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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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Maintain reliable engine cooling with the Genuine Tohatsu 369-65021-1 Water Pump Impeller, designed for selected 2.5HP to 6HP 2-stroke and 4-stroke outboard motors. Featuring six flexible blades, this genuine OEM impeller circulates cooling water through the engine to help prevent overheating. Ideal for scheduled servicing and preventative maintenance, it provides a direct replacement for worn, hardened, cracked or damaged water pump impellers.

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