OMC Parts Drawing *Cobra *Mercruiser *Alpha SEI Outdrives
- Mercruiser upper gearcase parts 26 to 48
Stern drive and Alpha One upper gear housing components #26-48 with breakdown drawing
Last updated on 9/26/2023
- Exploded view drawing for easy upper gearcase component identification with photos
- Compatible with Mercruiser and Alpha One outdrives up to 1990
- Shift shafts, seals and kits
- GLM Aftermarket and OEM Mercury numbers for easy cross referencing
Mercruiser Alpha One 26 to 48
Mercruiser Alpha exploded view parts 26-48
Photo
Description / OEM #
Price
(USD)
Price (Canadian)
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
$52.95
58231
Item B
P/N 58231 Complete GM 305/350 V8 manifold conversion kit, from older log style to newer center rise. Click on photo for all other engine / model manifolds.
$598.95
$790.95
28380 Shims
Item 26
P/N 28380 Shim
15-71013
$7.95
$8.95
28330 Tension washer
Item 27
P/N 28330 Washer
12-45810
$4.95
$5.95
28360 Nut
Item 28
P/N 28360 Nut
11-22339
$4.95
$5.95
22420
Item 29
P/N 22420 Screw
10-79953Q2
$4.95
$5.95
31170
Item 30
P/N 31170 Washers (5)
12-19183-2
$4.00
$4.00
28300 Screw
Item 31
P/N 28300 Screw
10-98794
$3.95
$4.95
21890 Plug
Item 32
P/N 21890 Plug
19-47579
$4.95
$5.95
21170
Item 33
P/N 21170 Lock nuts (5)
11-13439-1
$4.95
$5.95
31150 Gasket
Item 34
P/N 31150 Gasket
27-55810-1
$4.95
$5.95
22440
Item 35
P/N 22440 Screw
10-28668
$4.95
$5.95
12200 Pocket cover kit
Item 36
P/N 12200 Water pocket cover kit (includes plastic housing, copper tube, 4 screws, base gasket and grommet)
42724A3
$28.95
$36.95
21423 Bushing
Item 37
P/N 21423 Bushing (metal, for shift shaft)
23-32632
$20.95
$27.95
85150 Seal
Item 38
P/N 85150 Grommet
26-36557
$4.95
$5.95
12202 Mercruiser water tube
Item 39
P/N 12202 Water Tube
32-54236
$8.95
$10.95
22031 Welch plug
Item 40
P/N 22031 Welch Plug (1-1/4 O.D.)
19-42682
$4.00
$4.00
22032
Item 41
P/N 22032 Pipe plug
22-42861-1
$4.00
$4.00
21421
Item 43
P/N 21421 Intermediate Shift Shaft
62104-1
$43.95
$57.95
21422
Item 44
P/N 21422 Washer
12-32666
$3.95
$4.95
22100 Cotter pin
Item 45
P/N 22100 Cotter pins (10)
18-32665
$4.95
$5.95
87500
Item 46
P/N 87500 Seal kit
26-32511A1
$24.95
$31.95
39622 Bell housing gasket
Item 47
P/N 39622 Bell housing gasket kit (1983 – present, serial numbers 6225577 and up)
27-94996T2
$9.95
$12.95
39590
Item 48
P/N 39590 Outdrive installation gasket kit (1967 – 1982, serial numbers 2062141 – 6225576)
27-64818T4
$9.95
$12.95