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Fuel Pumps (Tohatsu)

Fuel Pump Assembly – 3H6-04000-7

Brand: Tohatsu

SKU: 3H6-04000-7

$150.90
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The Genuine Tohatsu Fuel Pump Assembly 3H6-04000-7 is an OEM replacement mechanical fuel pump designed for selected Tohatsu 4HP to 9.8HP four-stroke outboard motors. This engine-mounted diaphragm pump helps deliver fuel from the supply system to the carburettor for reliable operation. Ideal for replacing worn, leaking or faulty fuel pumps, it provides a genuine replacement solution for routine maintenance, fuel system servicing and engine repairs.

Key benefits

Key Benefits

  • - Genuine Tohatsu OEM fuel pump assembly.
  • - Designed for selected 4HP–9.8HP four-stroke outboards.
  • - Mechanical diaphragm-operated fuel delivery.
  • - Helps maintain reliable fuel supply to the carburettor.
  • - Suitable for replacing leaking or faulty pumps.
  • - Complete fuel pump assembly — not a diaphragm repair kit.

Compatible Outboard Motors

  • Tohatsu Four-Stroke – 4HP–6HP
  • - MFS4A2 – 4HP
  • - MFS4B – 4HP
  • - MFS4C – 4HP
  • - MFS4D – 4HP
  • - MFS5A2 – 5HP
  • - MFS5B – 5HP
  • - MFS5C – 5HP
  • - MFS5D – 5HP
  • - MFS6A2 – 6HP
  • - MFS6B / MFS6BZ – 6HP
  • - MFS6C – 6HP
  • - MFS6D – 6HP
  • Tohatsu Four-Stroke – 8HP–9.8HP
  • - MFS8A / MFS8A2 / MFS8A3 – 8HP
  • - MFS8B – 8HP
  • - MFS9.8A / MFS9.8A2 / MFS9.8A3 – 9.8HP
  • - MFS9.8B / MFS9.8BX – 9.8HP

Selected Japanese-manufactured carburetted engines

  • - Mercury 4HP, 5HP and 6HP
  • - Mariner 4HP, 5HP and 6HP

Cross-Reference & Superseded Part Numbers

  • Genuine Tohatsu References
  • - 3H6-04000-7 – Current fuel pump assembly
  • - 3H6040007M – Ordering reference
  • - 3H6040007 – Unhyphenated reference
  • Earlier Tohatsu Part Numbers
  • - 3H6-04000-0
  • - 3H6-04000-1
  • - 3H6-04000-2
  • - 3H6-04000-3
  • - 3H6-04000-4
  • - 3H6-04000-5
  • - 3H6-04000-6
  • Mercury / Mariner Cross-References
  • - 803529A04
  • - 803529T04
  • - 803529T06
  • Aftermarket Cross-References
  • - Sierra 18-8865
  • - GLM 40670

Suitable Applications

  • - Replacement of faulty mechanical fuel pumps.
  • - Four-stroke outboard fuel system servicing.
  • - Repair of fuel delivery problems.
  • - Carburettor fuel supply maintenance.
  • - Replacement of leaking or damaged diaphragm pumps.
  • - Outboard engine maintenance and repairs.

Signs the Fuel Pump Needs Replacing

  • - Engine starts but stalls due to insufficient fuel delivery.
  • - Difficulty starting despite an adequate fuel supply.
  • - Engine hesitation or loss of power under load.
  • - Damaged or deteriorated pump diaphragm.
  • - Fuel leakage around the pump housing.
  • - Cracked or damaged pump body.
  • - Inconsistent fuel supply caused by faulty internal check valves.

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