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OMC Parts Drawing *Cobra *Mercruiser *Alpha SEI Outdrives

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  • Mercruiser upper gearcase parts 26 to 48

Stern drive and Alpha One upper gear housing components # 26 - 48 with break down drawing

Updated April 19th

  • Exploded view drawing for easy upper gear case component identification with photos
  • Compatible with Mercruiser and Alpha One units up to 1990
  • Shift shafts, seals and kits
  • GLM Aftermarket and OEM Mercury numbers

Mercruiser Alpha One 26 to 48

Mercruiser Alpha One Parts Drawing, Mercruiser Alpha One Parts Drawing

Mercruiser Alpha exploded view parts 26-48

Photo

Description / OEM #

Price
(USD)

Price (Canadian)

12110 water pump

12110 Water pump

Item A
P/N 12110 Water pump impeller kit with housing ( 1970 – 1983, MC-1 and R models, serial numbers 2763442 – 6854392 ). Click on picture for newer 1984 – 1990 Alpha One and 1991 and up Gen 2 models.

$39.95

$ 66.89

Mercruiser Alpha One 26 to 48

58231

Item B
P/N 58231

Complete GM 305/350 V8 conversion kit from older log style to newer center rise.

Click on photo for all other engine / models.

$598.95

$ 1,438.89

28380 Spacer.

28380 Spacer

Item 26
P/N 28380
 
 
15 – 71013

$7.95

$ 10.89

Mercruiser Alpha One 26 to 48

28330 Tension washer

Item 27
P/N 28330
 

12 – 45810

$4.95

$4.89

28360 Lock nut

28360 Nut

Item 28
P/N 28360
 
 

11 – 22339

$4.95

$5.89

22420 Alpha 1 Gen-2 Screw kit

22420

Item 29
P/N 22420
 
 

10 – 79953Q2

$4.95

$4.89

31170 Washer

31170

Item 30
P/N 31170
 
 

12 – 19183-2

$4.00

$4.89

28300 Screw

28300 Screw

Item 31
P/N 28300
 
 

10 – 98794

$3.95

$4.89

21890 Plug

Item 32
P/N 21890 
 
 

19 – 47579

$4.95

$4.89

21170 Lock nut

21170

Item 33
P/N 21170
 
 

11 – 13439 – 1

$4.95

$4.89

31150 Gasket

Item 34
P/N 31150
 
 

27 – 55810 – 1

$4.95

$4.89

22440 Screw.

22440

Item 35
P/N 22440

Screw
 

10 – 28668

$4.95

$4.89

12200 Water pocket cover kit

12200 Pocket cover kit

Item 36
P/N 12200
 
 
(includes plastic housing, copper tube, 4 screws, base gasket and grommet)
 

42724 A3

$28.95

$ 45.89

21423 Bushing for intermediate shift shaft 23-32632

21423 Bushing

Item 37
P/N 21423
 
 
(metal, for shift shaft)
 

23 – 32632

$20.95

$ 28.89

85150 Grommet for water tube

85150 Seal

Item 38
P/N 85150
Grommet

26 – 36557

$4.95

$4.89

12202 Water tube 32-54236

12202 Mercruiser water tube

Item 39
P/N 12202 
 
 

32 – 54236

$8.95

$ 12.89

22031 Welch plug 19-42682.

22031 Welch plug

Item 40
P/N 22031
 
 
( 1-1/4 O.D. )
 

19 – 42682

$4.00

$4.89

22032 Pipe plug 22-428611.

22032

Item 41
P/N 22032 
 
 

22 – 42861 – 1

$4.00

$4.89

21421 INTERMEDIATE SHIFT SHAFT

21421

Item 43
P/N 21421
 
 

62104 – 1

$43.95

$ 77.89

21422 washer

21422

Item 44
P/N 21422 
 
 

12 – 32666

$3.95

$4.89

cotter pin

22100 Cotter pin

Item 45
P/N 22100
 

18 – 32665

$4.95

$4.89

87500 Mercruiser seal kit

87500

Item 46
P/N 87500
 
 
26 – 32511A1

$24.95

$ 30.89

39622 Bell housing gasket kit

39622 Bell housing gasket

Item 47
P/N 39622 Bell housing gasket kit ( 1983 to present, serial numbers 6225577 and up )

27 – 94996 T2

$9.95

$ 9.89

39590 Mercruiser bell housing gasket (MC-1)

39590

Item 48
P/N 39590
 

Years 1967 to 1982

Serial numbers 2062141 –  6225576 )

27 – 64818T4

$9.95

$ 7.89