CEF Marine water pump impeller for Mercury/Mariner outboard motor is a flexible impeller for the cooling water pump on documented 20 HP and 30 HP engine applications. The impeller circulates cooling water through the engine's cooling system and is supplied with a gasket.
The impeller is made of neoprene and has six flexible blades. It has an inner diameter of 15.95 mm, an outer diameter of 51.2 mm, and a height of 19.05 mm. The hub has a key drive. A key or drive key is not specified as included.
Compatible engine models
Compatibility includes documented Mercury and Mariner applications with 20 HP as well as 30 HP, 2-cylinder 2-stroke outboard motors. It is also cross-referenced to the Mercury 20 HP model 200 via OEM numbers 47-65958 and 47-89982. A modern 20 HP engine is not automatically compatible.
For the Mercury 20 HP model 200, OEM 47-65958 is linked to serial numbers 3537531–4709592, 7012358–7098522, 8006265–8045198, and 9016254–9157229, as well as subsequent series from 4709593, 7098523, 8045199, and 9157230.
Replaces OEM numbers
The impeller cross-references to Mercury/Mariner OEM 47-65958 and 47-89982. Number 47-65958 has been replaced by 89982. Additional aftermarket cross-references include Mercury 47-56780 and 47-89982B, Sierra 18-3052, GLM 89820, and Mallory 9-45311.
Related part numbers
The CEF part number is 500311G, where G indicates that a gasket is included. The shortened designation 500311 is also used. Sierra 18-3252 is an impeller service kit, and Sierra 18-3448 is a water pump kit, both of which are related via the Sierra 18-3052 cross-reference.
1516311
Always check your engine/drive model, serial number, and original part number before purchasing.
Key features
Water pump impeller for the engine's cooling system
For Mercury/Mariner 20 HP and 30 HP 2-cylinder 2-stroke outboard motors
6 flexible blades
Inner diameter: 15.95 mm
Outer diameter: 51.2 mm
Height: 19.05 mm
Material: Neoprene
Key drive for drive shaft
Gasket included
CEF part number: 500311G
