Alpha 1 stern drive parts / Outdrive drawings

Mercruiser Alpha 1 parts with lower gearcase drawing

T.C.Electronics / Marine home page
Aluminum propellers
Alpha 1 parts exploded upper gearcase drawing
Upper gearcase faster loading tech drawing
Alpha 1 parts exploded lower gearcase drawing
Lower unit gearcase complete
1984 thru 1990 replacement lower unit gearcase
1984 thru 1990 replacement upper unit gearcase assembly
Outdrive repair cost
Alpha bell housing parts & drawing
Alpha shift cable and transom parts
Alpha 1 Gimbal housing drawing
Alpha One used parts
Anode
Bearings (upper gearcase)
Bearing retainer nut
Bearing retainer tool
Ball bearing used in lower gearcase
Bearing seals gears lower gearcase
Bearings seals & shims for lower gearcase
Bearing carrier seal upper gearcase
Bearing carrier lower gearcase
Bushing
Carrier assembly
Cover nut
Clip
Clutch dog
Cluch dog spring
Cover assembly
Cross Pin
Drain screw
Drive shaft (upper gearcase)
Drive shaft pinion bearing
Drive shafts
Exhaust bellow
Forward & pinion gears
Forward gear shims
Gasket for wear plate
Gasket for water pocket
Gasket (lower)
Gears bearings shims seals upper gearcase
Gimbal bearing
Impeller
Keys
Insert (port)
Insert (starboard)
Lock nut
Lockwasher
Lock nut (upper)
Lower gear housing (empty)
Magnesium anodess
Nut assembly
Oil pump for lower unit
Oil seal (lower)
Oil seal water pump
Oil seal for yoke
O-ring (lower)
O-ring (lower)
Outdrive gasket kit
Pinion nut
Plug
Pipe plug
Propeller Hardware
Propeller or prop shaft
Prop Nut
Retainer nut
Retainer (lower)
Ring (upper)
Roller bearing from lower gearcase
Reverse gear
Screw wear plate cover
Screw for top cover
Seal kit upper gearcase
Seal kit lower gearcase
Seal (lower)
Shims (upper)
Shift cable assemblies
Shift shaft
Shift Spool
Shims lower gearcase
Shims (forward gear)
Shims upper gearcase
Shift crank
Screw water pocket
Socket
Spacer for bearing
Tools
Trim cylinders with parts layout
Trim cylinder hoses & drawing
Transom service kit
Tapered bearings for lower gearcase
Trim Cylinder hose drawing
Trim cylinder parts hoses drawing
Tab washer
Tab Washer
Thrust Hub
Thrust Ring
Trim cylinder application chart
Trim cylinder components
Tube guide
Used Alpha One upper units
Upper gearcase housing (empty)
U-joint
U-joint bellow
Washer (lower)
Water pocket cover kit
Water pump
Water pump housing
Water pump base
Water pump tube
Washer tension for drive gear
Washer set
Washer gaskets
Wear plate (lower)
Welch plug
Yoke (drive shaft)
Yoke (short shaft)
Alpha 1 shift cable assembly
Drive shaft adaptor
Drive gear shimming tool
Shift bushing
Washer set (lower)
Washer clip (lower)
Seal for oil passage
GLM Marine aftermarket Mercruiser Alpha 1 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
  • Alpha One stern drive troubleshooting help if required by contacting our service technition for advice troubleshooting your Alpha One stern drive unit at (416) 751-7326
Lower gearcase Mercruiser Alpha 1 parts
Alpha one lower gear case layout drawing.jpg
Mercruiser Alpha one lower gear case layout drawing

Picture
Item
Description
Cart
TM 87510 Alpha 1 seal kit lower gearcase
87510 seal kit lower unit gearcase
A
 # 87510 Alpha one seal kit  lower gearcase
OEM # 26-33144A2

  $45.79

TM 25125 Alpha seals gears bearings shims 13-21
25125 Alpha lower unit seals gears bearings shims 13-21 gear ratio
B
# 25125 Alpha One seal, beaing and gear kit
OEM # 43-803091T1

  $641.79

TM 25120 Alpha seal kit shims bearings
25120 lower unit seal kit shims and bearings
C
# 25120 Seal bearing kit  with #21570 upper bearing

  $218.79

TM 12120 Alpha 1 water pump
12120 Water pump lower gearcase
D
# 12120 Alpha One water pump kit
OEM # N/A

  $53.79

TM 18000 Alpha 1 lower case only
18000 (lower) case only)
1
# 18000 Lower gear housing for the Alpha 1 sterndrive

  $797.79

TM 18100 Alpha 1 lower unit complete
18100 New GLM aftermarket Mercruiser Alpha 1 lower unit
1
# 18100 GLM Marine aftermarket Mercruiser Alpha 1 lower gear housing lower unit outdrive complete assembly years 1983 thru 1992 with 1 year limited warranty. No core deposit required price based on customer pick up

$995.79

 
1
# 18100 Alpha lower unit as above includes (packing 18.00), shipping and insurance to contenental USA or Canada *Note we will paypal refund partial shipping cost if less then 136.00 we go by 2007 UPS pubished rates (416-752-7326)

*UPS ground service and packing $1136.79

TM 12410 Alpha 1 water pump housing
12410 Alpha 1 water pump housing
2
# 12410 Water pump housing
 (Included in water pump kit)

  $28.79

TM 12810 Alpha 1 water pump cup
12810 Water pump cup
3
# 12810  Cup
(*NOT included in water pump kit)

  $4.79

TM 89840 Alpha 1 impeller
89840 alpha 1 impeller
4
# 89840 Water pump impeller 
(Included in water pump kit)

  $18.79

TM 23200 Alpha 1 retainer
23200 Alpha lower unit retainer
5
# 23200 Retainer for drive shaft bearing 
OEM# 824519-1

  $4.79

TM 12833 Alpha 1 screw
12833 screw
6
# 12833 Screw for wear plate cover 
OEM# 10-96411

  $4.79

TM 21180 Alpha 1 lock nuts
21180 lock nuts
7
# 21180 Lock nuts (5 units)
OEM# 11-13438

  $5.79

TM 12830 Alpha 1 seal
12830 seal water pump
8

# 12830 Seal (Included in water pump kit)

 
TM 12820 Alpha 1 guide tube
12820 water tube guide
9

# 12820 Tube guide
(Included in water pump kit)

 
TM 81160 Alpha 1 o ring for drive shaft
81160 o ring for drive shaft
10
# 81160 O-ring (5 units)
(Included in water pump kit)
 
TM 21190 Alpha 1 lock nuts
21190 lock nuts
11
# 21190 Lock nuts (5 units)
OEM# 11-13436

  $5.79

TM 21720 Alpha 1 washers
21720 Washers
12
# 21720 Washer set (3 units)
OEM# 12-36001

  $4.79

TM 11070 Alpha 1 Impeller key
11070 Impeller keys (5 units)
13
# 11070 Impeller keys (1unit)
OEM# 28-56654

  $4.79

TM 31020 Alpha 1 water pump to wear plate gasket
31020 wear plate gasket
14
# 31020 Gasket 
(Included in water pump kit)
 
TM 12510 Alpha 1 impeller wear plate
12510 impeller wear plate
15
# 12510 Wear plate
(Included in water pump kit)
 
 
16
# 31010 Gasket for wear plate
(Included in water pump kit)
 
TM 12320 Alpha 1 water pump base
12320 water pump base
17
# 12320 Water pump base
(Included in water pump kit)
 
TM 85040 Alpha 1 oil seal
oil seal
18
# 85040 Oil seal
(Included in water pump kit)
 
TM 85070 Alpha 1 oil seal
85070 oil seal
19
# 85070 Oil seal
 

  $9.79

 
20
# 81390 O-ring
(Included in water pump kit)
 
TM 82270 Alpha 1 o-ring
82270 O-ring 2.125 inch id
20B
# 82270 Water pump o-ring
(Included in water pump kit)
 
TM 21580 Alpha 1 bearing
21580 Bearing
22
# 21580 Tapered roller bearing for drive shaft MR/Alpha One/Gen 2
OEM# 31-36387A1

  $34.79

TM 23210 Alpha 1 drive shaft bearing shim kit
23210 drive shaft bearing shim kit
23
# 23210 Shims
OEM# 15-42637A1

  $5.79

TM 21800 Alpha 1 washers
21800 washers
24
# 21800 Washer set (5 units)
OEM# 12-29395

  $4.79

TM 30010 Alpha 1 outdrive gasket
30010 gasket
25
# 30010 Washer gaskets
OEM# 12-31266

  $4.79

TM 85581 Alpha 1 oil seal
85581 oil seal
26
# 85581 Oil Seal
(Included in seal kit)
 
TM 21010 Alpha 1 bushing assembly
21010 bushing assembly
27
# 21010 Shift bushing assembly
(Included in seal kit)
 
TM 81180 Alpha 1 o ring
81180 o ring
28
# 81180 O-Ring
(Included in seal kit)
 
TM 32790 Alpha 1  washers
32790 washers
29
# 32790 Washer set (10 units)
OEM# 12-27880

  $4.79

TM 21132 Alpha 1 outdrive clip
21132 clip
30
 # 21132 Clip
OEM# 18-20233

  $4.79

TM 21030 Alpha 1 lower shift shaft
21030 Lower Shift Shaft
31
# 21030 Shift shaft
OEM# 77481-1

  $24.79

17
TM 85140 Alpha 1 oil passage seal
85140 Alpha 1 oil passage seal
32
# 85140 Oil passage seal
(5 units) OEM# 26-45577-1
(Included in seal kit)

  $9.79

TM 21731 Alpha 1 draining screw set
21731 Draining screw set
33
# 21731 Oil plug drain screw  magnetic
OEM# 22-67892A1

  $5.79

TM 31170 Alpha 1 gasket for housing drain screw
31170 Gasket for housing drain screw
34
# 31170 Washer
(Included in seal kit)
 
TM 21870 Alpha 1 starboard insert screen
Insert screen starboard
35

# 21870 Insert screen (stbd)
OEM# 93423-1

  $4.79

TM 21880 Alpha 1 port screen
Insert screen port
36
# 21880 Insert screen (port)
OEM# 93424-1

  $4.79

TM 12822 Alpha 1 insert screen screw
12822 screw
37
# 12822 Screw (5 units)
OEM# 10-76156

  $9.79

TM 21161 Alpha 1 stainless steel lock nut
21161 stainless steel lock nut
38
# 21161 Lock nut
OEM# 11-45812

  $4.79

TM 21170 Alpha 1 lock nuts
21170 Lock nuts 5 units
39
 # 21170 Lock nuts  5 units
OEM# 11-13439-1

  $9.79

TM 21740 Alpha 1 allen bolt stainless
21740 screws
40
# 21740 Screw
OEM# 10-32470

  $4.79

 
41
# 22430 Screw
OEM# 10-30206

  $4.79

TM 12670 Alpha 1 aluminum trim tab anode
12670 Anode
42
# 12670 Trim tab anode
OEM# 31640A1

  $9.79

TM 21610 Alpha 1 bearing
21610 Drive shaft pinion bearing
43
# 21610 Roller bearing for pinion gear
OEM# 31-42647A1

  $31.79

TM 11091 Alpha 1 13 21 ratio gear set
#11091 Alpha 13-21 ratio gear set #21590 bearing
44A
# 11091 Alpha Forward and pinion gear set 13-21 ratio with #21590
3.500" OD bearing

  $357.79

  Used $137.79

TM 11190 Alpha 1 pinion nut
11190 pinion nut
45
# 11190 Pinion nut 
OEM# 11-35921

  $4.79

TM 11030 Alpha 1 shift spool
11030 shift spool
46
# 11030 Shift spool OEM # 818349T1

  $58.79

TM 11040 Alpha 1 shift crank
11040 Shift crank
47
# 11040 Shift crank 
OEM# 76865

  $52.79

TM 23220 Alpha 1 forward gear shims
23220 Alpha one shims
48
OEM # 15-47397A1

  $6.79

TM 21590 Alpha 1 forward bearing
21590 Bearing 1.875
49
# 21590 Tapered roller bearing (I.D. 1.875)
OEM# 31-35928T1

  $46.79

TM 21591 Alpha 1 roller bearing
21591 Bearing 1-.750
49b
# 21591  Tapered bearing  for forward gear - small bearing (I.D. 1.750)
OEM# 31-828437A2

  $88.79

TM 11420 Alpha 1 forward gear roller bearing
11420 roller bearing
50
# 11420 Needle roller bearing for forward gear
OEM# 31-30895

  $9.79

TM 11050 Alpha 1 clutch dog spring
11050 spring
51
OEM# 24-30893

  $4.79

TM 21131 Alpha 1 cross pin
21131 Cross pin
52
# 21131 Cross pin OEM # 17-30632

  $4.79

TM 11060 Alpha 1 clutch dog
11060 Alpha clutch dog
53
# 11060 Alpha Clutch dog
OEM# 52-853594T

  $151.79

TM 11150 Alpha 1 Prop Shaft
11150 Alpha propeller shaft
54
# 11155 Prop shaft for MC-1 /R / MR / Alpha One / Gen 2
OEM# 44-850308
 
Replaces #11150 (OEM # 44-824110)

  $329.79

TM 11013 Alpha1 reverse gear
11013 Reverse gear
55
# 11013 Reverse gear with thrust spacer
OEM# 43-828073A1

  $94.79

TM 23140 Alpha 1 thrust ring
23140 thrust ring
56
# 23140 Thrust ring OEM # 68100-1

  $7.79

TM 21620 Alpha1 reverse gear ball bearing
Alpha carrier ball bearing
57
# 21620 Ball bearing
OEM# 30-88957T

  $29.79

TM 83445 Alpha 1 o ring
83445 Alpha 1 o-ring
58
 # 83445 O-ring
(Included in seal kit)
 
TM 11410 Alpha 1 Bearing carrier roller bearing
11410 Bearing carrier roller bearing
59
# 11410 Needle roller bearing for propshaft bearing carrier
OEM# 31-30956 

  $9.79

TM 11410 Alpha1 Bearing carrier roller bearing
Alpha One bearing carrier
60
# 11405 GLM aftermarket bearing carrier assembly
OEM# 818763A10

  $116.79

TM 85130 Alpha 1 oil seal
61
# 85130 Oil seal inside 
(Included in seal kit)
 
TM 85700 Alpha 1 oil seal outside
85700 oil seal outside
62
# 85700 Oil seal outside 
(Included in seal kit)
 
TM 32800 Alpha 1 shim kit washer
32800 shim kit washer
63
# 32800 Washer (2 units)
OEM# 12-92721

  $4.79

TM 11381 Alpha 1 tab washer
11381 tab washer
64
# 11381 Tab washer
OEM# 14-18323

  $11.79

TM 21120 Alpha 1 prop cover nut
21120 Cover nut
65
# 21120 Cover nut
OEM# 79448

  $17.79

TM 21301 Alpha 1 thrust hub
21301 thrust hub
66
# 21301 Thrust hub OEM # 12-825467

  $22.79

 
67
# 21760 Lockwasher
OEM# 13-42351-1

  $4.79

TM 21360 Alpha 1 tab washer reciever
21360 Tab washer reciever
68
# 21360 Tab washer reciever OEM # 12-31211A3

  $7.79

TM 21210 Mercruiser Alpha 1 tab washer
21210 tab washer
69
# 21210 Tab washer OEM # 14-31210

  $4.79

90065 Prop wrench kit with nut tab washer
90065 Prop wrench kit with nut tab washer
70B
# 90065 Prop wrench kit (It floats)

  $12.79

TM 21230 Alpha 1 propeller nuts
21230 propeller nuts
70A
# 21230 Prop nut (1 unit)
OEM # 11-827614

  $6.79

TM 11120 Alpha 1 drive shaft
11120 Mercruiser alpha one drive shaft
71
# 11120 Drive shaft for MR/Alpha drives w/o preload pins
OEM# 45-42634

  $383.79

TM 21330 Alpha 1 slinger
21330 slinger
72
# 21330 Slinger
(Included in water pump kit)
OEM# 25-30271

  $4.79

TM 21490 Alpha 1outdrive washers
21490 Washers
73
# 21490 Washer (10 units)
OEM# 12-29245

  $7.79

TM 11012 Alpha 1 thrust spacer
11012 Thrust spacer
74
# 11012 Thrust spacer
OEM# 23-824108

  $4.79

TM 12702 Alpha 1 anode
12702 anode
75
# 12702 Anode
OEM# 806105A1

  $14.79

 
76
# 11080 Key (5 units)
OEM# 28-30281

  $5.79

 
77
# 21413 Dowel pin
OEM# 17-35973

  $5.79

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