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Remanufactured OMC Cobra lower units

Rebuilt lower unit gear case

  • Rebuilt large housing assembly for years 1986 - 1993 (V6 and V8) and 1990 - 1993
  • 4 cylinder 3.0L. small gear housing assembly for years 1987 - 1990 (2.3L 4-cylinder Ford) and 1986 - 1989 (3.0L 4-cylinder Chevy)
  • Rebuilt gear cases include aftermarket or original OEM - gear sets. Large gear housing ratio: 14:26 (OEM gears) - Small gear housing ratio 13:26
  • New 1 - 3/16" prop shaft and gear set installed in every unit
  • For rebuilt upper units, see our Cobra rebuilt upper gear case page
  • Individual gears also available
  • 90 day warranty from time of install

To order a new or rebuilt gear case contact us at: (416) 751-7326 New installed parts included in rebuild list below

#28820 - Large Gear Housing

Year

3.0 Liter 4 cylinder Chevy
1990 - 1993
4.3 Liter V6
1986 - 1993
5.0 Liter Chevy/Ford
1986 - 1993
5.7 Liter Chevy
1986 - 1993
5.8 Liter Chevy
1989 - 1993

Part Description

Part #

Estimated
Retail
Price

Pinion bearing

21610

$32

Detent

27720

$55

Screws

22375, 22366, 22373

$15

Gaskets

33960, 33970, 31171

$15

Seal

86620

$5

Guide

12961

$5

Nuts

21180

$5

Washers

21490

$5

Bearing housing

27770

$78

Shims

23590

$5

Thrust washer

21645

$7

Thrust bearing

16330

$26

Pinion and forward gear (original OMC set)

22623

$489

Anodes (3 units)

12774, 12776, 12737

$38

Plug

21731

$6

Forward gear bearing

22910

$54

Spring

11052

$5

Prop shaft (1-3/16" dia.)

22414

$306

Reverse gear bearing

22870

$16

Bearing

11410

$10

Oil seal

85130

$10

28820R OMC stern drive rebuilt lower gear case
28820R OMC stern drive rebuilt lower gear case

#28910 - Small Gear Housing

Year

2.3 Liter 4-cylinder Ford

1987 - 1990

3.0 Liter 4 Cylinder Chevy

1986 - 1989

Core charge deposit of $360 is refunded after we receive your core trade in.

P/N 28820R
Remanufactured Cobra stern drive lower gear case with origina gears $1595.29 *after trade in*

P/N #28910R
Rebuilt small housing Cobra lower gear case $1395.09 *after trade in*