Boat Parts.CA ( Click here for home page )

OMC parts drawing *Cobra *Mercruiser *Alpha SEI outdrives

Johnson/Evinrude & Mercury outboard motors lower units
Mercruiser/Alpha 1/Generation 2 outdrive drawings
OMC Cobra stern drive, Electric shift & 400/800 OMC parts

Search by part number or description here

Click item listed below for exploded view parts drawing

OMC Cobra parts / Outdrive years 1986 to 1993
Cobra upper gearcase layout

Cobra upper gearcase

OMC Cobra lower gearcase parts layout

Lower unit exploded view

OMC Cobra transom parts 1986-1993

Transom | shifter parts

400/800 outdrive parts 1978 to 1985
OMC parts drawing 400-800 series
Upper gearcase components 1978-1985
OMC 800 Series lower unit 1978-1985

Lower unit parts drawing

Select 3.375 or 4.250 inch hub size

OMC stringer intermediate housing
Intermediate housing

Stringer electric shift upper lower unit years 1972 to 1977
87620 Gearcase seal kit

Gearcase seal kit

Gear head assembly
Stringer lower unit
OMC electric shift outdrive lower unit

Stringer electric shift

Gear head assembly
Gear head assembly
Shift Cable Wire
Shift cable wire

Mercruiser outdrive parts years 1970 to 1983

Mercruiser Alpha One upper gearcase
Mercruiser Alpha One
Mercruiser lower gearcase
Mercruiser bell housing layout
Mercruiser bell housing
SE106 V8 350-305 Chevy

SEI-106 V8 350-305 Chevy motor

SEI lower unit

SEI lower unit


Mercruiser Alpha One outdrive 1984 to 1990
Mercruiser upper housing parts drawing

upper gearcase

Mercruiser Alpha 1 lower unit parts drawing

Mercruiser Alpha 1 lower unit
parts drawing

SE106 SEI Mercruiser Alpha 1 upper gear case

SEI-106 Mercruiser Alpha 1 upper gear case

SEI 106 Aftermarket lower unit

SEI 106 Aftermarket lower unit

Mercruiser Alpha 1 Gen 2 outdrive components 1991 & up
Mercruiser generation 2 upper gearcase
Alpha One Gen 2 Upper Unit
Mercruiser generation 2 lower unit
Alpha 1 Gen 2 Lower Unit
116 SEI sterndrive replacement

SEI 116 sterndrive replacement

SE116 Mercruiser Alpha One Gen 2 lower unit
SEI 116 Mercruiser Alpha One Gen 2

V6-V8 Mercruiser exhaust manifold-riser applications
*Engine bellows applications 4.3 to 5.7 liter
Exhaust Manifolds
Mercruiser exhaust manifold
Riser screws & gasket
Riser screws & gasket
Transom bellows kit
Bellows kit

Mariner / Mercury outboard parts

Mercury Motor

Mercury outboard parts

Seal kit 35-70 hp.

Seal kit 35-70 hp.

11240 Mercruiser Alpha 1 Gen 2 Gear set

gear set

Mercury outboard 4 cylinder 40-115 hp.
Mercury water pump
Gear and bearing puller
Gear and bearing puller

Evinrude/Johnson water pump and seal kits
New lower unit

Gear set

Gear sets

87600 Johnson seal kit

Johnson seal kits

Johnson/Evinrude outboard parts 9.9 & 15 hp 1974-2006

Johnson/Evinrude outboard parts 9.9 & 15 hp 1974-2006

39380 (2 Cylinder)

(2 Cylinder)

Evinrude/Johnson water pump kits
Water pump kits
39380 (2 Cylinder)

(2 Cylinder)

In-line fuel filter.375 hose
In-line fuel filter.375 hose

What,s New


  • SEI Marine products including aftermarket Mercruiser Alpha One and generation 2 outdrive boats
  • Have a new aftermarket OMC Cobra and OMC 400/800 parts for lower unit gear case
  • Upper - lower units gear-case are OEM outdrive replacement for both Mercury and Johnson / Evinrude
  • We carry all inboard-outboard upper gear case gear ratios for Outboard Marine Corporation 4 cylinder, 6 cylinder and V8 engines up to 300 horse power
  • Upper unit can come with and without the 9 9/16” long yoke on the upper drive shaft.
  • Our complete drive shipped in two pieces and will require an installation kit the includes nut kit, mounting gasket and mounting bolts. Other accessories like anodes and shift cables need to be ordered separate

New Mercruiser Repair Tools

  • Mercruiser repair tools including P/N Keen 75057 3" Scotch-Brite polishing wheel. Used for the inside upper gearcase bearing area on Alpha 1 and Alpha One Gen 2 outdrives. Scotch-Brite area must be cleaned with lacquer thinner to remove small particles and allows bearing, yoke and gear assembly to side in to upper gearcase. Note polishing and cleaning wheel will require the use of any 1/4 " or larger electric drill and should be use at highest rpm setting.
  • Piston ring installer is used to line up a bearing during bearing and yoke installation
  • 3/16 inch retainer wrench that's painted black. Spanner nut wrench and bearing retainer wrench installs and removes drive shaft bearing retainer on MC-1 / R / MR / Alpha 1 / Alpha 1 Gen 2, Blackhawk, and Bravo OEM: 91-17256
  • Universal puller plate. Pulls gears and bearings OEM: 91-37241
  • Seloc manuals for Alpha one or generation 2
  • Complete rebuild package for 1.50 / 1.47 gear ratio for V8 models 20 / 22 tooth count for years 1974 to 1990 serial numbers (3856268-0D469858)
    Parts included:
    11210 Gear set
    87500 Seal kit
    39590 Mounting gasket
    21560 Bearing, 21520 Bearing and 21510 Bearing
    23260 Shims, 23270 Shims and 23280 Shim set

Sterndrive Repair

  • 400/800 Series upper gearcase OMC repair including sandblasting, ball gear bearing shims, driven gear bearing shims and plastic ball gear retainer shim kit
  • Boat repair price listed on rebuild and re-manufactured gear cases with quick shop turn around times. Any questions please contact order desk for details
  • Gear cases are painted with two coats zinc chromate primer and two coat of epoxy white paint or color match metallic paint.
  • All gear ratios available for 400/800 and Stringer model upper units for years 1970 to 1985
  • Pricing includes left or right handed worm gear with half moon steering gear installed with the top cap
  • Includes all labor, welding bearings, seals, replacement ball gear, water pump assembly kit parts
  • Note - additional OMC parts may be required if necessary. Please see parts breakdown page for additional part pricing
  • OMC Cobra sterndrive repairs and OMC parts
  • We have common new and used boat parts in stock for electric shift lower units years 1968 to 1977

GLM Marine Products

  • Serving both the United States and Canada, Boat offers a full range of parts including used outdrives and electric shift units
  • Outdrives for the Cobra, Stringer and 400, 800 OMC sterndrive units

Electric Shift Outdrive parts

  • We specialize in 400-800 Electric shift repairs and parts, Cobra and Mercruiser upper gear case and lower unit repairs / rebuilds and carry a full line of used parts
  • We also carry a full line of GLM Marine aftermarket Mercruiser / Alpha 1 outdrive units. Johnson, Evinrude, Yamaha and Mercury outboard parts

Johnson outboard parts

  1. We now carry Johnson Evinrude outboard gears, seal kits, Sierra water pumps, propeller shafts and tools. GLM now carrier stainless steel and aluminum fuel filters with 100 micron screen
  2. OMC exploded view drawings for all outdrive models including Outboard Marine Corporation OEM numbers makes finding your stern drive part easy
  3. Mercruiser parts catalog and GLM Marine Johnson / Evinrude parts catalog and 400 800 Stringer series OMC parts