Mercury Marine water pump impeller 47-161541 is an original impeller for the cooling water pump in compatible Mercury and Mariner outboard motors. The flexible impeller has six blades and circulates cooling water through the engine's cooling system. It is made of elastomer with a reinforced center insert.
The impeller has an outside diameter of approx. 44.1 mm, a shaft/bore diameter of approx. 17.12 mm, and a height of approx. 20.25 mm. It is used in documented gear housing and jet water pump units for selected 25 and 30 hp engines.
Compatibility includes specific Mercury and Mariner models with two- or three-cylinder two-stroke and four-stroke engines. Documented variants include 25, 25 EFI, 25 Jet, 25 Jet EFI, 30, and 30 EFI, but the specified serial number ranges must always be checked before ordering.
Part number 47-161541 also appears as 47-16154-1 and has later been replaced by 47-8M0214912. Documented Tohatsu/Nissan cross-references are 345-65021-0, 345650210M, 3R0-65021-0, and 3R0650210M. Compatibility with a specific Tohatsu or Nissan engine must be verified based on the OEM number, as there is no documented model compatibility for these engines.
Key featuresOriginal Mercury Marine water pump impeller
Part number: 47-161541
Newer replacement number: 47-8M0214912
Number of blades: 6
Outside diameter: approx. 44.1 mm
Shaft/bore diameter: approx. 17.12 mm
Height: approx. 20.25 mm
For documented Mercury and Mariner models
Always check the engine serial number and part number before purchasing
