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Quicksilver

Mercury Thermostat, 170°F (MerCruiser MPI ) 864493

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SKU:
864493
MPN:
864493
Availability:
Usually Ships within 24hours
Weight:
3.01 Ounces
Shipping:
Calculated at Checkout
  • Mercury Thermostat (170°F) 864493
  • MERCURY OEM THERMOSTAT, 864493
MSRP: $33.99
$28.89
— You save $5.10

Not sure if this part fits your engine?
Call our Marine Specialists at (727) 596-5929 or fill out a Contact Form .

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Description

The Quicksilver Thermostat (170°F MerCruiser MPI Dry Joint Cooling Systems) 864493 is a genuine Quicksilver OEM replacement thermostat designed to maintain proper operating temperature for select MerCruiser sterndrive engines equipped with dry joint exhaust and closed cooling systems.

Compatible with the following (engines must have dry joint exhaust and closed cooling):

  • MerCruiser 4.3L MPI
  • MerCruiser 4.5L MPI
  • MerCruiser 5.0L MPI
  • MerCruiser 5.7L MPI
  • MerCruiser 6.2L MPI

This 170°F (77°C) thermostat regulates coolant flow to help the engine reach and maintain its proper operating temperature. Maintaining the correct engine temperature helps optimize performance, fuel efficiency, and engine longevity while supporting proper operation of the closed cooling system.

Replacing a worn or malfunctioning thermostat is an important part of cooling system maintenance and can typically be completed using common hand tools. Refer to your owner's or service manual for proper installation procedures.

To confirm compatibility, contact our team with your engine serial number at (727) 596-5929 before ordering.

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Warranty Information

This product is covered under the manufacturer’s limited warranty when applicable. Warranty coverage varies by manufacturer and product type. Please review our Warranty Coverage & Product Protection page for full details.
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