OMC 800/Cobra parts *Outdrive drawings *How to videos

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OMC Cobra Lower Repair Techniques

Do you need tech help with your OMC Cobra repair for your lower unit ?

You may find it here !

  • Broken OMC Cobra lower gear case drive shaft
  • Broken Pinion gear with nut
  • Snapped drive shafts
  • Drive gears
  • Pinion nut stripped
  • Forward bearing housing damage

Exploded View Drawings
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Lower gear case Cobra outdrive
Lower gear case Cobra outdrive

Propeller shaft with greater than .002 run out will soon be broken seal with oil leaking out at high rpm levels.
Prop shaft run out should be checked before shaft is removed from unit.

Drive-shaft bearing play from side to side can be measured at this time.

Pinion gears with broken shafts or pinion nuts are best removed by drilling one 13/64 inch hole to aid in removing dowel pin from the clutch dog.

If you can remove the spring, and push out the dowel pin the drive shaft will pull out easy. 

OMC Cobra repairs prop shaft dial indicator
OMC Cobra repairs prop shaft dial indicator

After hole is drilled a long 3/16 punch will move the 1/4 inch dowel pin to the side and allow the drive shaft to come out.

Hole can be filled by tapping hole with a 1/4 - 20 NC. thread.

Fill with stainless steel set screw and then using 680 green Loctite to hold unit in place.