Alpha One & Gen 2 Outdrive Parts *Drawings *Videos

Mercruiser Alpha 1 parts drawing *Lower unit 1-34

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 Upper gear case exploded view Alpha One drawings click here

Picture	Description
87510 seal kit	A P/N 87510 Seal kit (lower unit) gear-case 26-33144A2 $44.99
25125 seals gears bearings shims 13-21	B P/N 25125 Seal, bearing and gear set 43-803091T1 $699.99
25120 Alpha seal kit shims bearings	C P/N 25120 Seal and bearing set with P/N 21570 upper bearing $267.99
12120 water pump	D P/N 12120 Water pump set $42.99
18000 Alpha 1 lower case only	1 P/N 18000 Lower gear housing (Case only) call for price and availability
Alpha 1 lower unit complete	P/N SE109 SEI Marine aftermarket lower unit replacement outdrive complete assembly years 1972 to 1990 $1125.99
12410 housing	2 P/N 12410 Water pump housing $29.95
12810 cup	3 P/N 12810 Cup $5.95
89840 Alpha 1 Water pump impeller	4 P/N 89840 Water pump impeller $16.99
23200 retainer	5 P/N Retainer for drive shaft bearing 824519-1 $4.95
12833 screw	6 P/N 12833 Screw for wear plate cover 10-96411 $4.95
21180 lock nuts	7 P/N 21180 Lock nuts (5) 11-13438 $9.95
12830 seal	8 P/N 12830 Seal
12820 guide tube	9 P/N 12820 Tube guide
81160 o ring for drive shaft	10 P/N 81160 o ring (5)
21190 lock nuts	11 P/N 21190 Lock nuts (5) 11-13436 $9.95
21720 washers	12 P/N 21720 Washer set (3) 12-36001 $4.95
11070 Impeller key	13 P/N 11070 Impeller keys (1) 28-56654 $9.95
31020 Alpha 1 water pump to wear plate gasket	14 P/N 31020 Gasket
12510 impeller wear plate	15 P/N 12510 Wear plate
	16 P/N 31010 Gasket for wear plate
12320 base	17 P/N 12320 Water pump base
85040 oil seal	18 P/N 85040 Oil seal
85070 Alpha 1 oil seal	19 P/N 85070 Oil seal $12.99
81390 O-rings	20 P/N 81390 o ring
82270 Alpha 1 O-ring	20B P/N 82270 Water pump o ring
21580 bearing	22 P/N 21580 Tapered roller bearing for drive shaft MR/Alpha One/Gen 2 OEM 31-36387A1 $46.99
23210 drive shaft bearing shim set	23 P/N 23210 Shims 15-42637A1 $16.95
21800 washers	24 P/N 21800 Washer set (5) 12-29395 $4.95
30010 outdrive gasket	25 30010 Washer gaskets OEM# 12-31266 $4.95
85581 oil seal	26 P/N 85581 Oil Seal
21010 bushing assembly	27 P/N 21010 Shift bushing assembly
81180 OMC O-rings	28 P/N 81180 O-Ring
32790 washers	29 P/N 32790 Washer set (10) 12-27880 $4.95
21132 outdrive clip	30 P/N 21132 Clip 18-20233
21030 lower shift shaft	31 P/N 21030 Shift shaft 77481-1 $43.99
17 85140 oil passage seal	32 P/N 85140 Oil passage seal (5) 26-45577-1 $9.95
21731 draining screw set	33 P/N 21731 Oil plug drain screw magnetic 22-67892A1 $9.99
31170 Alpha 1 gasket for housing drain screw	34 # 31170 Washer

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