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Mercruiser Alpha 1 water pump base o ring *2.188" I.D.

GLM Marine aftermarket 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

Mercruiser exploded view drawings
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81390 Mercury o ring

81390 Mercury o ring

P/N 81390 Alpha 1 O Ring $9.29

Customers who bought P/N 81390 also purchased:

Gen 2 26-816575A3
Gen 2 26-816575A3

P/N 87511 GLM Marine gasket and seal kit. Replaces Mercury 26-816575A3. $45.15

12043 Impeller kit OEM 47-43026K06

12043 Impeller kit OEM 47-43026K06

P/N 12043 Water pump impeller kit for Mercruiser 1991 and up models.
Impeller $31.15

Includes coupling assembly P/N 12824 #816597A1
(1991 and up) S/N OD469859 and up