Mercruiser Alpha 1 Gen 2 outdrive parts *Upper Lower gearcase

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Mercruiser Alpha One Gen 2 top cover assembly

Upper gearcase top cover assembly

  • Top cover assembly comes with bearings, shims, screws and o-ring
  • See table below for repair and service parts
  • 21511 Bearing is not interchangeable with other size bearings

Photo

Description / OEM #

Price
(USD)

Price
(Canadian)

28402 Cover assembly

28402 Upper unit top cover assembly

P/N 28402 Upper unit top cover assembly.

Includes parts:
21511 Bearing
23261 Shim
28300 Screws (4)
80420 O-ring
OEM:828692A1

$190.95

$251.95

28402 Cover assembly front

28402 Upper unit top cover assembly

This photo displays the outside/front of the cover assembly unit

   
21511 Tapered roller bearing assembly

21511 Tapered roller bearing

P/N 21511 Tapered roller bearing (1-25/32 O.D.)
OEM: 31-32575T1
Only this bearing will fit this cover assembly.

CAN NOT USE ANY OTHER BEARING.

$8.95

$11.95

23261 Shim
23261 Shim

P/N 23261 Shim
For bearing 21511
(for bore size 1.7813)
OEM: 15-32563A1

$5.95

$7.95

28300 Screw
28300 Screw

P/N 28300 Screw

OEM: 10-98794
Price is per screw
Cover requires 4 screws

$4.95

$6.95

80420 O-ring

80420 O-ring

P/N 80420 O-ring

OEM: 25-32546

$4.95

$6.95