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Water Pump Impellers (Tohatsu)

Water Pump Impeller – 369-65021-1

Brand: Tohatsu

SKU: 369-65021-1

$19.30
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The Genuine Tohatsu Water Pump Impeller 369-65021-1 is an OEM replacement component designed for the cooling water pump on compatible Tohatsu outboard motors. The flexible impeller blades draw water through the cooling system to help maintain safe engine operating temperatures. Ideal for routine servicing or replacing a worn, cracked or damaged impeller, this genuine replacement part helps maintain reliable cooling water circulation and protects against overheating.

Key benefits

Key Benefits

  • - Genuine Tohatsu OEM water pump impeller.
  • - Suitable for selected 2.5HP–6HP outboard motors.
  • - Six-blade design for cooling-water circulation.
  • - Compact dimensions for smaller outboard water pumps.
  • - Helps maintain consistent engine operating temperatures.
  • - Supports reliable cooling-system performance.
  • - Replaces earlier OEM impeller 369-65021-0.
  • - Suitable for routine servicing and preventative maintenance.
  • - Supplied individually.

Specifications & Dimensions

  • - Manufacturer: Tohatsu
  • - OEM Part Number: 369-65021-1
  • - OEM Ordering Number: 369650211M
  • - Factory Description: Water Pump Impeller
  • - Outside Diameter: 33.6 mm (1.323")
  • - Impeller Height / Width: 14.3 mm (0.563")
  • - Shaft / Bore Diameter: 10.25 mm (0.404")
  • - Number of Blades: 6
  • - Drive Type: Keyed shaft
  • - Material: Flexible rubber impeller with hub
  • - Engine Type: Selected 2-stroke and 4-stroke
  • - Compatible Horsepower: Approximately 2.5HP–6HP, depending on model

Compatible Tohatsu Outboards

  • 2-Stroke Outboards
  • - M2.5A / M2.5A2 – 2.5HP
  • - M3.5A / M3.5A2 – 3.5HP
  • - M3.5B / M3.5B2 – 3.5HP
  • - M4C – 4HP
  • - M5B / M5BS – 5HP
  • 4-Stroke – 2HP to 3.5HP
  • - MFS2A / MFS2B / MFS2C – 2HP
  • - MFS2.5A / MFS2.5B / MFS2.5C – 2.5HP
  • - MFS3.5A / MFS3.5B / MFS3.5C – 3.5HP
  • 4-Stroke – 4HP to 6HP
  • - MFS4A2 / MFS4B / MFS4C – 4HP
  • - MFS5A2 / MFS5B / MFS5C – 5HP
  • - MFS6A2 / MFS6B / MFS6C – 6HP

Supplier interchange catalogues identify this impeller for selected Japanese-manufactured models

  • - Mercury / Mariner 2HP, 2.5HP and 3.3HP 2-stroke: Selected models.
  • - Mercury / Mariner 4HP, 5HP and 6HP 4-stroke: Selected models.

Cross-Reference & Replacement Part Numbers

  • Genuine Tohatsu OEM
  • - 369-65021-1 – Current genuine water pump impeller.
  • - 369650211M – Current OEM ordering number.
  • - 369-65021-0 – Previous genuine impeller, superseded.
  • - 369650210M – Previous OEM ordering number.

Mercury & Mariner OEM Cross-References

  • - 47-16154-3 – Supplier-published Mercury / Mariner reference.
  • - 8M0204676 – Supplier-published Mercury reference.

Aftermarket Cross-References

  • - Sierra 18-3098
  • - CEF 500377
  • - Mallory 9-45302

Signs the Water Pump Impeller Needs Replacing

  • - Reduced or intermittent cooling-water flow.
  • - Engine overheating during operation.
  • - Cracked, hardened or damaged impeller blades.
  • - Missing or broken rubber vanes.
  • - Excessive wear around the impeller hub.
  • - Impeller blades have developed a permanent set.
  • - Cooling-water circulation becomes unreliable.
  • - Impeller damage discovered during lower-unit servicing.
  • - Replacement is due under the manufacturer's maintenance schedule.

Important Fitment Information

  • - Confirm the complete outboard model and serial number before ordering.
  • - This is a genuine Tohatsu OEM impeller, not an aftermarket replacement.
  • - Outside Diameter: 33.6 mm.
  • - Impeller Height: 14.3 mm.
  • - Shaft Bore Diameter: 10.25 mm.
  • - Number of Blades: 6.
  • - Supersedes 369-65021-0.
  • - Suitable for selected 2-stroke and 4-stroke outboards.
  • - Check the original impeller dimensions and drive-key arrangement.
  • - Inspect the water pump housing, liner, guide plate and gaskets during servicing.
  • - Replace worn or damaged pump components as required.
  • - Ensure the impeller drive key is correctly positioned during installation.
  • - Never operate the water pump dry.
  • - Follow the manufacturer's installation instructions.
  • - Confirm proper cooling-water circulation after replacement.

Shipping

Ships Australia-wide