OMC Parts Drawing *Cobra *Mercruiser *Alpha SEI Outdrives

Alpha One and Mercruiser outdrive components #26-50 with exploded view drawing

Last updated on 11/11/2023

  • Alpha One (up to 1990) and Mercruiser lower unit GLM aftermarket parts
  • Gears, gear sets, shifting components
  • Roller and tapered bearings
  • OEM Mercury cross reference numbers
Mercruiser outdrive parts drawing 51-77, Mercruiser Alpha One lower unit parts, Mercruiser outdrive components #26-50

Mercruiser outdrive components #26-50

Photo

Description / OEM #

Price
(USD)

Price (Canadian)

87510 seal kit

Item A
P/N 87510 Seal kit

26-33144A2

$38.95

$ 66.89

Mercruiser outdrive components for years 1984 to 1990

12120

Item B
P/N 12120
 Water pump impeller kit with housing (1984 – 1990, MR and Alpha One, serial numbers 6854393-OD469858). Click on picture for older MC-1, R and 1991 and up Gen 2 kits.

$35.95

$ 63.89

Mercruiser Alpha One lower unit parts

Lower Unit 1623-8951A43

SE106 SEI Mercruiser sterndrive

Item C
SEI SE106
 Aftermarket outdrive Mercruiser,
MR / Alpha One Gen 1 complete lower unit. For 1970 to 1990 models, serial numbers 2791957-OD469858, 4 cylinder, V6 and V8 models for up to 300 horsepower.

OEM 1623-8951A43

$1125.96

$1499.89

51230 GM exhaust V8-260 manifold

51230

Item D
P/N 51230
 GM 5.0L, 5.7L 305 – 350 V8 exhaust manifold, center rise for 1983 – 2001 models. Click on photo for all other engine / model manifolds.

860246Q11

$190.95

$ 363.89

Mercruiser outdrive components #26-50

81180

Item 27
P/N 81180
 O-rings (5)

25-25439

$4.95

$4.89

32790

Item 28
P/N 32790
 Washer

12-27880

$4.00

$4.89

21132 Clip

Item 29
P/N 21132
 Clip

18-20233

$4.00

$4.89

Mercruiser outdrive components #26-50

21030 lower shift shaft

Item 30
P/N 21030
 Shift shaft

77481-1

$37.95

$ 62.89

Mercruiser outdrive components #26-50

85140 Oil passage seal

Item 31
P/N 85140
 Oil passage seal (5 units)

26-45577-1

$8.95

$ 4.89

Mercruiser outdrive components #26-50

21731 Drain plug

Item 32
P/N 21731
 Drain screw (includes gasket)

22-8M0058389

$6.95

$7.89

31170 Washer

31170

Item 33
P/N 31170
 Gaskets for drain plugs (5)

12-19183-2

$10.95

$4.89

21870 Insert

Item 34
P/N 21870
 Insert screen (starboard)

93423-1

$5.95

$ 6.89

Mercruiser outdrive components #26-50

21880

Item 35
P/N 21880
 Insert screen (port)

93424-1

$5.95

$ 6.89

Item 36
P/N 12822
 Screw

10-76156

$7.95

$9.89

21161

Item 37
P/N 21161
 Nut

11-45812

$4.00

$ 18.89

21170

21170

Item 38
P/N 21170
 Lock nuts (5)

11-859116

$9.95

$11.89

21740

Item 39
P/N 21740
 Screw

10-32470

$5.95

$ 12.89

22430

Item 40
P/N 22430
 Screw

10-30206

$4.00

$4.89