This water pump impeller for Mercury/Mariner outboard motors from CEF Marine is a flexible impeller for the engine's cooling water pump. It circulates cooling water through the cooling system and is intended as a replacement part for selected Mercury and Mariner engines. The manufacturer number is 500312.
The impeller has six blades and measures 51.8 mm in outer diameter, 19.13 mm in inner diameter, and 19 mm in width. It features a key drive, which means it is mounted on a shaft with a drive key or feather key. The scope of delivery includes the impeller itself; the gasket and drive key are not stated as included.
The impeller is made of black neoprene in a CR rubber compound. The material is intended for normal cooling water conditions in freshwater and saltwater. In case of water heavily contaminated with oil or chemicals, an impeller with a different, suitable material type must be used.
Compatibility includes selected Mercury and Mariner 2-stroke engines. The general engine specification covers 30, 35, 50, 60, 65, and 70 hp in specified 3-cylinder versions, as well as the separate 40/125 hp specification for 4-cylinder versions. There is no documented general compatibility with 4-stroke engines, and the cylinder specification must not be confused with the engine cycle count.
Compatible Mercury engines
Documented applications for CEF 500312 include the following engine power ratings and serial number ranges: 30 hp, 1217222-1448139; 35 hp, 1571114-1812753 and 6445653-B110788; 40 hp, 1279685-1476509, 2874704-3336257, 4362215-4860102 and 4862103-6445652; 45 hp, 1476510-1520983, 1520984-1531568, and 5531630 and later; 50 hp, 1421113-1639472, 1521914-2305100, 2305101-2858813, 4357640-4962055, and 4962056 and later; 60 hp, 6428681 and later; 65 hp, 2803562-3293183; 70 hp, 4571652-4977156 and 4977157-6428680.
Compatible Suzuki engines
The impeller can also be used for Suzuki DT55 and DT65 2-stroke engines with OEM no. 17461-95201. Compatibility is documented for the model years 1985-1995. For engines from 1996-1997, the OEM number must be verified directly before ordering.
Replaces OEM numbers
Mercury/Mariner: 47-20268, 47-65959, 47-89983 and 47-89983T.
Suzuki: 17461-95201.
47-89983 has been replaced by 89983T. Alternative aftermarket cross-references are Sierra 18-3007, Mallory 9-45300, and GLM 89830.
1516312
Related spare parts
CEF pump kit BK0007 is documented for Mercury 30 hp with serial number 1217222-1448139 and is cross-referenced to 46-77516A3. CEF pump kit BK0006 is documented for selected Mercury 50, 60, and 70 hp applications and is cross-referenced to 46-77177A3. Mercury drive key 28-56654 is a separate spare part for relevant water pump installations. Pump kits and drive keys are not automatically included and must be selected based on engine model and serial number.
Always check the engine make, cycle count, number of cylinders, serial number, and original part number before purchasing. Engine power alone is not sufficient for safe identification.
Key features
Flexible impeller for the engine's cooling water pump
CEF Marine manufacturer no. 500312
Outer diameter: 51.8 mm
Inner diameter: 19.13 mm
Width: 19 mm
6 blades
Key drive for shaft with drive key or feather key
Black neoprene, CR rubber compound
For selected Mercury, Mariner, and Suzuki outboard motors
