Alpha 1 and Generation 2 Outdrive Parts Drawings

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Alpha 1 lower unit parts drawing items 1 to 34

GLM Marine aftermarket lower gearcase stern drive parts. Printer friendly comprehensive exploded outdrive tech drawings.

  • All GLM products are brand new completely compatible and interchangeable with Mercruiser Alpha One parts. GLM has committed to producing high quality and cost effective aftermarket parts for the past two decades
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Alpha one lower gear case layout drawing
Alpha one lower gear case layout drawing

Picture
Description
87510 seal kit

87510 seal kit

A
P/N 87510
Alpha one seal kit lower gear-case OEM 26-33144A2 $43.00

25125 seals gears bearings shims 13-21

25125 seals gears bearings shims 13-21

B
P/N 25125
Alpha One seal, bearing and gear kit OEM 43-803091T1 $661.89

25120

25120

C
P/N 25120
Seal bearing kit with P/N 21570 upper bearing $224.89

12120 water pump

12120 water pump

D
P/N 12120
Alpha One water pump kit $37.29

18000

18000

1
P/N 18000
Lower gear housing for the Alpha 1 stern-drive (Case only) $736.89

18100 complete

18100 complete

P/N 18100 GLM Marine aftermarket Mercruiser Alpha One lower unit replacement outdrive complete assembly years 1972 to 1990 $1149.89

12410 housing

12410 housing

2
P/N 12410 Water pump housing (Included in water pump kit) $30.89

12810 cup

12810 cup

3
P/N 12810
Cup (*NOT included in water pump kit) $5.09

89840 impeller

89840 impeller

4
P/N 89840
Water pump impeller(Included in water pump kit) $18.89

23200 retainer

23200 retainer

5
P/N
Retainer for drive shaft bearing OEM 824519-1 $4.89

12833 screw

12833 screw

6
P/N 12833
Screw for wear plate cover OEM 10-96411 $4.89

21180 lock nuts

21180 lock nuts

7
P/N 21180
Lock nuts (5 units) OEM 11-13438 $6.09

12830 seal

12830 seal

8
P/N 12830 Seal (Included in water pump kit)

12820 guide tube

12820 guide tube

9
P/N 12820
Tube guide (Included in water pump kit)
81160 o ring for drive shaft

81160 o ring for drive shaft

10
P/N 81160 o ring (5 units)(Included in water pump kit)
21190 lock nuts

21190 lock nuts

11
P/N 21190
Lock nuts (5 units) OEM 11-13436 $8.09

21720 washers

21720 washers

12
P/N 21720 Washer set (3 units) OEM 12-36001 $4.89

11070 Impeller key

11070 Impeller key

13
P/N 11070
Impeller keys (1unit) OEM 28-56654 $4.89
31020

31020

14
P/N 31020
Gasket (Included in water pump kit)
12510 impeller wear plate
15
P/N 12510 Wear plate (Included in water pump kit)
 
16
P/N 31010 Gasket for wear plate (Included in water pump kit)
12320 base
12320 base
17
P/N 12320
Water pump base (Included in water pump kit)
85040 oil seal
85040 oil seal
18
P/N 85040
Oil seal(Included in water pump kit)
85070
85070
19
P/N 85070
Oil seal $9.89

 
20
P/N 81390 o ring (Included in water pump kit)
82270 o ring
82270 o ring
20B
P/N 82270
Water pump o ring (Included in water pump kit)
21580 bearing
21580 bearing
22
P/N 21580
Tapered roller bearing for drive shaft MR/Alpha One/Gen 2 OEM 31-36387A1 $35.89

23210 drive shaft bearing shim kit
23210 drive shaft bearing shim kit
23
P/N 23210
Shims OEM 15-42637A1 $5.89

21800 washers
21800 washers
24
P/N 21800
Washer set (5 units) OEM 12-29395 $4.89

30010 outdrive gasket
30010 outdrive gasket
25
30010
Washer gaskets OEM# 12-31266 $4.89

85581 oil seal
85581 oil seal
26
P/N 85581
Oil Seal (Included in seal kit)
21010 bushing assembly
21010 bushing assembly
27
P/N 21010
Shift bushing assembly (Included in seal kit)
81180 o ring
81180 o ring
28
P/N 81180
O-Ring (Included in seal kit)
32790 washers
32790 washers
29
P/N 32790
Washer set (10 units) OEM 12-27880 $4.89

21132 outdrive clip
21132 outdrive clip
30
P/N 21132
Clip OEM 18-20233

21030 lower shift shaft
21030 lower shift shaft
31
P/N 21030
Shift shaft OEM 77481-1 $25.89

17
85140 oil passage seal
85140 oil passage seal
32
P/N 85140
Oil passage seal (5 units) OEM 26-45577-1(Included in seal kit) $9.89

21731 draining screw set
21731 draining screw set
33
P/N 21731
Oil plug drain screw magnetic OEM 22-67892A1 $5.89

31170
31170
34 # 31170 Washer (Included in seal kit)

Alpha 1 lower gear-case exploded view parts drawing
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