Mercruiser outdrive parts drawing *Videos *SEI sterndrive

Lower unit Mercruiser parts *Outdrive parts drawing 1 to 43

GLM products are completely compatible and interchangeable with Mercruiser sterndrive components. GLM has committed to producing high quality and cost effective aftermarket Mercruiser parts for the past two decades New to our product line are propellers and hub sets. Tech support Exploded view Mercury / Mercruiser Alpha One outdrive drawings

Mercruiser MC-1-R lower unit gearcase parts drawing years 1972 to 1982
Mercruiser propeller	A Mercury propellers from Solas
SEI Marine Alpha 1 lower unit complete	1B  SEI Marine aftermarket complete lower unit parts Outdrive years 1972 to 1990 with 3 year limited warranty. No core deposit required. $1199.99
87510 Seal kit lower gearcase	P/N 87510 Seal and gasket kit $49.89 GLM 87510 Mercruiser OEM number 26-33144A2  Lower unit seal kit $38.95 M1 / R / MR / Alpha 1 years 1964 to 1990 Serial numbers 1684188 - OD469858 The following parts included: P/N 12830 Seal 25-39970 P/N 81160 O-ring 25-30613 P/N 81390 O-ring 25-90011 P/N 81180 O-ring 25-25439 P/N 31020 Gasket 25-858524 P/N 31050 Gasket 27-42631-1 P/N 31010 Gasket 27-85608-1 P/N 85040 Oil seal 26-16977 P/N 85070 Oil seal 26-89238 P/N 85700 Oil seal 26-12224 P/N 85581 Oil seal 26-816464 P/N 85140 Seal 26-45577-1 P/N 21330 Slinger 25-30271 P/N 21010 bushing parts 23-30617A2 For 1991 and newer models, use Mercury part 26 816575A3.
25125 Alpha gears bearings shims 13-21	P/N 25115 Seals, bearings and gear set parts included in kit Mercruiser OEM number 43-803079T1 $463.89 contains the following parts included: Gear set 43-96084A4 Sliding clutch dog 52-66063 Roller bearing 3130895 Ball bearing 30-88957A1 Tapered bearing 31-35928A1 Shim kit 15-47397 Pinion nut 11-35921 Tab washer 14-79447 Seal kit #87510 26-32511A1 GLM Marine aftermarket tools that may be required for repairs are: drive shaft adaptor and pinion nut adaptor Part number 90220 drive shaft adaptor tool provides a wrench surface to turn the drive shaft when installing the drive shaft pinion nut. Part number 90210 pinion nut adaptor kit holds pinion nut when removing pinion gear, pinion gear nut and Mercruiser drive shaft on outdrive unit years 1972 and up
25110 shims bearings upper gearcase	C Part number 25110 Seal, shims and bearings set 31-803068T1 $269.99
12110 water pump	P/N 12110 Water pumps for outdrive years 1970 thru 1983 Mercruiser models, Mercruiser 1 / R Serial numbers 2763442 - 6854392 $51.89 GLM Marine aftermarket parts includes: P/N 89840 / 47-89984T4 Impeller P/N 12510 / 32435 Wear plate P/N 12310 / 46-57234T1 water pump base P/N 31010 / 27-85608-1 Gasket P/N 11070 / 28-56654 Key P/N 12410 / 46-96148T1 Water pump housing P/N 12820 / 23-29804T Guide tube P/N 12810 / 48752 Cup
12130 serial number 2062141 to 2791956	P/N 12130 GLM Marine water pump assembly with flush screw. $95.99 Compatible with the Mercruiser 1 model years 1965 - 1969. Mercruiser serial numbers 2495186 - 2763441 The following parts includes: P/N 89840 / 47-89984T4 Water pumps impeller P/N 11070 / 28-56654 Key P/N 12410 / 46-96148T1 Pump housing P/N 12333 / 46-48748T1 Pump base P/N 12820 / 23-29804T Guide tube P/N 12810 / 48752 Pump cup P/N 12510 / 32435 Wear plate P/N 31010 / 27-85608-1 Gasket
12410 housing	2 Part number 12410 Water pump housing $29.95
12810 Cup OEM 48752	# 12810 Water pump cup for the MC-1/R $5.95
89840	4 P/N 89840 Mercruiser impeller $18.89 GLM 89840 OEM 47-89984-2 Mercury impeller Mercruiser 1 / R / Alpha 1 (1967 - 1990
21720 Alpha 1 washers	5 Manufacturer part number 21720 Washers - parts sold in units of three $4.95
12821 Bolt	6 P/N 12821 Screw for the water pump cover $10.95
21180 lock nuts	7 GLM part number 21180 Nuts *5 parts included $14.89
12830	8 # 12830 Seal (included in seal kit P/N 87510 shown above)
12820 guide tube	9 Part number 12820 Guide tube for MC-1/R/MR/Alpha 1 Gen 1 (qty 1) $6.95
81160 o-ring for drive shaft	10 # 81160 O-ring $4.95
21190 lock nuts (5 parts included)	11 P/N 21190 Nuts (5 parts included) OEM 11-13436 $9.95
21490 Washers	12 # 21490 Washers *10 parts included $15.95
11070 impeller key	13 # 11070 Key *1 unit 28-56654 $9.95
31020	Item 14 P/N 31020 Gasket water pump gasket
12510 impeller wear plate	15 # 12510 wear plate
31010 lower wear plate gasket	16 # 31010 Gasket
12310 GLM pump base	17 # 12310 Water pump base
85040 oil seal	18 P/N 85040 Oil seal $12.89
85070 oil seal	19 # 85070 Oil seal $10.95
81390 o ring water pump base	20 # 82260 O-ring
31040 pump base to gear housing	21 # 31040 Gasket
21570 bearing	22 P/N 21570 Roller bearing. Replaces 31-53079A1. $30.89
23300 shim	P/N 23300 Shim parts set *5 units $7.95
21800 washers	24 # 21800 Washer *5 parts included Mercruiser OEM number 12-29395 $4.95

30010 gasket	Item 25 P/N 30010 Shift shaft gasket washer (5 units) OEM 12-31266 $7.89
85581 oil seal	Item 26 P/N 85581 Oil Seal $11.89 *Included in P/N 87510 parts*
21010 bushing assembly	Item 27 P/N 21010 Bushing assembly *Included in P/N 87510 seal kit
81180 o-ring shifter	Item 28 P/N 81180 O-Ring *Included in P/N 87510 parts
32790 washers	Item 29 P/N 32790 Washer *10 units OEM 12-27880 $4.95
21132 clip	Item 30 P/N 21132 Clip OEM 18-20233 $4.95
21030 lower shift shaft	Item 31 P/N 21030 Shift shaft OEM 77481-1 $37.95
85140 Oil passage seal	Items 32 P/N 85140 Seal OEM 26-45577-1 (5 units) $9.95 Included in P/N 87510 parts
Lower unit oil pump	Items 33A P/N 401-11245-1 Mercruiser lower unit oil pump $19.89
21731 Draining set	Item 33B P/N 21731 Oil plug magnetic drain screw OEM 22-67892A1 $10.89
31170 Gasket for housing drain	Item 34 P/N 31170 Washer gasket $14.89. Included in seal kit P/N 87510
21870 insert screen	Item 35 P/N 21870 Insert screen (stbd) OEM 93423-1 $5.99
21880 insert screen	Item 36 P/N 21880 Insert screen port side OEM 93424-1 $5.99
12822	Item 37 GLM part number 12822 Screw *5 units OEM 10-76156 $9.95
21161 stainless steel lock nut	Item 38 P/N 21161 Stainless steel lock nut OEM 11-45812 $4.95
21170 Lock nuts 5 units	Item 39 P/N 21170 Lock nuts *5 units OEM 11-13439-1 $14.89
21740	Item 40 P/N 21740 trim tab screw (1 unit only) OEM 10-32470 $9.89
22430 Allen bolt	Item 41 P/N 22430 Bolt OEM 10-30206 $4.95
12670 Anode	Item 42 P/N 12670 Trim tab anode OEM 31640A1 $14.89
21600 bearing	Item 43A P/N 18-1150 Drive shaft OEM 31-92366A1 MC-1 / R serial 4893835 - 62255757 $75.29
21610 Drive shaft pinion gear bearing	Item 43B P/N 21610 Drive shaft pinion bearing OEM 31-42647A1 MR / Alpha 1 serial 6225577 and up $43.95

21450 Shift cable 865436A03	P/N 21450 Complete outdrive shift cable kit. Includes cable, shift bellow, outdrive installation gasket kit and other parts. Replaces Mercury 865436A03 and Sierra 18-2603. $89.99
21950	P/N 21950K *most popular* Same kit as above, also includes bellows adhesive glue and hinge pin removal/installation tool $199.99
Complete repair kit	P/N 21960K *most popular For Generation 2 models only, 1991 and up. Also includes bellows adhesive glue and hinge pin removal/installation $219.99
12120 Impeller kit	P/N 12120 Mercruiser Alpha One Gen 1 impeller water pump kit, for 1984-1990 models, serial numbers 6854393-OD469858. Replaces OEM and Sierra 18-3320. $48.89

Need Tech support Technical support, 5 stars, is available from Wayne our tech service rep in person Toronto, Canada location Search on YouTube videos by Wayne Coll or T.C. Electronics/Marine. Make sure to click like on the video if you find it useful. there is about 72 boat repair video in total as of 2019 there is no charge to view Example of videos on YouTube Mercruiser outdrive shift cable and bellows repairs 593,228 views Water pump removal and repair video 320,214 views How do I remove my Alpha One gen 2 lower unit 76,350 views 65 repair video on YouTube for Mercury Marine outboard or Mercruiser outdrive parts Need help to identify your Mercruiser outdrive not sure what sterndrive unit you require Parts 25 to 43 44 to 57 58 to 73

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