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.

Original spare part
Sealing ring oil cap for Mercruiser / Mercury / OMC, 191833
Mercury-Mercruiser-Quicksilver
Sealing ring oil cap for Mercruiser / Mercury / OMC, 191833
article nr.03887

Sealing ring (oil screw) for Alpha Z-drives and outboards
Mercruiser No. 12-191833

1,22 EUR / Piece
(2)
incl. 19% VAT
Lieferung Thu 20. Aug - Mon 24. Aug 2026 **
24 months statutory warranty
Original spare part
Nut 7/16" self-locking for Mercruiser Alpha/Bravo 8M0204653
Mercury-Mercruiser-Quicksilver
Nut 7/16" self-locking for Mercruiser Alpha/Bravo 8M0204653
article nr.03891

Self-locking nut for the Alpha/Bravo screw connection on the bell housing.
Mercruiser ref. no. 11-134391, 11-8267119, 11-859116, 13436, 13438, 134391, 859116

5,11 EUR / Piece
incl. 19% VAT
Lieferung Thu 20. Aug - Mon 24. Aug 2026 **
24 months statutory warranty
Magnesium Incl. mounting material
Magnesium anode set for Mercruiser Alpha One Gen.2 from 1991
Magnesium anode set for Mercruiser Alpha One Gen.2 from 1991
article nr.03152

Magnesium anode set (fresh water) for Z-drive Alpha One. Gen.2.
Mercruiser ref. no. 888755Q03

54,96 EUR / Set
incl. 19% VAT
Lieferung Thu 20. Aug - Mon 24. Aug 2026 **
24 months statutory warranty
Aluminum Incl. mounting material
Anode set aluminum for Mercruiser Alpha One Gen.2 from 1991
Anode set aluminum for Mercruiser Alpha One Gen.2 from 1991
article nr.02687

Aluminum anode set (all water types) for Z-drive Alpha One. Gen.2.
Mercruiser ref. no. 888756Q03

31,64 EUR / Set
incl. 19% VAT
Lieferung Thu 20. Aug - Mon 24. Aug 2026 **
24 months statutory warranty
Original spare part
Lock nut for Mercruiser / OMC / Volvo Penta, MD859135
Mercury-Mercruiser-Quicksilver
Lock nut for Mercruiser / OMC / Volvo Penta, MD859135
article nr.05239
5,66 EUR
incl. 19% VAT
Lieferung Thu 20. Aug - Mon 24. Aug 2026 **
24 months statutory warranty
Original spare part
Oil screw without magnet for Mercruiser Alpha 79953Q04
Mercury-Mercruiser-Quicksilver
Oil screw without magnet for Mercruiser Alpha 79953Q04
article nr.02322

Without magnet
Mercruiser ref. no. 10-79953Q04

6,35 EUR
(1)
incl. 19% VAT
Lieferung Thu 20. Aug - Mon 24. Aug 2026 **
24 months statutory warranty
Original spare part
Ground strap set for Mercruiser Z-drives 99940A2
Mercury-Mercruiser-Quicksilver
Ground strap set for Mercruiser Z-drives 99940A2
article nr.04922

for all common Mercruiser Z-drives (see details)

48,89 EUR / Set
incl. 19% VAT
Lieferung Thu 20. Aug - Mon 24. Aug 2026 **
24 months statutory warranty
Zinc Incl. mounting material
Anode set zinc for Mercruiser Alpha One Gen.2 from 1991
Anode set zinc for Mercruiser Alpha One Gen.2 from 1991
article nr.03729

Zinc anode set (salt water) for Z-drive Alpha One. Gen.2.

43,87 EUR / Set
(1)
incl. 19% VAT
Lieferung Thu 20. Aug - Mon 24. Aug 2026 **
24 months statutory warranty
Oil seal for Mercruiser Alpha, MD823894
Oil seal for Mercruiser Alpha, MD823894
article nr.03883

Mercruiser ref. no. 26-823894

19,79 EUR
incl. 19% VAT
Lieferung Thu 20. Aug - Mon 24. Aug 2026 **
24 months statutory warranty
O-ring for Mercruiser / OMC, MD25-32546
O-ring for Mercruiser / OMC, MD25-32546
article nr.03858

Mercruiser ref. no. 25-32546, OMC ref. no. 508674,

6,70 EUR / Piece
incl. 19% VAT
Lieferung Thu 20. Aug - Mon 24. Aug 2026 **
24 months statutory warranty
Universal joint for Mercruiser / OMC / Volvo Penta, MD3850812
Universal joint for Mercruiser / OMC / Volvo Penta, MD3850812
article nr.03848

Universal joint for Mercruiser Alpha One (also Gen.2) 1986-1993, Bravo, OMC Cobra / King Cobra from 1990 and Volvo Penta DP-S, DPS-A, SX, XPD

63,95 EUR
incl. 19% VAT
Derzeit nicht verfügbar **
24 months statutory warranty
Lock nut for MerCruiser / OMC, MD11-22339
Lock nut for MerCruiser / OMC, MD11-22339
article nr.02323

Mercruiser ref. no. 11-22339

7,34 EUR
incl. 19% VAT
Lieferung Thu 20. Aug - Mon 24. Aug 2026 **
24 months statutory warranty
Stud bolt bell for Mercruiser Alpha and Bravo, MD59579
Stud bolt bell for Mercruiser Alpha and Bravo, MD59579
article nr.09478

Stud bolt is for the Alpha / Bravo screw connection on the bell housing.
Mercruiser ref. no. 16-59579, 35937, 56-90415A24, 59579

9,20 EUR
incl. 19% VAT
Lieferung Thu 20. Aug - Mon 24. Aug 2026 **
24 months statutory warranty
Washer for Mercruiser, MD35935
Washer for Mercruiser, MD35935
article nr.05240
7,12 EUR / Piece
incl. 19% VAT
Lieferung Thu 20. Aug - Mon 24. Aug 2026 **
24 months statutory warranty
Hexagon head screw for Mercruiser, MD816601
Hexagon head screw for Mercruiser, MD816601
article nr.05241
7,91 EUR
incl. 19% VAT
Lieferung Thu 20. Aug - Mon 24. Aug 2026 **
24 months statutory warranty
Top gasket set for Mercruiser Alpha One Gen.2 from 1991, MD88397A1
Top gasket set for Mercruiser Alpha One Gen.2 from 1991, MD88397A1
article nr.02906

For Z-drive above-water part (drive).
Mercruiser Ref. no. 26-88397A1

32,57 EUR / Set
incl. 19% VAT
Lieferung Thu 20. Aug - Mon 24. Aug 2026 **
24 months statutory warranty
Mercruiser Alpha One Gen 2 Wear Pad Kit 8M2015937, 8M2015938
Mercruiser Alpha One Gen 2 Wear Pad Kit 8M2015937, 8M2015938
article nr.05028

The set includes the side plastic snap-in cover caps 8M2015938 and 8M2015937 on the upper Alpha actuator

23,04 EUR / Set
incl. 19% VAT
Lieferung Thu 20. Aug - Mon 24. Aug 2026 **
24 months statutory warranty
Castle nut (drive shaft) for Mercruiser R/MR/Alpha, MD8168112
Castle nut (drive shaft) for Mercruiser R/MR/Alpha, MD8168112
article nr.03880

Mercruiser ref. no. 8168112

33,72 EUR
incl. 19% VAT
Lieferung Thu 20. Aug - Mon 24. Aug 2026 **
24 months statutory warranty
O-ring 25-25439
Recmar
O-ring 25-25439
article nr.REC25-25439

O-RING

7,59 EUR / Piece
incl. 19% VAT
Lieferung Thu 20. Aug - Mon 24. Aug 2026 **
24 months statutory warranty
Washer for Mercruiser Alpha gear wheel nut, MD45810
Washer for Mercruiser Alpha gear wheel nut, MD45810
article nr.03888

Mercruiser ref. no. 12-45810

11,49 EUR / Piece
incl. 19% VAT
Lieferung Thu 20. Aug - Mon 24. Aug 2026 **
24 months statutory warranty
Displaying 1 to 20 (of 62 products)
  • Over 15 years’ experience in the marine spare parts trade
    Over 15 years’ experience in the marine spare parts trade
  • Official Mercury & MerCruiser dealer
    Official Mercury & MerCruiser dealer
  • A wide range of boat engine spare parts from A to Z
    A wide range of boat engine spare parts from A to Z
  • Spare parts for Volvo Penta, MerCruiser, Yamaha, Honda, Suzuki and more
    Spare parts for Volvo Penta, MerCruiser, Yamaha, Honda, Suzuki and more
  • Fast delivery for maintenance, servicing and repairs
    Fast delivery for maintenance, servicing and repairs
  • Order boat spare parts conveniently online 24/7
    Order boat spare parts conveniently online 24/7

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.