OMC Parts Drawing *Cobra *Mercruiser *Alpha SEI Outdrives

OMC Cobra *New upper gearcases V4 V6 V8

Replacement New Aftermarket GLM Marine OMC Cobra Upper Gearcase assembly V4 V6 V8 Chevy GM

Last updated on 10/27/2023

  • Replaces OMC #986381, 988844, 986382, 983826
  • New GLM Marine aftermarket upper gearcase assembly with u-joint and drive shaft installed
  • 1 year warranty
  • Gear ratios 21/17, 21/19, 21/16, 21/18: Call/email for current availability
  • 100% brand new case and parts from manufacturer warehouse
  • Comes with outdrive installation gasket kit
  • Compatible with 3.0L Chevy (1990 – 1993), 4.3L 262, 5.0L 305, 5.7L 350 Chevy, 5.0L 302, 5.8L 351 Ford (1986 – 1993)
  • Rebuilt unit with new parts also available

New and rebuilt prices below

*New OMC Cobra upper gearcase sterndrives

29930 OMC Cobra upper gearcase 986381
29940 Cobra sterndrive V6 chevy complete 986380
28315 Drive shaft output engine yoke V4 V6 V8 814819A3
29910 OMC outdrive V8 Chevy Ford 986844
29910 OMC outdrive V8 Chevy Ford 986844
29920 Upper gearcase u-joint drive shaft yoke assembly 986382

*New – with drive shaft

21/17 Gear ratio, for 5.0L 305 Chevy, 5.8L EFI 302 Ford, 7.5L 460 Ford King Cobra (1987-1989) 

$1999.89 US

*Call / email for all other gear ratio availability

*New – with drive shaft

21/17 Gear ratio, for 5.0L 305 Chevy, 5.8L EFI 302 Ford, 7.5L 460 Ford King Cobra (1987-1989) 

$2699.89 CDN

*Call / email for all other gear ratio availability

*Rebuilt* Upper Gearcase Pricing
Below

All rebuilt units come installed with brand new internal parts – gears, bearings, seals, water pump, impeller shaft, bearing housing. External housing is reconditioned. Rebuilt units do not include u-joints or output drive shaft.

$1599.89 US or $2159.89 CDN

*Rebuilt – does NOT include drive shaft and u-joints

21/17 Gear ratio, for 5.0L 305 Chevy, 5.8L EFI 302 Ford, 7.5L 460 Ford King Cobra (1987-1989) 

$1999.89 US

*Rebuilt – does NOT include drive shaft and u-joints

21/17 Gear ratio, for 5.0L 305 Chevy, 5.8L EFI 302 Ford, 7.5L 460 Ford King Cobra (1987-1989) 

$1999.89 US

*Rebuilt – does NOT include drive shaft and u-joints

21/17 Gear ratio, for 5.0L 305 Chevy, 5.8L EFI 302 Ford, 7.5L 460 Ford King Cobra (1987-1989) 

$1999.89 US

*Rebuilt – does NOT include drive shaft and u-joints

21/17 Gear ratio, for 5.0L 305 Chevy, 5.8L EFI 302 Ford, 7.5L 460 Ford King Cobra (1987-1989) 

$1999.89 US

*Rebuilt – does NOT include drive shaft and u-joints

21/17 Gear ratio, for 5.0L 305 Chevy, 5.8L EFI 302 Ford, 7.5L 460 Ford King Cobra (1987-1989) 

$1999.89 US

*Rebuilt – does NOT include drive shaft and u-joints

21/17 Gear ratio, for 5.0L 305 Chevy, 5.8L EFI 302 Ford, 7.5L 460 Ford King Cobra (1987-1989) 

$1999.89 US

(Includes all labor and seals) 

*Note – Additional parts may be required on top of basic repair.
Please see parts breakdown page for additional part pricing. 

Click here for instructions on sending your gearcase to us

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$24.95 US

$32.95 CDN

OMC Cobra Water Pump Service Kit, Water Pump OMC Cobra Impeller

12092 Cobra water pump kit

$50.95 USD

$64.95 CDN

12962 Transom bellows kit for Cobra sterndrive

12962 Transom bellows

P/N 21962
Transom bellows kit

$149.95 US

P/N 21962
$194.95 CDN

90095 Bearing carrier puller tool

90095 Bearing Carrier Puller

# 90095 $90.95 us

# 90095 
$118.95 cdn

87654 Upper gearcase seal kit 4 cylinder-V6-V8 1986-1993

P/N 87654O
OMC Cobra Seal Kit

$41.95 US

P/N 87654 
$54.95 CDN

Cobra sterndrive

90295 Removal and installation tool

# 90295 $86.95 us

# 90295 
$112.95 us

OMC outdrive lower unit pump

# 401 $9.95 us

# 401 
$12.95 cdn

89950 OMC Cobra impeller

P/N 89950
Water pump impeller

$14.95 US

P/N 89950
$18.95 CDN