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Thermostats (Tohatsu)

Thermostat 3KY-01030-2

Brand: Tohatsu

SKU: 3KY-01030-2

$100.50
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The Genuine Tohatsu Thermostat 3KY-01030-2 is an original replacement cooling-system thermostat for selected 25HP to 60HP Tohatsu four-stroke outboard motors. Designed to regulate engine operating temperature by controlling coolant-water circulation, it helps prevent excessive cooling and overheating while supporting efficient engine performance. Ideal for routine maintenance or replacement of faulty thermostats, this genuine OEM component provides reliable temperature regulation for compatible outboard engines.

Key benefits

Key Benefits

  • - Genuine Tohatsu OEM replacement thermostat.
  • - Regulates engine operating temperature.
  • - Helps prevent overheating and overcooling.
  • - Supports efficient combustion and fuel consumption.
  • - Suitable for selected 25HP–60HP four-stroke outboards.
  • - Replaces earlier thermostat part numbers.
  • - Ideal for cooling-system servicing and maintenance.

Compatible Tohatsu Outboard Motors

  • 4-Stroke Outboards
  • - MFS25C – 25HP: Selected engines from serial number 052360AH, approximately 2019 onwards.
  • - MFS30C – 30HP: Selected engines from serial number 052360AH, approximately 2019 onwards.
  • - MFS40A – 40HP: 2014 onwards.
  • - MFS50A – 50HP: 2014 onwards.
  • - MFS60A – 60HP: 2019 onwards.

Cross-Reference & Superseded Part Numbers

  • Current Genuine Tohatsu Part Number
  • - 3KY-01030-2 – Current thermostat.
  • - 3KY010302M – Genuine Tohatsu ordering number.
  • Confirmed Superseded Part Numbers
  • - 3KY-01030-0 – Superseded by 3KY-01030-2.
  • - 3KY-01030-1 – Superseded by 3KY-01030-2.

Suitable Applications

  • - Routine outboard cooling-system maintenance.
  • - Replacement of stuck-open or stuck-closed thermostats.
  • - Cooling-system repairs following overheating.
  • - Restoration of correct engine operating temperature.
  • - Preventative maintenance on compatible four-stroke engines.

Signs the Thermostat Needs Replacing

  • - Engine overheating.
  • - Engine operating below normal temperature.
  • - Thermostat stuck open or closed.
  • - Excessive corrosion or salt deposits.
  • - Irregular engine temperature.
  • - Damaged thermostat spring or valve.
  • - Thermostat failing an opening-temperature test.

Shipping

Ships Australia-wide