OMC Parts / OMC Cobra Stern Drive Tech Drawings

OMC electric shift lower gear case

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Rebuilt OMC electric shift sterndrive lower gear case
  • OMC stern drive rebuilt electric shift lower gear case for years 1970 thru 1977 (all engines)
  • Rebuilt gear case comes with 1 year warranty
  • 10 bolt or 8 bolt swivel housing available for OMC electric 
  • For rebuilt upper gear cases, see our OMC stern drive 800 / 400 upper gear case page
  • OMC electric shift wire available
To order a new or rebuilt gear case contact our 24 hour gear case order line: (647) 710-3787

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OMC electric shift

1970 - 1977 Rebuilt electric shift lower gear case (shift wire available if needed)

$1149.09 *after trade in* ($260 core deposit required)

 

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Lower unit electric shift

Lower gear case repair for 10 and 8 bolt swivel housing models includes:

  • Replacing or repairing forward or reverse spring, new drive shaft bearing, new seals, pressure testing. Swivel housing is sand blasted and painted
  • Lower vertical seals ( 2 ) offset to land on a different position on shaft in case of drive shaft wear
  • Prop shaft bearing retainer machined to hold ( 3 ) seals that will locate in different position on prop shaft
  • Bearing retainer is then sand blasted and painted.
  • *Additional parts and costs may be required for repair
  • Note: broken clutch spring breaking on the gear face included with basic repair ( 90% )
  • If hower the clutch spring can not be repaired ( 10 % ) a used spring will be installed  adding $85.00 to the cost of the basic repair.

Basic repair cost - $695.89

 

Zinc chromate and primer with a white epoxy paint for lower unit (if requested) - $129.89

 

The following may be required if your OMC electric lower unit has run with no or very little oil in lower gearcase :

  • Drill and inch hole in outdrive for brass punch
  • Shaft is removed the hole is then taped 3/4 N.F. thread
  • Alumium plug is machined and inserted

$109.89

 

The following may be required if your OMC electric lower unit has run in salt water for periods of time :

  • Drill old hole 17/64 " in aluminum 3/4" deep
  • Tap hole with #5401-4 helicoil 1/4 -20" thread
  • Place loctite retaining compound #680 or #609 on helicoil to hold tread in place
  • Insert stainless steel coil and break off instalation tab on bottem

$19.89 per required bolt

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OMC exhaust housing

1970 - 1977 Exhaust housing $139.09

 

For more information on OMC, please see OMC electric shift stern drive history page