Mercruiser Alpha one water pump kit *Repair video

Mercruiser outdrive water pumps and engine water circulating pumps

Last updated on 12/08/2023, 01:17:46

  • Compatible with all Chevy/GM and Ford inboard motors and all Mercruiser Alpha one gen 1 models 1984 and up repair kit sets
  • Kit for Mercruiser water pump kit part number 12120 and 88020 include the key – most competitor do not include this part
  • Full 2 year warranty on all GLM Marine products including water pump impeller kits and impellers
  • Make sure to grease the drive shaft when installing the pump housing and impeller, and use a gasket sealant on the gaskets
  • GLM drive shaft adaptor tool can be used to turn drive shaft clockwise when fitting pump housing and impeller together
  • Ships to United States, United Kingdom, Canada

Lower Unit - Outdrive Water Pumps

Please click on photo for exploded view

12120 Alpha One

P/N 12120 Alpha 1 lower unit water pump / seal kit combination 1984-1990. $42.99
(1984 – 1990) S/N 6854393 – OD469858
Includes:
P/N 89840 Impeller 47-89984T4
P/N 12410 housing 46-96148T1
P/N 12322 Base 46-44292A3
P/N 12510 Wear plate 32435
P/N 11070 Key 28-56654
P/N 12820 water tube 23-29804T
P/N 12810 Cup 48752
P/N 31010 Gasket 27-85608-1

Sierra 18-3320 R MR Mercruiser Alpha One

Sierra / Teleflex 18-3320 / 1984 – 1990. #46-44292A5. $69.99
Includes:
Water pump kit 47-89984T4
water pump housing 46-96148T1
Pump base 46-44292A3
Wear plate 32435
Key 28-56654
Guide tube 23-29804T
Cup 48752
Gasket 27-85608-1

88020 Mercruiser rebuild service kit

88020 Sterndrive pump 1984-1990

P/N 88020 Complete stern drive rebuild set $119.99
(1984 – 1990) Kit for Mercruiser S/N 6225577 – OD469858
*Includes all seals for upper housing and lower unit

Parts included:

P/N 89840 Water pump impeller 47-89984T4
P/N 12410 Pump housing 46-96148T1
P/N 12322 Pump base 46-44292A3
P/N 12510 Wear plate 32435
P/N 11070 Key 28-56654
P/N 12820 Guide tube 23-29804T
P/N 12810 Cup 48752
P/N 31010 Gasket 27-85608-1
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 31010 Gasket 27-85608-1
P/N 31050 Gasket 27-42631-1
P/N 85040 Oil seal 26-16977
P/N 85070 Oil seal 26-89238
P/N 85581 Oil seal 26-816464
P/N 85700 Oil seal 26-12224
P/N 85140 Seal 26-45577-1
P/N 12830 Seal 25-39970
P/N 21330 25-30271
P/N 80420 O-ring 25-32546
P/N 80190 O-ring 25-55801
P/N 81180 O-ring 25-25439
P/N 82380 O-ring 25-70937
P/N 85020/85060/85030 Oil seals 26-32511/26-96503/26-823894
P/N 31150 Gasket 27-55810-1
P/N 85150 Grommet 26-36557

89840 Impeller Mercruiser 1967-1990

89840 Mercruiser R MR Alpha one replacement water pump impellers $16.99

11070 Key 1967-1990

11070 Mercruiser R MR Alpha One replacement key OEM 28-56654 $3.95
Sierra / Teleflex 18-3147 Rebuild set for Generation 2 – 1991 and up $149.15

12290 Impeller gasket kit OEM 47-89984T5

12290 Impeller, o rings, guide tube and gaskets service kit for Mercruiser 1970 – 1990. OEM number 47-89984T5
$26.99

12280 Water pump kit 65 to 225 hp

12280 Alpha One impeller kit OEM 46-96148T8
$27.95

39530 gasket kit

39530 Alpha One gasket and o ring kit (GLM)

Alpha One Gen 2 water pump kits

89630 Alpha 1 Gen 2 1991 up

89630 Alpha 1 Gen 2 replacement impeller $18.99

12040 Alpha generation 2 water pump parts

12040 Alpha One Generation 2 service kit OEM 47-43026O5 
Includes: guide tube, impeller and gaskets

12043 Water pump impeller kit Alpha one gen 2

P/N 12043 Impeller kit for Mercruiser 1991 and up models.
Impeller $44.99

Includes water pumps coupling assembly P/N 12824 Mercruiser OEM number 816597A1
(1991 and up) S/N OD469859 and up

Parts included:
P/N 89630 / 47-43026T2
P/N 12500 / 817276-1 Wear plate
P/N 30090 / 27-43033-1 Gasket
P/N 82110 / 25-21836 O Ring
P/N 85590 / 26-816575A2 Seal
P/N 31240 / 27-817277 Gasket

12080 Impeller kit Gen 2 1991 up

P/N 12080 Impeller set $66.99
Includes carrier assembly P/N 12341 Mercruiser OEM number 807929A1
Alpha One Generation 2 – Mercruiser (1991 and up) S/N OD469859 and up

Parts included:
P/N 12500 Wear plate / 817276-1
P/N 30090 Gasket / 27-43033-1
P/N 89630 / 47-43026T2
P/N 12341 Carrier assembly / 807929A1
P/N 31240 / 27-817277

817275Q4

P/N 12414 Most popular complete rebuild water pump kit. Replaces Mercruiser OEM number 817275T4. $109.95
Includes upper housing stainless steel water pump housing P/N 12413 Generation 2 – Mercruiser (1991 and up) S/N OD469859 and up.

11071 Key Alpha 1 1991 up

11071 Alpha One Generation 2 replacement key Mercruiser OEM number 28-43037
$4.09 

Engine Cooling

12097 Serpentine brass

Belt driven brass sea water pump assembly

 

P/N 12097
Sea Water Pump Assembly Mercruiser OEM number 46-807151A9
For V6 / V8 Engines with Serpentine Belt
Body: Cast Brass
Impellers: Neoprene
Shaft: Stainless Steel
Bearing: Steel Ball
Bearing Housing: Cast Brass

12093 V belt brass sea water pumps

P/N 12093
Brass sea water pump assembly Mercruiser OEM number 46-807151Al2, 46-72774A32
For V6 / V8 Engines with V-belt
Body: Cast Brass
Impellers: Neoprene
Shaft: Stainless Steel
Ports: 1-1/4 Stainless Steel Bearing: Steel Ball

12115 V belt brass sea water pumps

P/N 12115
Sea Water Pump Assembly for V6 and V8 engines with V-belt
Body: Cast Brass
Impellers: Neoprene
Shaft: Stainless Steel
Ports: 1-1/4 Stainless Steel Bearing: Steel Ball
Bearing Housing: Cast Brass
Stainless Steel Screws
Brass Impeller Housing

12088 Sea water pump service kit

P/N 12088
Sea water pump rebuild kit Mercruiser OEM number 47.807151A14
All Bravo and Mercruiser Alpha One (one piece and two piece) pumps. For GLM one piece brass body pump.

Engine water circulating pumps

15201 Mercruiser V6-V8 water pump Chevy engine

P/N 15201 GM/Chevy V6 / V8 small block water pumps $199.99
*Includes mounting gaskets P/N 31380 / 27-34897
Fits metal and composite timing cover chain
229 3.8 liter, 262 4.3 liter, 305 5.0 liter and 350 5.7 liter

15100 Chevy 4-6 inline water pump

P/N 15100 Chevy inline water pumps 4 / 6 cylinder marine engine circulating pump $199.99
Includes mounting gasket P/N 31350 Mercruiser OEM number 827-33956
153 2.5 liter, 181 3.0 liter and 250 4.0 liter engines

15301 Chevy V8 big block water pump

P/N 15301 Chevy V8 big block water pumps $156.95
Includes mounting gasket P/N 31770 Mercruiser OEM number 27-49110
Works with both tin and aluminum timing cover chain
409 6.6 liter, 427 6.9 liter, 454 7.4 liter and 502 8.2 liter engines

15400 Ford 5.0 or 5.8 liter engine water pump

P/N 15400 Ford V8 small block water pumps $115.95

Includes mounting gasket P/N 31900 Mercruiser OEM number 27-56880
302 CID 5.0 Liter / 351 CID 5.8 Liter

Customers also looked at:

21450

P/N 21450 Lower unit shift cable. Compatible with all models 1972 and up. Note, this cable installs from the AFT end of the bell housing, some minor modifications may be required on older model housings. Replaces Mercury 865436A03 and Sierra kit 18-2603. $89.99

Kit includes:
P/N 21710 Shift Cable 41951A1
P/N 21750 Set Screw 10-45590
P/N 21790 Bellow Clip 54-38863
P/N 21791 Hose Clamp 54-85504320
P/N 39622 Gasket Kit 27-94996A2
P/N 89080 74639 Bellow
P/N 21085 Slide w/ Screw 850752-1
P/N 21140 Shift Arm 45518A2
P/N 21430 Guide 43433
P/N 21432 Anchor 43436
P/N 21433 Set Screw 10-20518
P/N 21462 Wrapping 38473
P/N 21463 Insert 14705

21960

P/N 21960 Sterndrive Generation 2 bellows kit with sealed gimbal bearing,oil seal and bellows gasket. Drive shaft bellows includes internal aluminum sleeve. For 1991 and up models only. Replaces Mercury part number 30-803099T1 $169.99

21950

P/N 21950 Sterndrive exhaust bellows kit Years 1973 thru 1990 with serial numbers 3469428 to 0D469800. OEM part number 30-803097T1 $149.99

Includes:

P/N 21906 Gimbal bearing
P/N 85910 oil seal
P/N 89080 shift cable bellow
P/N 89100 exhaust bellow
P/N 39622 bell housing gasket
P/N 47110/47120 water hoses
P/N 89050 drive shaft bellow

87510

P/N 87510 lower unit seal and gasket kit, replaces Mercury 26-33144A2 for years 1964 to 1990 Serial numbers 1684188 – OD469858. $44.99

Included in kit:

Oil seals
Gaskets
O-rings

Need Tech support

Mercruiser Technical support is available from Wayne our tech service rep in person Toronto, Canada location
Search on Goggle for YouTube videos by Wayne Coll or T.C. Electronics/Marine
there is about 72 Mercruiser boat repair video in total as of 2021 there is no charge to view. Parts we sell ships to United States, United Kingdom, Canada.

Example of Mercruiser sterndrive water pumps listed on YouTube
  • Mercruiser outdrive shift cable and bellows repairs 593,228 views
  • Mercruiser 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
  • Help to identify Mercruiser and Alpha One or Generation 2 outdrive
    and identify your Mercury and Yamaha outboard parts
  • Water pump kit install for Mercruiser 1-R-MR-Alpha one units