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OMC Parts Drawing *Cobra *Mercruiser *Alpha SEI Outdrives

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  • OMC Cobra upper outdrive parts drawing # 33 to 52
  • GLM Marine aftermarket OMC parts drawing Cobra Shims and bearing carrier components

Updated April 12th 2026

  • Parts drawing numbers 33 to 52
  • Cover assembly
  • Water pump adaptor
  • Plastic u-joint carrier shims
  • Rear metal shims
  • Vertical housing metal shims
OMC Cobra upper gearcase parts

OMC Cobra upper gearcase parts layout

OMC Cobra upper gearcase parts, 87654 OMC Cobra upper gearcase

87654 OMC Cobra upper gearcase seal kit

87654

Upper gear case seal kit

Replaces 987603

P/N 87654
$74.99 US

P/N 87654
$102.99 CDN 

OMC Cobra upper gearcase parts

39630 Transom gasket 508105

39630

Outdrive installation gasket kit

OEM 508105

# 39630
$9.95 US

# 39630
$13.99 CDN

21111 Cover nut

21111 Cover Nut

21111

Cover nut

85.95 us

$27.89 cdn

27800 Top bearing carrier

27800 Bearing Carrier pinion gear

34
27800

Bearing carrier

85.95 us

$103.89 cdn

27900 Cobra water pump adaptor

27900 Water pump adapter

35
27900

 Water pump adapter

82.95 us

$128.89 cdn

OMC Cobra upper gearcase parts

27920 bearing carrier u joint

36
27920

bearing carrier u joint

$97.95 us

$150.89  cdn

o-ring

82480 O-ring in seal kit

37
82480

O-ring in seal kit

28404 Top cover assembly OEM number 914489.

28404 cobra cover / o ring

38
28404

Top cover assembly

OEM number 914489.

$81.95 us

$125.89 cdn

28406 Used cover for-water pump upper unit 983967

28406 Cobra parts top

39
28406

Used cover for-water pump upper unit 983967

$64.95 us

$83.89 cdn

12661 Upper gearcase thrust plate port OEM number 3852561.

12661 Thrust plate port

40
12661

Thrust plate port

$ 4.95 us

$7.89 cdn

Upper gearcase thrust plate stbd 3852562.

12662 Thrust plate starboard side

41
12662

Thrust plate starboard side

$ 4.95 us

$4.89  cdn

23360 Thrust plate shim

23360 OMC Cobra shim

42
23360

Shim

$ 6.95 us

 

$11.89 cdn

OMC Cobra upper gearcase parts

28408 cover assembly

43
28408

Cover assembly

$ 38.95 us

$59.89 cdn

21773 Retainer ring

21773 retainer ring

44
21773

Retainer ring

$ 5.95 us

$4.89 cdn

23361 OMC Cobra shim .003

23361 Cobra shim .003

45
23361

Shim 0.003″

$ . us

$7.89 cdn

23362 Cobra Shim .004

23362 Shim .004

45
23362

Shim 0.004″

$  us 

$7.89 cdn

23363 OMC Cobra shim .005

23363 Shim .005

45
23363

Cobra shim .005

$ us

$7.89 cdn

23364 OMC Cobra shim .010

23364 Shim .010

45
23364

Cobra shim .010

$ 

$ 7.89

OMC Cobra upper gearcase parts

22384 Screw

46
22384

Screw

$ 4.99 us

$7.89 cdn

47010 Cobra water pump case vent tube

47010 Cobra vent tube

47
47010

Vent hose

$ 13.95 us

$21.89 cdn

22385 Water pump case screw 3 inch x 5/16

22385 Screw

48
22385

Screw

$ 13.99 us

$23.89 cdn

22386 Screw

49
22386

Screw

$ 4.99 us

$ 5.89 cdn

21732 Top cover for upper gearcase dipstick OEM number 914488.

21732 omc cobra dipstick

51
21732

OMC Cobra dipstick

$28.95 us

$ 45.89 cdn

23371 Back bearing shim

23371 Cobra upper rear shim .003

52
23371

Shim 0.003″

$ 4.99 us

$ 8.89 cdn

23372 cobra upper rear shim

52
23372

Shim 0.005″

$ 4.99 us

$ 8.89 cdn

23374 Cobra upper rear shim

52
23374

Shim 0.010

$ 4.99 us

$ 8.89 cdn
23376 Upper gearcase rear bearing shim OEM number 911667.

23376 Cobra upper rear shim

52
23376

Shim 0.015″

$ 4.99 us

$ 7.89 cdn

1 to 17

# 18 to # 32