Mercruiser outdrive parts *SEI lower unit *Alpha 1 repairs

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Mercruiser Alpha One *SEI lower unit outdrive

New aftermarket SEI outdrive replacement lower stern drives for
4 cylinder, V6 and V8 engines

  • Sterndrive engineering aftermarket replacement lower gearcase comes with full 3 year fault-free warranty on SEI replacement sterndrives
  • Replacement sterndrives and parts compatible with years 1970 to present models
  • SEI aftermarket Mercruiser, MR, Alpha one and gen ii lower units and replacement upper units
  • All gear ratios available for all motors, 4 cylinder, V6 and V8 on Mercruiser Alpha one and gen ii lower units
  • No core charge required on new lower/upper gearcases
  • New Johnson/Evinrude replacement outboard lower units

Replacement sterndrives

Description
OEM number

Price
USD

Price
Canadian

S.E.I. 106 aftermarket lower unit

SEI Mercruiser lower unit 1623-8951A43

SE106 water pump housing drive shaft

Water pump housing

SE106 sterndrive
SEI 106 stern drive

P/N SE106
New aftermarket SEI Marine replacement lower unit gear case, replaces Mercruiser lower units up to 1990.

Lower units compatible with 1.94, 1.98, 1.81, 1.65 and 1.50 gear ratios, 4 cylinder, 6 cylinder and V8 motors, up to 300 hp.

SEI lower units have a three year warranty on stern drives.

Note anode is not included with replacement lower unit purchase.
Years 1970 to 1990, Models Mercruiser-1, R MR and Alpha One with serial numbers
2791957 - OD469858

Mercruiser Alpha one replacement lower unit has spline count of 13 on the drive-shaft, the pinion tooth count of 13 and drive or reverse gear of 21 teeth

OEM number 1623-8951A43

$1125.96

$1499.96

SE116 SEI Marine aftermarket outdrive 1623-815822A53

SEI Marine aftermarket outdrive

SE116 prop shaft bearing carrier
Prop shaft bearing carrier

Alpha one Gen ii replacement lower unit.

For 1991 and up replacement lower unit with metal water pump impeller housing, serial numbers OD470000-Up.

Up to 300 horsepower. Will not replace 2.00 or 2.40 ratio units.

$1199.96

$1599.96

Mercruiser / Alpha 1 1970-1990 Upper Gear Cases

Price
USD

Price
Canadian

OEM numbers 1547-9412A20, 1547-9412A21, 1547-9412A22, 1547-9412A23, 1547-9412A19

BP 6 cylinder 165 24-24 gear ratio

6 cylinder 165

P/N SEI 106-1.65

SEI Marine aftermarket Mercruiser replacement upper unit.

Compatible with 1970 - 1977 models, 165 horsepower inline 6 cylinder motors, 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.

Replacement 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

BP 4 cylinder 120 140 Chevy GM 20-24 ratio

4 cylinder 120 140 chevy

P/N SEI 106-1.98
Mercruiser and Alpha One aftermarket replacement upper unit.

SEI marine upper gearcase compatible with years 1970 to 1990 models, 4 cylinder engines with 1.94 / 1.98 gear ratios with a 20-24 tooth count.

Works 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.

Replacement 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

BP SEI marine 470 model V6 185 horsepower 17-19 ratio

SEI marine 470 model V6 185 horsepower 17-19 ratio

P/N SEI 106-1.81
Mercruiser R/MR/Alpha One 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.

Replacement 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

SEI marine 1.50 model V8 sterndrive

P/N SEI-106-1.50
  • Mercruiser and Alpha One Gen 1 replacement upper unit.
  • 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

Mercruiser Alpha One Gen 2 1991-Up Upper Gear Cases

   

Upper Gear Housing

Sterndrive OEM numbers 1547-861063A6, 1547-861063A12, 1547-861063A10 and 1547-861063A8

BP SE116 4 cylinder 3 litre engine 20-24 ratio

4 cylinder 3 litre engine

P/N SE116-194
  • Alpha 1 Gen 2 aftermarket replacement upper unit for years 1991 and 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

SEI Mercruiser Alpha 1 Gen 2 replacement sterndrive

P/N SEI 116-1.47
  • Mercruiser Alpha 1 Gen ii aftermarket replacement upper unit.
  • For years 1991 and 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.
  • Stern drives have 2 year fault free warranty
  • *Note - does not work with the 305 V8 200 horsepower model.

$1399.96 CDN

includes u-joints and output shaft

$1049.96 US

includes u-joints and output shaft

$1265.96 CDN

does not include u-joints and output shaft

BP SE116 V6 Chevy motor 17-19 ratio

BP SE116 V6 Chevy motor 17-19 ratio

P/N SEI 116-1.81
  • Mercruiser Alpha 1 Generation 2 replacement upper unit.
  • For 1991 - up models with 4.3 liter V6 motors, 1.81 gear ratio with a 17-19 tooth count.
  • Works with 4.3L and 4.3LX 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

Sterndrive Installation Hardware Parts
SEI now have Mercury Johnson/Evinrude outboard lower units for sale contact order desk and ask about free shipping in Canada
   
90-116-03K Alpha Gen 2 installation kit

Alpha Gen 2 sterndrive installation parts

P/N 90-106-03K SEI 106 Mercruiser / Alpha One Gen 1 outdrive installation parts

Includes:

  1. bell housing locknuts
  2. washers
  3. mounting gasket
  4. intermediate shift shaft
  5. bolt for anode (anode parts not included)
  6. water pump plastic water passage tube
  7. sterndrive locknuts

$99.96 US

$131.96 CDN

90-106-03K Gen 1 installation kit

Gen 1 installation parts

P/N 90-116-03K SEI 106 Alpha 1 Gen 2 outdrive hardware installation parts

Includes sterndrive parts:
  1. lower unit bolts with locknuts
  2. sterndrive washers
  3. mounting gasket
  4. bell housing locknuts
  5. bolt for anode (anode parts not included)
  6. water pump plastic water passage tube

$80.96 US

$104.96 CDN

WARRANTY. All products 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 SEI product. Proof of purchase must be supplied by customer prior to warranty application and/or receiving warranty benefits.

These one (1) year and three year warranties against manufacturing defects in workmanship and components are the sole and exclusive warranty provided by SEI and all other warranties and potential damages are limited and excluded. These warranties commence on the shipment date of products to the customer sold by Boatparts.ca to the purchaser.

In the event of a warranty claim, all warranty issues must go directly through SEI, Florida. For more information, see SEI marine sterndrive warranty or limited service or warranty information tel (813) 925-7127 warranty@sterndrive.cc

Customers who purchased Johnson/Evinrude parts or lower units
also purchased the following:

Price
USD

Price
Canadian

21960

21960

P/N 21960 Mercruiser lower unit transom service kit, includes accordion style exhaust (1991 and newer, serial numbers 0D470000 - up)

30-803099T1

Parts included:
  • 21906 Gimbal Bearing (new sealed design)
  • 85910 Oil seal
  • 39622 Sterndrive installation gasket Kit
  • 47110 Water Hose 3/4 inch
  • 89180 U-Joint bellow with internal ring
  • 89080 Shift Cable tube
  • 89100 Exhaust tube

$145.95

$192.95

21450 Mercruiser shift cable and parts

21450 Mercruiser Alpha one outdrive shift cable and parts OEM number 865436A03

21450 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

$89.95 USD

$118.95 CDN

87500 Mercruiser upper housing gaskets 26-32511A1

87500 Mercruiser upper housing gaskets and parts

P/N 87500 Seal kit

1964 - 1990 All Mercruiser and MR models
serial numbers
(1684188 - 0D469858)
OEM number 26-32511A1

Parts included:
  • 80420 O-ring OEM number 25-32546
  • 80190 O-ring 25-55801
  • 81180 O-ring 25-25439
  • 82380 O-ring 25-70937
  • 85020 OEM number 26-32511
  • 85060 OEM number 26-96503
  • 85030 OEM number 26-823894
  • 31150 Gasket OEM number 27-55810-1
  • 85150 Grommet OEM number 26-36557

$24.95

$30.00

87501 Alpha One Gen 2 upper 26-88397A1

87501

P/N 87501 GLM Marine aftermarket Alpha One Gen ii
upper gear housing seal / gasket kit

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

26-88397A1

$25.95

$33.95

58232 GLM exhaust manifold kit 1983-2001

58232 GLM exhaust manifold kit 1983-2001

Note talk to order desk about free shipping on manifold set.

P/N 58231 / 58232 Complete Mercruiser GM V8 manifold set with 3 inch or 4 inch riser.
Parts 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

12110 Water pump kit

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 Seal
  • 89840 47-89984T4 Impeller

$44.95

$54.95