Alpha 1 and Generation 2 Outdrive Parts Drawings

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Mercruiser Alpha One parts drawing *Upper gearcase

GLM Marine aftermarket upper gearcase stern drive parts
Comprehensive exploded view outdrive tech drawing

  • All GLM products are completely compatible and interchangeable with OEM parts. GLM has committed to producing high quality and cost effective aftermarket parts for the past two decades
  • If help is required, contact our service tech for advice troubleshooting your sterndrive unit at (416) 751-7326
  • Mercruiser Alpha one and 2 repair tools
  • Bell housing drawing

Mercruiser Alpha One upper gearcase

Mercruiser Alpha One upper gearcase

 

Click on video for upper gearcase repair help
87500 Seal kit parts
87500 Seal kit parts
A
P/N 87500 GLM Marine aftermarket seal kit for upper gear-case $25.00

39622
39622
B
P/N 39622 OEM 27-94996Q2 $9.15 (This gasket is required to install the outdrive back onto the bell housing)

19000
19000
1A
P/N 19000 Empty drive shaft housing / 1547-9412A18 $589.29

assembly 20 22
assembly 20 22
1C
P/N 19100 Complete upper housings (all ratios available) (new) 1547-9412A20 $1195.09

28400 cover bearing assembly
28400 cover assembly
P/N 28400 Cover assembly with parts
94998A4 Top comes with P/N 21511,
shim P/N 23261 and 4 bolts $83.89

21510
21510
5A
P/N 21510
upper cover tapered assembly O.D. 1-15/16" OEM 31-61100A1 $28.29

21511 bearing cover 1 25-32
21511 cover 1 25-32
5B
P/N 21511
Roller bearing for upper cover assembly O.D. 1-25/32"
31-32575A1 $17.09

11130 drive shaft
11130 drive shaft
6
P/N 11130 Upper drive shaft / 45-55796 $75.09

80420 o ring
80420 o ring

11210  gear set V8 22-20 gear ratio
11210 gear set V8 22-20 gear ratio
8A
P/N 11210
V8 heavy duty 20/22 Gears for Alpha 1 and generation 2 with HD P/N 21560 included / 43-18411A2
$349.00 ratio 1.50-1.47 / 20/22 gears

11220  24-24 1970-1997
11220 24-24 1970-1997
8B
P/N 11220
6 Cylinder inline gear set (1.65 or 1.62 Ratio) 24-24 years 1970 to 1997 / 43-45814A5 $299.00

11230  ratio 17-19 V 6 470-485
11230 ratio 17-19 V 6 470-485
8C
P/N 11230
V6 and 470/485 model gear set ratio. 1.81-1.84 / 17/19 gears / 43-75325A3 $259.00

11240  20-24 ratio 1.98 4 cylinder
11240 20-24 ratio 1.98 4 cylinder
8D
P/N 11240
4 Cylinder inline 20/24 gear set (1.98 or 1.94 Ratio) 43-55778A3 $259.00

21560  1.50
21560 1.50
9A
P/N 21560 bearing tapered roller (1.50 ratio) 31-32573A1 $31.89

21540  1.65 1.84 1.98
21540 1.65 1.84 1.98
9B
P/N 21540 roller type (1.65, 1.84, 1.98 Ratio) 31-35990A1 $34.09

 
9C
P/N 21550
Roller bearing for Mercruiser Alpha 17/19 gear set (1.32 Ratio) 31-66818A1 $66.89

23270 driven gear bearing shim
23270 driven gear shim
10
P/S 23270
Shims / 15-36178A1 $5.89

 
11
P/N 85020
Oil seal $11.89

 
12
P/N 85060
Oil seal $9.89

 
14
P/N 28050
U joint assembly / 814819A2 $405.89

28315  drive shaft yoke
28315 drive shaft yoke
28030  U-joint
28030 U-joint
16A
P/N 28030
Heavy duty Rockwell u joints / 75832T-1 $45.89

28100  socket
28100 socket
17
P/N 28100 Socket for yoke $42.09

28310
28310
18
P/N 28310 Yoke / 46020-1 $58.89

28350 retainer nut
28350 retainer nut
19
P/N 28350
Retainer nut / 816811-1 $18.89

28390  ring
28390 ring
20
P/N 28390 Upper gear-case ring $8.89

 
21
P/N 82380
O ring

28370 bearing carrier assembly

28370 carrier assembly

22
P/N 28370 Carrier assembly / 66081A2 $37.89

 
23
P/N 85030
Oil seal - for yoke $15.89

21520  bearing set
21520 set
24A
P/N 21520
Roller bearing (All Ratio except 1.32) 31-35988A2 $107.89

23280  shim kit
23280 shim kit
25
P/N 23280
Double bearing shims (6 units) 15-35980A1 $7.89

 
26
P/N 28380 Spacer / 15-71013 Two units $5.89

28330 tension washer
28330 tension washer
27
P/N 28330 Tension washer / 12-45810 $4.89

28360  nut
28360 nut
28
P/N 28360 Lock nut / 11-22339 $4.89

 
29
P/N 21731
Magnetic drain screw $5.89

 
30
P/N 31170
Washer

28300 screw
28300 screw
31
P/N 28300 Cover screw / 10-98794 $4.89

21890  plug
21890 plug
32
P/N 21890 Plug / 19-47579 $4.89

21170  lock nuts
21170 lock nuts
33
P/N 21170
Lock nuts (5) 11-13439-1 $9.89

 
34
P/N 31150
gasket (5 units) for water cover pocket (Included in seal kit) $9.89

22440 screw
22440 screw
35
P/N 22440
water pocket screw / 10-28668 $4.89

 
36
Water pump passage kit with copper tube
 
37
P/N 21423 Bushing / 23-32632 $14.89

 
38
Grommet

 
39
Copper tube
22031  welch plug 1.250 inch
22031 welch plug 1.250 inch
40
P/N 22031
welch plug (1-1/4"O.D.) 19-42682 $4.89

 
41
P/N 22032 Pipe plug OEM 22-42861-1 plug $4.89