The Genuine Tohatsu 3NV-01030-0 Thermostat is designed for selected 6HP to 30HP 4-stroke outboard motors. Featuring a factory-specified 60°C opening temperature, this genuine OEM thermostat regulates cooling-water circulation to maintain consistent engine operating temperatures. Ideal for replacing corroded, seized or malfunctioning thermostats, it supports reliable engine warm-up, efficient cooling and dependable performance during routine boating operation and scheduled cooling-system maintenance.
Thermostats (Tohatsu)
Thermostat 3NV-01030-0 – 60°C
Brand: Tohatsu
SKU: 3NV-01030-0
$75.60
Key benefits
Key Benefits
- - Genuine Tohatsu OEM replacement thermostat.
- - Factory-specified 60°C (140°F) temperature rating.
- - Suitable for selected 6HP–30HP 4-stroke outboards.
- - Regulates cooling-water circulation.
- - Helps maintain consistent engine operating temperatures.
- - Supports reliable engine warm-up.
- - Helps prevent overheating caused by a thermostat stuck closed.
- - Replaces earlier genuine OEM thermostat references.
- - Suitable for cooling-system servicing and repairs.
Specifications & Dimensions
- - Manufacturer: Tohatsu
- - OEM Part Number: 3NV-01030-0
- - OEM Ordering Number: 3NV010300M
- - Factory Description: Thermostat
- - Opening Temperature: 60°C (140°F)
- - Engine Type: 4-stroke
- - Compatible Horsepower: Selected 6HP, 8HP, 9.8HP, 9.9HP, 15HP, 18HP, 20HP, 25HP and 30HP
- - Installation Location: Cylinder head / thermostat housing
- - Construction: Temperature-sensitive metal valve assembly
Compatible Tohatsu Outboards
- 4-Stroke – 6HP to 9.9HP
- - MFS6BZ – 6HP
- - MFS6CZ – 6HP
- - MFS8A / MFS8A2 / MFS8A3 – 8HP
- - MFS8B / MFS8C – 8HP
- - MFS9.8A2 / MFS9.8A3 – 9.8HP
- - MFS9.8B / MFS9.8C – 9.8HP
- - MFS9.9CY – 9.9HP
- 4-Stroke – 9.9HP to 20HP
- - MFS9.9D – 9.9HP
- - MFS15B2 – 15HP
- - MFS15C – 15HP
- - MFS15D – 15HP
- - MFS18B2 – 18HP
- - MFS20C – 20HP
- - MFS20D – 20HP
- 4-Stroke – 25HP to 30HP
- - MFS25A – 25HP
- - MFS25B – 25HP
- - MFS25C – 25HP
- - MFS30A – 30HP
- - MFS30B – 30HP
- - MFS30C – 30HP
Cross-Reference & Replacement Part Numbers
- Genuine Tohatsu OEM
- - 3NV-01030-0 – Current genuine thermostat.
- - 3NV010300M – Current OEM ordering number.
- - 3R3-01030-0 – Earlier genuine thermostat, superseded.
- - 3R3010300M – Earlier OEM ordering number.
- - 3SA-01030-0 – Earlier genuine thermostat reference, superseded.
- - 3SA010300M – Earlier OEM ordering number.
Signs the Thermostat Needs Replacing
- - Engine overheating or temperature warning activation.
- - Thermostat stuck closed, restricting cooling-water circulation.
- - Thermostat stuck open, causing slow engine warm-up.
- - Irregular or unstable operating temperature.
- - Corrosion or mineral deposits affecting thermostat movement.
- - Damaged or weakened thermostat spring.
- - Visible deterioration of the thermostat valve.
- - Thermostat fails the manufacturer's temperature-opening test.
- - Cooling-system performance remains inconsistent after other faults have been checked.
Important Fitment Information
- - Confirm the exact engine model and serial number before ordering.
- - This is a genuine Tohatsu OEM thermostat, not an aftermarket replacement.
- - Opening Temperature: 60°C (140°F).
- - The 60°C temperature is the thermostat's nominal opening specification, not the engine's maximum permitted operating temperature.
- - Do not select a thermostat based on horsepower alone.
- - Earlier OEM references 3R3-01030-0 and 3SA-01030-0 are listed as replaced by 3NV-01030-0.
- - Do not confuse this thermostat with the optional 3AA-01030-0 70°C thermostat, listed for certain models.
- - Inspect the thermostat cap, gasket and mating surfaces during servicing.
- - Replace damaged or deteriorated thermostat gaskets.
- - Clean corrosion and deposits from the housing before installation.
- - Follow the manufacturer's installation and tightening specifications.
- - Verify correct cooling-system operation after replacement.
Shipping
Ships Australia-wide