-24).
Mercruiser No. 43-45814A5

461,73 EUR / Set
incl. 19% VAT
Lieferung Thu 20. Aug - Mon 24. Aug 2026 **
24 months statutory warranty
Original spare part
Gear set Ratio 1.84 for Mercruiser Alpha, 75325A3
Mercury-Mercruiser-Quicksilver
Gear set Ratio 1.84 for Mercruiser Alpha, 75325A3
article nr.03868

Upper gear set Ratio 1.84 (17-19).
Mercruiser No. 43-75325A3

546,37 EUR / Set
incl. 19% VAT
Lieferung Thu 20. Aug - Mon 24. Aug 2026 **
24 months statutory warranty
Original spare part
Gear set Ratio 1.98 for Mercruiser Alpha, 55778A3
Mercury-Mercruiser-Quicksilver
Gear set Ratio 1.98 for Mercruiser Alpha, 55778A3
article nr.03869

Upper gear set Ratio 1.98 (20-24).
Mercruiser No. 43-55778A3

506,20 EUR / Set
incl. 19% VAT
Lieferung Thu 20. Aug - Mon 24. Aug 2026 **
24 months statutory warranty
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  • Fast delivery for maintenance, servicing and repairs
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Function & significance of the Alpha One Gen2 Drive

The drive unit in the Mercruiser Alpha One Gen2 combines engine power with the propeller drive. It ensures

  • Efficient power transmission from the engine to the drive

  • Precise shifting and driving reactions

  • Reliable forward, neutral and reverse gears

  • Stable and resilient system operation

A functioning drive is essential for performance, handling and safety on the water.


Structure & technical features

The drive unit consists of several assemblies:

  • Gearbox housing with integrated carrier and sealing surfaces

  • Gears & toothing for the transmission of the motor speed

  • Bearings & bushings for axial and radial guidance

  • Seals & shaft seals for sealing against water and oil

  • Shifting and power transmission elements

  • Fastening parts, screws & spacer sleeves

Together, these assemblies ensure stable power transmission and minimal friction losses.


Typical spare parts & service components

Key drive spare parts for the Alpha One Gen2 include:

  • Gear sets & geared components

  • Bearings & bearing bushes

  • Shaft seals & housing seals

  • Spacer and fitting sleeves

  • Shift and clutch parts

  • Fastening screws & service kits

Precisely fitting components minimize play, reduce mechanical wear and ensure smooth operation.


Selection criteria: Model, OEM reference & fit

The right choice of spare parts is crucial:

  • Mercruiser Alpha One Gen2 Drive model & engine combination

  • OEM reference number or original part number

  • Year of manufacture & series configuration

  • Dimensions, gear and flange dimensions

  • Application profile (load, sailing area)

Structured matching reduces incorrect orders and ensures perfect fit and function.


Installation & service instructions

The following applies when installing and servicing drive components:

  • Remove old seals completely

  • Clean and check contact and sealing surfaces

  • Align new seals/shaft seals correctly

  • Press in or align bearings without play

  • Position gears and splines precisely

  • Observe OEM torque specifications for screws

  • Perform a functional test under load after assembly

Correct assembly extends service life and reduces the risk of failure.


Maintenance, testing & typical error patterns

Regular maintenance and inspection measures include

  • Visual inspection for leaks or oil film

  • Check bearing condition for play or noise

  • Checking the toothing surfaces for wear

  • Function test under load and different driving conditions

Typical error patterns are

  • Irregular shifting reactions

  • Play in the drive system

  • Toothing or bearing noises

  • Leakage at sealing surfaces

Early diagnosis prevents consequential damage and expensive repairs.


Quality & safety aspects

Mercruiser Alpha One Gen2 Drive spare parts are characterized by:

  • OEM-compliant fit & technical specification

  • Corrosion and pressure-resistant alloys

  • High-quality gearing and bearing technology

  • Service components for inspection and maintenance

This increases efficiency, reduces maintenance costs and ensures robust running and driving performance.