This CEF Marine impeller for Mercury/Mariner outboards is an aftermarket spare part for the water pump in the engine's cooling system. The impeller circulates cooling water through the engine's cooling circuit and is intended for documented Mercury and Mariner engine variants from 18 to 40 HP.
The impeller has six flexible blades and is manufactured from chloroprene rubber, also known as neoprene. The black impeller features a key/spline drive, an inner diameter of 16 mm, an outer diameter of 73 mm, and an axial C-dimension of 12.6 mm.
Compatibility
For 2-stroke Mercury and Mariner outboards, compatibility is stated as 18/20 (96) as well as 20/25/30/40 HP. For 4-stroke engines, it is stated as 25/30/40 HP. The designation “(96)” is not explicitly defined and should not be interpreted as a specific model year without verifying the engine's serial number.
Replaces OEM numbers
The impeller cross-references to OEM no. 47-85089-1, 47-85089-3, and 47-85089-10. The CEF manufacturer number is 500315, and the shortened manufacturer code is 315. Documented aftermarket references include Sierra 18-3057, Mallory 9-45303, GLM 89640, and Albinus Premium 06-03-057.
Gasket, wedge, key, and service kits are not documented as included. Therefore, check the existing impeller's dimensions, drive type, engine model or serial number, as well as the original part number before ordering and installation.
Always check the engine/drive model and original part number before purchase.
Key featuresAftermarket impeller for engine cooling water pump
For documented Mercury and Mariner outboards
Six flexible blades
Chloroprene rubber/neoprene
Inner diameter: 16 mm
Outer diameter: 73 mm
C-dimension: 12.6 mm
Key/spline drive
CEF manufacturer number: 500315
