OMC Parts Drawing *Cobra *Mercruiser *Alpha SEI Outdrives

boatparts.ca logo
  • MerCruiser Alpha One water pump 1967 to 1990 lower unit

MC-1 / R / MR / Alpha One year's 1966 to 1990 with serial numbers 2495186 - OD469858. Four cylinder, V6 / V8 GM Chevy outdrives.

Last updated 11/15/2023

  • GLM Marine aftermarket water pumps include the following:
    seal, gaskets, O-rings and impeller.
  • When installing, make sure to use gasket sealing compound on O-rings and gaskets (shown below).
  • Years 1967 to 1990 MerCruiser models (up to Alpha One gen 1)
  • GLM Marine recirculating engine water pumps.

Photo

Description / OEM #

Price
(USD)

Price (Canadian)

12110 Water pump kit years 1970 to 1982

12110 Water pump kit

P/N 12110
lower unit water pump kit
1970 – 1983, serial numbers 2763442-6854392

Parts included:
12312 46-57234T1 Base
12410 46-96148T1 Housing
12510 32435-1 Wear Plate
12820 23-29804T Guide Tube
21330 25-30271 Slinger
31010 27-85608-1 Gasket
31020 27-858524 Gasket
31040 27-856704 Gasket
31170 (2) 12-19183-3 Gasket
81160 25-30613 O-ring
85140 26-45577-1 Oil seal
89840 47-89984T4 Impeller

$44.95

$ 66.89

88010 Service kit has upper-lower seal kit and water pump repair parts

88010 Service kit has upper-lower seal kit and water pump repair parts

P/N 88010 Water pump kit complete rebuild, includes upper and lower unit seals and gaskets.

Years 1970 to 1983 with serial numbers 2763442 thru to 6854392

$146.89

$ 223.89

Mercruiser outdrive components for years 1984 to 1990

12120 Alpha 1

P/N 12120 Impeller kit for Mercruiser outdrives with housing (1984 – 1990 serial numbers 6854393-OD469858)
Parts included:
12321 46-57234A1 Base
12410 46-96148T1 Housing
12510 32435-1 Wear Plate
12820 23-29804T Guide Tube
21330 25-30271 Slinger
31010 27-85608-1 Gasket
31020 27-858524 Gasket
31040 27-856704 Gasket
31170 (2) 12-19183-3 Gasket
81160 25-30613 O-ring
85140 26-45577-1 Seal
89840 47-89984T4 Impeller

$37.95

$ 63.89

88020 Mercruiser upper-lower seal kit with water pump set to repair outdrive. Years 1984 to 1990 serial numbers 6854393 thru to OD469858.

88020 Upper-lower seal kit with water pump set to repair outdrive.

P/N 88020

Outdrive service, includes impeller and upper housing and lower gearcase seal kit.

Years 1984 to 1990 serial numbers 6854393 thru to OD469858.

$167.89

$ 223.89

12130 Mercruiser water pump (MR-1) parts for years 1966 to 1969. (MR-1) Outdrives with serial numbers 2495186 to 2763441.

12130 Water pump kit for MC-1 outdrive.

P/N 12130 Parts for years 1966 to 1969 with serial numbers 2495186 to 2763441.

$64.89

$ 123.89

12280 Complete kit 65-225 hp. OEM 46-96148A8.
P/N 12280 Pump housing impeller service kit with the water pump housing. OEM 46-961-48T8 and 46-78400A2. Years 1966 to 1990. Serial numbers 2495186 to OD469858.
Parts included:
12410 water pump housing
12510 32435-1 Wear Plate
12820 23-29804T Guide Tube
12830 26-38970 Grommet
21330 25-30271 Slinger
31010, 31020, 31030, 31040 Gaskets
31170 (2) 12-19183-3 Gasket
81390, 81160, 82260, 82250 O-ring
85140 26-45577-1 Seal
89840 47-89984T4 Impeller
P/N 12280
 4 and 6 cylinder OEM 46-78400A2
650 65 HP 4 Cylinder 1963-1969 serial number 1542745-2803561
650 65 HP 4 Cylinder 1970-1972, serial number 2803562 to 2874263, 2997439 to 3293183
700 E/EL-2 70 HP 6-cylinder 1961, serial number 1503959-1566239
75 HP 4 cylinder 1984-1988 USA 6432901 – Up
75 HP 4-cylinder 1984-1988 CAN 7208573 – Up
800 80 HP 4 cylinder 1969-1972, serial number 2559001-3493912
80 HP 4 cylinder 1978-1983, USA
831999-6432900
80 HP 4 cylinder 1978-1983, CAN 7110998-7208572
850 SX 85 HP 4 Cylinder 1973-1977
90 HP 4 Cylinder 1978-1986 USA 4845301 up
90 HP 6 Cylinder 1978-1986 CAN 7111698 up
1000 SS (E) 100 HP 6 Cylinder years 1962-1965, 1968 and 1969
Various 105 to V200 hp. models
Please call with year and serial number.

$29.95

$ 59.89

12290 Mercruiser impeller service kit, without housing. Years 1966 thru 1990 with serial numbers from 2495186 to OD469858.

12290 MerCruiser-seal kit without housing.

P/N 12290 Impeller service, without housing. (1966 – 1990, serial numbers 2495186-OD469858)

Parts included:
12510 32435-1 Wear Plate
12820 23-29804T Guide Tube
12830 26-38970 Grommet
21330 25-30271 Slinger
31010, 31020, 31030, 31040 Gaskets
31170 (2) 12-19183-3 Gasket
81390, 81160, 82260, 82250 O-ring
85140 26-45577-1 Seal
89840 47-89984T4 Impeller

$26.89

$ 35.89

39530 Gaskets and seals only kit.

39530 Gaskets and seals only kit.

P/N 39530

MerCruiser water pump housing gasket and seal, without housing. Years 1966 to 1990 with serial numbers 2495186 to OD469858.

$21.95

$ 21.89

MC-1/R/MR/Alpha One water pump impeller and parts

Photo

Description / OEM #

Price
(USD)

Price (Canadian)

Mercruiser Alpha One lower unit parts

P/N 89840 Impeller

P/N 89840

Impeller OEM 47-89984T4 for MC-1 / R / MR and Alpha One

Years 1966 to 1990 with serial numbers 2495186 – OD469858

$24.89

$ 24.89

11070 water pump impeller key.

P/N 11070 Impeller key

P/N 11070

Impeller key for MC-1 / R / MR / Alpha One.

Years 1966 to 1990 with serial numbers 2495186 to OD469858

$4.89

$4.89

Mercruiser Alpha One lower unit parts

12410 Pump housing

P/N 12410 Pump housing 46-96148T1

$54.89

$54.89

Mercruiser Alpha One lower unit parts

12310 Pump base

P/N 12310 Pump base 46-57234A1

$44.89

$44.89

12510 Wear plate for water pump

12510 Wear plate

P/N 12510 Wear plate 32435-1

$ 6.89

$ 6.89

Mercruiser Alpha 1 Gen 2 lower unit parts

81390 O ring

P/N 81390 O ring (5 units)

$4.89

$4.89

Mercruiser Alpha One lower unit parts

82260 O ring

82260 O ring 25-33145

$4.95

$4.89

82115 O ring 25-21836

82115 O-ring

P/N 82115 O-ring

 

25-21836

$4.89

$4.89

82150 O-ring

P/N 82150 O-ring

25-35027

$4.95

$4.89

82210 O rings 5 pack

82210 O-ring

P/N 82210 O-ring (5 units)

25-21836

$4.95

$4.89

Install instructions for V4, V6 and V8 engine complete water pump kit

Install instructions for V4, V6 and V8 engine complete water pump kit

  1. Slide water tube grommet into water pump housing, then install guide tube with grommet onto water pump housing.
  2. Install gasket compound on small 0-ring into water pump housing and install impeller cup.
  3. Glue seal into groove on water pump housing, set aside.
  4. Clean gasket surface on gearcase. Install gasket and impeller plate onto gearcase.
  5. Install key and 0-ring onto driveshaft. Slide impeller down driveshaft with 0-ring groove facing down, until it seats.
  6. Lightly lubricate impeller housing with soapy water. Do not install impeller dry use a wheel bearing grease.
  7. Slide impeller housing over impeller.
  8. While turning driveshaft in a clockwise direction push down on impeller housing.
  9. Tighten bolts, grease driveshaft splines.

People who purchased the above also purchased the following:

Photo

Description / OEM #

Price
(USD)

Price (Canadian)

Johnson gasket compound 508235

P/N 508235 Gasket sealing compound – 4 FL. OZ (118 ml). This sealant is used on the o-rings and gaskets when re-sealing the outdrive.

$22.95

$27.89

GLM Marine recirculating Mercruiser engine water pumps

  • Stainless Steel Backing Plate
  • Stainless banded ceramic seal seat
  • Bi-Directional and Balanced
  • Stainless steel seal cup and spring
  • Machined Brass Impeller
  • Epoxy Painted Pump Housing
15100 Chevy engine water pump

15100 Chevy 4-6 inline water pump

P/N 15100
Chevrolet inline 4 cylinder water pump
OEM: 884727, 3854017

153 CID – 2.5 Liter
181 CID – 3.0 Liter

$96.95

$127.89

15201 Engine water pump, V6 Mercruiser manifold & riser 4"

15201 Chevy V6-V8 Engine water pump

P/N 15201
Inline 6 Cylinder engines small block engine water pumps
OEM: 884727, 3854017

229 CID – 3.8 Liter
262 CID – 4.3 Liter
250 CID – 4.0 Liter
305 CID – 5.0 Liter
350 CID – 5.7 Liter

$127.89

$127.89