Mercruiser outdrive parts *SEI lower unit *Alpha 1 repairs

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Mercruiser outdrive replacement *Upper gearcase *Lower unit

Alpha One replacement upper gearcase *New SEI Marine outdrive
unit for 4 Cylinder, V6 and V8 engine

  • SEI sterndrive aftermarket replacement lower unit and upper gear case outdrives
  • Parts SE106 for 1970-1990 models, and P/N SE116 for 1991 and up (Alpha One Gen 2 models)
  • Compatible with 1970 - present models
  • Mercruiser, MR, Alpha One and Generation 2 models
  • All sterndrive gear ratios available for all motors, 4 cylinder, V6 and V8
  • No core charge required on all outdrives

Sterndrive Lower Units

Price
USD

Price
Canadian

SEI lower unit

SEI lower unit

SEI Marine aftermarket outdrive

Marine aftermarket

impeller housing

P/N SE106 Mercruiser R /MR / Alpha one complete replaced assembly lower units. For 1970 - 1990 models, serial numbers 2791957-OD469858. 13 spline vertical driveshaft. Replaced 4 cylinder, 6 cylinder and V8 models up to 300 horsepower.

1623-8951A43

*Note - does not include trim tab anode

$1125.96

$1499.96 CDN

lower unit 1623-815822A53

sterndrive gearcase V8 V6 4 cylinder

Sterndrive gearcase V8 V6 4 cylinder

water pump housing
prop shaft bearing carrier

P/N SE116 Alpha One Generation 2 lower unit assembly. For 1991 and up models 4 cylinder, V6 and V8 models with metal water pump impeller housing, serial numbers OD470000-Up. For up to 300 horsepower. Will not replace 2.00 or 2.40 ratio units.

*Note - does not include trim tab anode

$1199.96

$1599.96 CDN

12670 trim tab anode aluminum 31640Q4

12670 anode aluminum

P/N 12670 Trim tab outdrive anode, for SE106, 1970-1990 model 31640Q4

$10.96 US

$13.96 CDN

12710 trim tab anode 76214Q5

12710 trim tab anode

P/N 12710 Trim tab, for SE116, 1991 and up models 76214Q5

$9.96 US

$13.96 CDN

1991 and up Alpha 1 Gen 2
Upper Gearcases

Price
(USD)

Price
(Canadian)

116 top cap

P/N SE116-147 Mercruiser Generation 2 aftermarket upper unit. For 1991 - up models with 230 / 260 horsepower V8 motors, 1.47 gear ratio with a 20-22 tooth count.

Compatible with 5.0 liter 305 and 5.7 liter 350 models serial numbers 0D470000 and up.

*Note - does not work with the 305 V8 200 horsepower model.

$1049.96 US

includes u-joints and output shaft

$1399.96 CDN

includes u-joints and output shaft

$1265.96 CDN

does not include u-joints and output shaft

Alpha 1 Gen 2 upper gearcase 194 4 cylinder 3 liter

upper gearcase 3 liter

bottom view

P/N SE116-194 Alpha One Generation 2 aftermarket upper unit. For 1991 - up models with 4 cylinder motors, 1.94 gear ratio with a 20-24 tooth count.

Compatible with 3.0L and 3.0LX models serial numbers 0D470000 and up.

$1049.96 US

includes u-joints and output shaft

$1399.96 CDN

includes u-joints and output shaft

$1265.96 CDN

does not include u-joints and output shaft

Mercruiser Generation 2 outdrive V6 Chevy GM 181

V6 Chevy GM 181

P/N SE116-181 Generation 2 assembly upper unit. For 1991 - up models with 4.3 liter V6 motors, 1.81 gear ratio with a 17-19 tooth count.

Works for Mercury engines with a 4.3L and 4.3LX engine in boat with models serial numbers 0D470000 and up.

$1049.96 US

includes u-joints and output shaft

$1399.96 CDN

includes u-joints and output shaft

$1265.96 CDN

does not include u-joints and output shaft

Mercruiser / Alpha 1 1970-1990 Upper Gearcases

Price
(USD)

Price
(Canadian)

Mercruiser upper gear case

sterndrive top view
drive shaft housing yoke u-joints

P/N SE106-198 Mercruiser R/MR/Gen 1 upper unit sterndrive assembly. For 1970 - 1990 models, 4 cylinder with 1.94 / 1.98 gear ratios with a 20-24 tooth count.

Compatible with 120 to 140 horsepower models with a 2.5 or 3.0 liter motor, 1971 to 1990, serial numbers 2791957 to 6225576.

*Note - before ordering, please measure your output shaft that goes into the engine. Outdrives with upper units come with an output shaft that measures 9-9/16 inch. If you have a sterndrive input shaft is the 'short style' which measures 8-1/8 inches, please contact us for sterndrive availability.

$1049.96 US

includes u-joints and output shaft

$1399.96 CDN

includes u-joints and output shaft

$1265.96 CDN

does not include u-joints and output shaft

SEI Alpha 1 Gen 1 gearcase upper unit 470 485 Chevy engine

Gen 1 upper 470 485 Chevy engine

bottom view

P/N SE106-181 Mercruiser R/MR/Alpha One Generation 1 complete upper unit. For 1976 - 1982 models with 4 cylinder 470 / 485 models and 1986 - 1990 4.3 liter V6. 1.81 / 1.84 gear ratio with a 17-19 tooth count. Compatible with inline 4 cylinder 3.7 liter motors serial numbers 4208730 to 6225576, and 4.3 liter 185 / 190 horsepower V6 motors serial numbers 6225577 to 0D469858.

*Note - before ordering, please measure your output shaft that goes into the engine. New upper units come with an output shaft that measures 9-9/16 inch. If your shaft is the 'short style' which measures 8-1/8 inches, please contact us for availability.

$1049.96 US

includes u-joints and output shaft

$1399.96 CDN

includes u-joints and output shaft

$1265.96 CDN

does not include u-joints and output shaft

Mercury 165 horsepower inline 6 cylinder motor 24-24 gear ratio

Mercury 165 horsepower

P/N SE106-165 Mercruiser upper unit. For 1970 - 1977 models with 165 horsepower inline 6 cylinder, 1.65 / 1.62 gear ratio with a 24-24 tooth count.

 Compatible with 165 models serial numbers 2763442 and up.

*Note - before ordering, please measure your output shaft that goes into the engine. Outdrives with upper units come with an output shaft that measures 9-9/16 inch. If your shaft is the 'short style' which measures 8-1/8 inches, please contact us for availability.

$1049.96 US

includes u-joints and output shaft

$1399.96 CDN

includes u-joints and output shaft

$1265.96 CDN

does not include u-joints and output shaft

Upper unit Chevy GM engine 350 305 V8

Chevy GM 350 305 V8

P/N SE106-150 Mercruiser and Gen 1 upper unit assembly. For 1974 - 1990 models with 205 / 230 / 260 horsepower V8 motors, 1.47 and 1.50 gear ratio with a 20-22 tooth count.

Compatible with 888, 898, 228, 225-S, 233, 250, 260, 5.0 liter 305 and 5.7 liter 350 models serial numbers 2763442 and up.

$1049.96 US

includes u-joints and output shaft

$1399.96 CDN

includes u-joints and output shaft

$1265.96 CDN

does not include u-joints and output shaft

Sterndrive Installation Hardware Kits

Price
(USD)

Price
(Canadian)

90-106-03K Gen 1 installation kit

90-106-03K Gen 1 installation kit

106 intermediate shift shaft

Intermediate shift shaft

bell housing locknuts

P/N 90-106-03K Mercruiser Mercury marine / Alpha One Gen 1 sterndrive installation parts and accessories kit.

Includes accessories and parts:

bell housing locknuts,
washers,
mounting gasket,
intermediate shift shaft,
bolt for anode (anode not included),
water pump plastic water passage tube,
sterndrive locknuts

$99.96 US

$131.96 CDN

90-116-03K Gen 2 installation kit

90-116-03K Gen 2 installation kit

installation bolts

Installation bolts

P/N 90-116-03K Gen 2 sterndrive hardware installation parts and accessories kit.

Includes accessories:

lower unit bolts with locknuts,
washers,
mounting gasket,
bell housing locknuts,
bolt for anode (anode not included),
water pump plastic water passage tube

$80.96 US

$104.96 CDN

WARRANTY. All marine assembly outdrives manufactured by (“SEI”) are covered by warranty for either a period of one (1) year for upper gear cases purchased without u-joints and output shafts, or two (2) years for lower units and upper gear cases purchased with u-joints and output shafts from the date of actual purchase.

A condition of qualification of these warranties is proof of purchase of the sterndrive engineering product. Proof of purchase must be supplied by customer prior to warranty application and/or receiving warranty benefits.


These one (1) year and two (2) year warranties against manufacturing defects in workmanship and parts are the sole and exclusive warranty provided by sterndrive engineering and all other warranties and potential damages are limited and excluded. These warranties commence on the shipment date of outdrives and parts to the customer sold by Boatparts.ca to the purchaser.

In the event of a warranty claim, all warranty issues must go directly through Sterndrive engineering, Florida. For more information, see SEI marine limited sterndrive warranty
or service information.

Customers also purchased:

Price
USD

Price
Canadian

12110 Water pump kit

12110 Water pump kit

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

Repair 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 Seal
89840 47-89984T4 Impeller

Bravo and Evinrude repair components also available

$44.95

$54.95

21950 Bellows kit

Bellows Kit

P/N 21950 Mercruiser lower unit transom service kit, includes accordion style exhaust (1973 - 1990, serial numbers 3469428 - 0D469858)

30-803097T1

Parts included:
21905 Gimbal Bearing
85910 Oil seal
39622 sterndrive installation gasket Kit
47110 Water Hose 3/4 inch
47120 Hose 5/8 inch
89050 U-Joint tube
89080 Shift Cable tube
89100 Exhaust tube

$145.95

$192.95

87500 Mercruiser upper housing gaskets 26-32511A1

87500 Upper housing gaskets

P/N 87500 Seal kit

1964 - 1990 models

serial numbers
(1684188 - 0D469858)

26-32511A1

Mercury marine, Evinrude, Yamaha and Bravo seal kits also available.

$24.95

$30.00

87501 Alpha One Gen 2 upper 26-88397A1

87501

P/N 87501 Alpha 1 Generation 2

upper gear housing seal / gasket kit

(1991 and up,
S/N 0A54004 - up)

26-88397A1

Evinrude and Bravo repair seal kits also available

$25.95

$33.95

58232 GLM exhaust manifold kit 1983-2001

58232 GLM exhaust manifold kit 1983-2001

P/N 58231 / 58232 Complete Mercruiser GM V8 manifold set with 3 inch or 4 inch riser.
Included
P/N 51230 Cast iron manifold assembly
860246Q11 x 2

P/N 51110 / 98504A3 or 51140

807988A2 Elbow - riser (3 inch or 4 inch) x 2

P/N 31100 Gasket 27-33395 x 2

P/N 30240 Gasket 27-863724 x 2

P/N 13991 90 degree hose fitting 22-806926 x 2

P/N 13992 Drain plug 22-806608A02 x 2

P/N 80140 O-ring for plug 25-45253 x 2

P/N 22391 Stud 16-49545 x 8

P/N 21248 Locknut 11-46335 x 8

$599 US

$791 CDN

51110 Elbow cast iron 3 inch

51110 Elbow cast iron 3 inch

   

P/N 51110 Elbow with mounting gasket - 3 inch 15 degree at hose connection / 98504A3

Model, CID, Year and Serial number for small block GM engines

185 229 V6 1985-1986 6330183-6919655 (4bbl)

185 262 V6 1985-1986 0A331455-0B527954 (2bbl)

205 262 V6 1985-1986 S/N 0A331455-0B527954

200 305 V8 1985-1987 S/N 6899058-0B525981

228 305 V8 1983-1995 S/N 6218462-0F600999

230 305 V8 1985-1987 S/N 6899269-0B525981

898 305 V8 1983-1984 S/N 6218462-68990571

260 350 V8 1983-1987 S/N 6218462-0B773304

260 350 V8 1981-1987 S/N 5907058-0F024999

$147 US

$194 CDN

M-21450-Mercruiser-outdrive-shift-cable-and-parts-865436A03.jpg

21450 Mercruiser Part 865436A03

21450 Repair parts that are included:

21080 Mercruiser slide
21090 Set screw
21140 Shift cable arm
21430 Guide
21433 Set screw
21462 Shift wire wrapping
21463 Insert
21464 Wire
21432 Anchor
21710 Cable
89080 Bellow
21750 Set Screw
21790 Bellow clip
21791 Hose clamp
39622 Gasket kit
Bravo One sterndrive cable also available, GLM P/N 2171

$89.95 USD

$118.95 Canadian

Technical Support for your boat by video

Technical and repair support available from Wayne at our Toronto, Canada location
Search on Google for Mercury marine sterndrive, Bravo, Evinrude repair YouTube videos by Wayne Coll or T.C.Electronics/Marine
we have about 72 boat repair videos in total as of 2021 there is no charge to view

Sample of 3 Mercruiser sterndrive videos

Sterndrive Bellow & Shift Cable Repairs 593,226 views
Water pump removal and repair parts video 320,210 views
How I remove my gen 2 lower unit 76,349 views

Evinrude, Yamaha, Bravo, Mercury marine parts also available