1 years
China
Certification
Manufactured in ISO9001‑certified production facility. CE documents available upon buyer’s request.
Real Product Photos
Water pump impeller overall view, impeller blade close‑up shot, shaft bore detailed view, outboard water pump assembly installation reference picture
This rugged marine water pump impeller is a practical aftermarket replacement with OE numbers 3B2‑65021‑1, 3B2‑65021‑0, 47‑8037481, 8037481 and cross‑reference Sierra 18‑8920 for Mercury and Mercruiser outboard engines.
Crafted from high‑quality marine‑grade rubber compound, this impeller brings good flexibility, strong tear‑resistant performance and dependable salt‑water corrosion resistance. It can hold steady blade shape while enduring continuous rotary loads. Timely replacement can greatly lower risks of blade cracking, surface scuffing and premature wear under harsh salt‑water boating conditions.
Every dimensional parameter and inner‑bore tolerance closely follows OEM standards. Operators can finish fast and accurate drop‑in fitting without further adjustments. This replacement resolves typical cooling‑system faults such as engine overheating, inadequate cooling‑water flow, weak water discharge and heavily worn‑out impeller blades.
Swap out your worn or cracked original impeller with this unit, and you will restore smooth cooling‑water circulation for your outboard motor. Apply dedicated water‑pump lubricant during assembly. Never run the motor without water supply. Proper fitting guarantees stable, long‑lasting cooling performance for real‑world marine working scenarios.
Water Pump Impeller for Tohatsu 3B2-65021-1
Sierra:18-8920
CEF 500344
No. Blades: 6
Depth /Height/ Width: 18mm
Outer/External impeller diameter: 40mm
Internal shaft insert/hub diameter: 12.1mm
Net Weight:25g
MFS8A3 MFS9.8A3
Tohatsu Two stroke : M6B M8B M9.8B
Tohatsu 4-stroke:MFS8 MFS9.8 F9.8A F8A MFS6A3 MFS8A2 MFS9.8A2
MFS8A3 MFS9.8A3
Nissan 2-stroke:NS8 NS9.8
Nissan 4-stroke:NSF8 NSF9.8