Alpha 1 & Gen. 2 Outdrive Parts *Drawings *Videos

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Mercruiser Alpha One parts drawing *Lower unit 56-77

Lower gearcase part numbers 56 to 77 exploded view
outdrive drawing

Exploded view Mercruiser Alpha one drawings
Search by part number or description here

lower gear case drawing

lower gear case drawing

87510 26-33144A2
87510

12120 Alpha 1 water pump

12120 Alpha 1 water pump

P/N 12120 Water pump kit (1984-1990) MR/Alpha One $35.95

23140 thrust ring
23140 thrust ring

56
P/N 23140 Thrust ring OEM 68100-1 $11.95

21620 carrier ball bearing
21620 carrier ball bearing

57
P/N 21620 Ball bearing / 30-88957T $28.00

83445 o ring
83445 o ring

58
P/N 83345
O rings (5) / 25-31534 $7.15

11410 drive shaft bearing
11410 drive shaft bearing

59
P/N 11410
Bearing / 31-30956 $10.00

11405 bearing carrier

11405 bearing carrier

60
P/N 11405
Bearing carrier / 818763A10 $99.00

85130 Oil seal
85130 Oil seal

61
P/N 85130
Oil seal (inside) / 26-14077 $7.00

85700 oil seal
85700 oil seal

62
P/N 85700
Oil seal (outside) / 26-12224 $12.95

32800 shim kit washer
32800 shim kit washer

63
P/N 32800
Washers / 12-92721 $4.00

11381 tab washer
11381 tab washer

64
P/N 11381 washer / 14-18323 $14.95

21120 prop cover nut
21120 prop cover nut

65
P/N 21120 Cover nut / 79448 $18.95

21301 thrust hub
21301 thrust hub

66
P/N 21301 Trust hub OEM part number 12-825467 $21.00

21760 lockwasher
21760 lockwasher

67
P/N 21760 Lock-washers / 13-42351-1 $4.00

21360 tab washer receiver
21360 tab washer receiver

68
P/N 21360
Tab washer receiver / 12-31211A3 $7.00

21210 tab washer
21210 tab washer

69
P/N 21210 Tab washer / 14-31210 $4.00

21230 lock nut
21230 lock nut

70
P/N 21230
Prop nut / 11-827614 $9.00

hardware
hardware

70B
P/N
Propeller hardware parts please click on picture

11120 drive shaft
11120 drive shaft

71
P/N 11120
Drive shaft (1970 - 1990) / 45-42634 $533.95

71B
P/N 11140
Drive shaft (1991 - up) /45-816919, 45-816472, 45-853647 $529.95

21330 slinger
21330 slinger

72
P/N 21330
Slinger / 25-30271 $4.00

21490 washers
21490 washers

73
P/N 21490
Washer (10 units) / 12-29245 $4.00

12702 anode
12702 anode

74
P/N 11012
Thrust spacer / 23-824108 $4.95

11080 bearing carrier key
11080 bearing carrier key

76
P/N 12702
Anode (for prop shaft carrier, 1991 and up) / 806105A1 $39.95

21413 dowel pin
21413 dowel pin

77
P/N 11080
Key / 28-30281 $4.00