This CEF Marine water pump impeller for Yamaha/Mariner outboard motors is a replacement impeller for the engine's cooling water pump. It is used on compatible Yamaha and Mariner engines with 9.9 or 15 hp in 2-stroke versions, as well as 8 or 9.9 hp in 4-stroke versions.
The impeller is made of neoprene and has six flexible blades. The keyed hub transfers rotation from the pump shaft, allowing the impeller to circulate cooling water through the engine's cooling system. The product is the impeller itself and not a complete water pump kit.
The impeller has an inner shaft/hub diameter of 13 mm, an outer diameter of 40 mm, and an axial depth of 22 mm. The CEF Marine part number is 500320, while the manufacturer code field is 320.
Compatible engine models
Documented Yamaha compatibility includes 9.9 and 15 hp from 1984-1995, F9.9 from 1985-1998, FT9.9 from 1985-1990, and T9.9 from 1985-1999. General application also includes Yamaha 8/9.9 hp 4-stroke when the engine's original spare part number matches the impeller's OEM reference.
Documented Mariner applications include 9.9C with engine code 682/684 from 1982-1986, as well as 15C, 15K, and 15W with engine code 682/684 from 1980-1995. Compatibility should always be verified based on engine model, year, and original spare part number.
Replaces OEM numbers
Direct references include Yamaha 682-44352-01-00 and Mariner/Mercury 47-84027. Supplementary cross-references include Yamaha 682-44352, 682-44352-00 and 682-44352-01, Mariner/Mercury 47-84027M and 47-84027T, Sierra 18-3074, Mallory 9-45605, GLM 89880, RECMAR REC682-44352-01, and Albinus 06-03-067.
Always check engine/drive model and original part number before purchasing.
Key featuresWater pump impeller for Yamaha and Mariner outboard motors
For 9.9/15 hp 2-stroke and 8/9.9 hp 4-stroke
Made of neoprene
6 flexible blades
Keyed hub
Inner diameter: 13 mm
Outer diameter: 40 mm
Axial depth: 22 mm
CEF Marine part number: 500320
