Mercruiser outdrive parts *Alpha 1 lower unit *Repairs

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Mercruiser outdrive parts drawing 51-77

Lower unit outdrive with exploded view breakdown drawing

  • Alpha One (Generation 1 up to 1990) and Mercruiser outdrive lower unit components
  • Drive shaft, propeller shaft
  • Water pump kits, oil seals
  • GLM aftermarket numbers with OEM Mercury cross reference

Mercruiser gearcase exploded view 51-77

Photo
Description / OEM #
Price
(USD)
Price (Canadian)
21131 Cross pin 17-8M0020941

21131 Cross pin

Item 51
P/N 21131
Cross pin

17-8M0020941

$4.95

$5.95

11060 Clutch dog 52-853594T

11060 Clutch dog

Item 52
P/N 11060
Clutch dog

52-853594T

$225.95

$297.95

Propeller Shafts
Propeller Shafts
Item 53
P/N 11155
Propeller shaft

44-850308

$660.95

$871.95

23290 Shims 15-97166

23290 Shims

Item 54
P/N 23290
Shim

15-97166

$4.95

$5.95

23141

23141

Item 55A
P/N 23141
Thrust ring (1970 - 1982)

35915

$26.95

$35.95

23140-68100-1

23140

Item 55B
P/N 23140
Thrust ring (1983 and up)

26-816575A2

$11.95

$15.95

21620 Reverse 30-88957T

21620

Item 56
P/N 21620
Bearing

30-88957T

$37.95

$49.95

83445-25-896524

83445

Item 57
P/N 83445
O-rings (5 units)

25-896524

$10.95

$12.95

11410 Prop shaft 31-30956T

11410

Item 58
P/N 11410
Prop shaft bearing

31-30956

$10.95

$12.95

11405 Bearing carrier 818763A10

11405 Bearing carrier

Item 59
P/N 11405
Bearing carrier

818763A10

$157.95

$207.95

85130-26-14077

85130

Item 60
P/N 85130
Oil seal (inside)

26-14077

$7.95

$9.95

85700-26-12224

85700

Item 61
P/N 85700
Oil seal (outside)

26-12224

$12.95

$16.95

11080 Key 28-30281

11080 Key

Item 62
P/N 11080
Key

28-30281

$4.95

$5.95

11380-14-79447

11380

Item 63
P/N 11380
Keyed washer

*For gears, see part number 43

14-79447

$6.95

$8.95

21120 Cover nut retainer 52699

21120

Item 64
P/N 21120
Cover nut

8M2011027

$18.95

$24.95

21301 Thrust hub 12-835467-1

21301 Thrust hub

Item 65
P/N 21301
Thrust hub

12-835467Q01

$22.95

$28.95

21760-13-42351-1

21760

Item 66
P/N 21760
Lockwasher

13-42351-1

$5.95

$6.95

21360 Receiver-12-31211Q03

21360 Receiver

Item 67
P/N 21360
Washer

12-31211Q03

$6.95

$8.95

21200 Tab washer 14-816629Q

21200

Item 68
P/N 21200
Tab washer

14-816629Q

$4.95

$5.95

21230 Propeller nut 11-52707Q1

21230 Propeller nut

Item 69
P/N 21230
Lock nut

11-52707Q1

$8.95

$11.95

Drive Shafts
Drive Shafts

Item 70
P/N 11110
Drive shaft with pre-load pin at top (1967 - 1983 only, serial numbers 2791957-6225576)

45-41939F1

$432.95

$570.95

 

Item 70B
P/N 11120
Drive shaft (19984 - 1990, serial numbers 6225577 - 0D469858)

45-42634

$533.95

$704.95

21330 Slinger 25-30271

Item 71
P/N 21330
Slinger

25-30271

$4.95

$5.95

 

Item 72
P/N 11020
Reverse gear (1972 - 1982, serial numbers 3469428-6225576)

43-92320T

$389.95

$514.95

 

Item 73
P/N 21413
Dowel pin

17-35973

   
12110

12110 Water pump kit

Item 74A
P/N 12110 Water pump kit (1970 - 1983, serial numbers 2763442-6854392)

$44.95

$54.95

12120

12120 Alpha 1 pump

Item 74B
P/N 12120 Impeller kit with housing (1984 - 1990 Alpha One serial numbers 6854393-OD469858)

$37.95

$47.95

 

Item 76
P/N 12754
Aluminum anode kit

888756Q04

$25.95

$33.95

87510 Seal kit
87510 seal kit
Item 77
P/N 87510 Seal kit

26-33144A2

$38.95

$50.95