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

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Mercruiser Alpha One parts drawing *Lower unit 35-55

Lower gear-case part number with exploded view
outdrive drawing

  • 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
  • Components have 1 year warranty
  • Parts 35 to 55

Exploded view Alpha 1 drawings
Search by part number or description here

lower gear case layout

lower gear case layout

87510  seal kit
87510 seal kit
A
P/N 87510
 seal kit lower gear-case OEM 26-33144A2 $45.29

25125 seals gears bearings shims 13-21
25125 seals gears bearings shims 13-21
B
P/N 25125
Seal, bearing and gear kit / 43-803091T1 $661.89

25120 seal kit shims bearings
25120 seal kit shims bearings
C
P/N 25120
Seal and bearing kit with P/N 21570 upper bearing $224.89

12120  water pump
12120 water pump
D
P/N 12120
Water pump kit $37.29

21870 starboard insert screen

21870 starboard insert screen

35
P/N 21870
Insert screen starboard / 93423-1 $4.89

21880 port screen
21880 port screen
36
P/N 21880
Insert screen (port) / 93424-1 $4.89

12822 insert screen screw
12822 insert screen screw
37
P/N 12822
Screw (5 units) / 10-76156 $9.89

21161 stainless steel lock nut
21161 stainless steel lock nut
38
P/N 21161
Lock nut / 11-45812 $4.89

21170 lock nuts
21170 lock nuts
39
P/N 21170
Lock nuts 5 units / 11-13439-1 $9.09

21740 allen bolt stainless
21740 allen bolt stainless
40
P/N 21740
Screw / 10-32470 $4.89

 
41
P/N 22430
Screw / 10-30206 $4.89

12670 aluminum trim tab anode
12670 aluminum trim tab anode
42
P/N 12670
Trim tab anode / 31640A1 $9.89

21610 bearing
21610 bearing
43
P/N 21610
Roller bearing for pinion gear / 31-42647A1 $43.15

11091 Alpha
11091 Alpha

44A
P/N 11091
lower unit forward and pinion gear set 13-21 ratio with P/N 21590 3.500" OD bearing $629.95

11190 pinion nut
11190 pinion nut
45
P/N 11190
Pinion nut / 11-35921 $4.89

11030 shift spool
11030 shift spool
46
P/N 11030 Shift spool / 818349T1 $86.95

11040 shift crank
11040 shift crank
47
P/N 11040 Shift crank / 76865 $67.95

23220 shims
23220 shims
48
P/N 23220
Forward gear shims / 15-47397A1 $11.95

21590 forward bearing
21590 forward bearing
49
P/N 21590
Tapered roller bearing (I.D. 1.875) OEM 31-35928T1 $59.95

21591 roller bearing
21591 roller bearing
49B
P/N 21591
Tapered bearing for forward gear - small bearing (I.D. 1.750) OEM 31-828437A2 $115.95

11420 forward gear roller bearing
11420 forward gear roller bearing

50
P/N 11420
Needle roller bearing for forward gear / 31-30895 $14.95

11050 clutch dog spring
11050 clutch dog spring
51
P/N 11050
Clutch dog spring / 24-30893 $4.89

21131 cross pin
21131 cross pin
52
P/N 21131
Cross pin / 17-30632 $4.89

11060 clutch dog
11060 clutch dog
53
P/N 11060
Clutch dog / 52-853594T $129.00

11150 prop shaft
11150 prop shaft
54
P/N 11155
Prop shaft for MC-1 /R / MR / Alpha One / Gen 2 / 44-850308 Replaces P/N 11150 (/ 44-824110) $660.95

11013 reverse gear
11013 reverse gear
55
P/N 11013
Reverse gear with thrust spacer OEM 43-828073A1 $97.89