OMC Parts / OMC Cobra Stern Drive Tech Drawings

OMC Cobra rebuilt lower unit housing
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Suggested items for OMC Cobra lower unit repair
1978 thru 1986 Tilt motor
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400 800 Stringer seal kits upper gearcase
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800 Repair cost lower gearcase
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400 Series lower gearcase drawing
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engine coupler
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800 series upper gearcase repair cost
Drive shafts 400 800 and stringer
u-joint & water pump shaft
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Complete rebuilt OMC Cobra lower unit housing assembly
  • Rebuilt small gear housing assembly for years 1987 - 1990 (2.3L 4-cylinder Ford) and 1986 - 1989 (3.0L 4-cylinder Chevy)
  • Rebuilt large housing assembly for years 1986 - 1993 (V6 and V8) and 1990 - 1993 (4 cylinder 3.0L)
  • For new upper units, see our Cobra complete lower gear housing page
  • Large prop shaft diameter (1 - 1/4") (Large housing)
  • Engine compatibility and gear ratio chart listed below
  • Large gear housing ratio: 12:22 - Small gear housing ratio 13:26
  • Individual gears and clutch dogs also available
  • New and rebuilt Cobra complete upper gear housing assemblies also available
OMC Cobra complete lower gear housing assembly
cobra lower 28820.jpg
# 28820 Cobra lower unit

#28820 - Large Gear Housing

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

#28910 - Small Gear Housing

Year
2.3L 4-cylinder Ford
1987 - 1990
3.0L 4-cylinder Chevy
1986 - 1989
Print

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

#28820R Complete rebuilt lower large gear housing assembly

$1395.98 *after trade in*

#28910R Complete rebuilt lower small gear housing assembly

$1395.98 *after trade in*

Click here for specifications of heavy duty gears
22666 OMC Gear set all V6-V8 with high alloy steel.jpg
# 22666 OMC heavy duty gear set (included in # 28820 assembly)

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