Alpha 1 stern drive parts / Outdrive drawings

Mercruiser Alpha 1 O-ring lower gearcase part
T.C.Electronics / Marine home page
Aluminum propellers
Alpha 1 parts exploded upper gearcase drawing
Upper gearcase faster loading tech drawing
Alpha 1 parts exploded lower gearcase drawing
Lower unit gearcase complete
1984 thru 1990 replacement lower unit gearcase
1984 thru 1990 replacement upper unit gearcase assembly
Outdrive repair cost
Alpha bell housing parts & drawing
Alpha shift cable and transom parts
Alpha 1 Gimbal housing drawing
Alpha One used parts
Anode
Bearings (upper gearcase)
Bearing retainer nut
Bearing retainer tool
Ball bearing used in lower gearcase
Bearing seals gears lower gearcase
Bearings seals & shims for lower gearcase
Bearing carrier seal upper gearcase
Bearing carrier lower gearcase
Bushing
Carrier assembly
Cover nut
Clip
Clutch dog
Cluch dog spring
Cover assembly
Cross Pin
Drain screw
Drive shaft (upper gearcase)
Drive shaft pinion bearing
Drive shafts
Exhaust bellow
Forward & pinion gears
Forward gear shims
Gasket for wear plate
Gasket for water pocket
Gasket (lower)
Gears bearings shims seals upper gearcase
Gimbal bearing
Impeller
Keys
Insert (port)
Insert (starboard)
Lock nut
Lockwasher
Lock nut (upper)
Lower gear housing (empty)
Magnesium anodess
Nut assembly
Oil pump for lower unit
Oil seal (lower)
Oil seal water pump
Oil seal for yoke
O-ring (lower)
O-ring (lower)
Outdrive gasket kit
Pinion nut
Plug
Pipe plug
Propeller Hardware
Propeller or prop shaft
Prop Nut
Retainer nut
Retainer (lower)
Ring (upper)
Roller bearing from lower gearcase
Reverse gear
Screw wear plate cover
Screw for top cover
Seal kit upper gearcase
Seal kit lower gearcase
Seal (lower)
Shims (upper)
Shift cable assemblies
Shift shaft
Shift Spool
Shims lower gearcase
Shims (forward gear)
Shims upper gearcase
Shift crank
Screw water pocket
Socket
Spacer for bearing
Tools
Trim cylinders with parts layout
Trim cylinder hoses & drawing
Transom service kit
Tapered bearings for lower gearcase
Trim Cylinder hose drawing
Trim cylinder parts hoses drawing
Tab washer
Tab Washer
Thrust Hub
Thrust Ring
Trim cylinder application chart
Trim cylinder components
Tube guide
Used Alpha One upper units
Upper gearcase housing (empty)
U-joint
U-joint bellow
Washer (lower)
Water pocket cover kit
Water pump
Water pump housing
Water pump base
Water pump tube
Washer tension for drive gear
Washer set
Washer gaskets
Wear plate (lower)
Welch plug
Yoke (drive shaft)
Yoke (short shaft)
Alpha 1 shift cable assembly
Drive shaft adaptor
Drive gear shimming tool
Shift bushing
Washer set (lower)
Washer clip (lower)
Seal for oil passage
GLM Marine aftermarket Mercruiser Alpha 1 O-ring
  • OEM number :  25-90011
  • GLM Marine part number : 81390
  • 5 O-rings included in set
  • 2.188 I.D. (inner diameter)
  • Also included in the complete water pump kit 
  • O-ring identified as part number 20 on Alpha 1 lower gearcase drawing page

  # 81390 Alpha 1 O-Ring $9.79

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