Sierra® Thermostat Kit for Mercruiser® Ford® V8 225, 233, and 255 HP Engines, 1973 - 1977

Item # WX2-167156

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Sierra® Thermostat Kit for Mercruiser® Ford® V8 225, 233, and 255 HP Engines, 1973 - 1977.

Proper thermostat operation is key in getting peak engine performance and maximum fuel efficiency!

This marine-grade Kit will withstand the rigors of "ugly" brackish and saltwater. Sierra® Thermostat Kit (part no. 18-3651) replaces your original thermostat (O.E.M. 807252Q3).

Kit contains:
  • Thermostat (part no. 18-3551)- replaces O.E.M. part no. 59137
  • Thermostat Cover Gasket (part no. 18-2554)- replaces O.E.M. part no. 27-90556
  • Thermostat Cover Gasket (part no. 18-2553)-replaces O.E.M. part no. 27-47510
  • Thermostat Cover Gasket (part no. 18-2834)- replaces O.E.M. part no. 27-60208
  • Thermostat Cover Gasket (part no. 18-2844)-replaces O.E.M. part no. 27-48818-1.

Order up top-quality replacement parts for bottom dollar ONLINE today!

V8 225, 233, and 255 HP Engines, 1973-1977

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This marine-grade Kit will withstand the rigors of "ugly" brackish and saltwater. Sierra® Thermostat Kit (part no. 18-3677) replaces your original thermostat kit.

Kit contains:
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Order up top-quality replacement parts for bottom dollar ONLINE today!


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Sierra® Thermostat Kit for Mercruiser® 340 HP Engines 1981 - 1987, 7.4 Bravo / 350 Mag Engines 1988 - 1995.

Proper thermostat operation is key in getting peak engine performance and maximum fuel efficiency!

This marine-grade Kit will withstand the rigors of "ugly" brackish and saltwater. Sierra® Thermostat Kit (part no. 18-3668) replaces your original thermostat, o ring, and gasket.

Kit contains:
  • Thermostat (part no. 18-3551)-replaces O.E.M. part no. 59137
  • Thermostat Cover Gasket (part no. 18-2552)-replaces O.E.M. part no. 27-33179-2
  • Thermostat Cover Gasket (part no. 18-2553)- replaces O.E.M. part no. 27-47510
  • Thermostat Cover Gasket (part no. 18-2554)- replaces O.E.M. part no. 27-41812
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Order up top-quality replacement parts for bottom dollar ONLINE today!

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Proper thermostat operation is key in getting peak engine performance and maximum fuel efficiency! Get the most "bang" for your boating buck this season with top-notch replacement parts for bottom dollar.

This marine-grade Kit will withstand the rigors of "ugly" brackish and saltwater. Kit 18-3671 replaces O.E.M. part no. 97361. Includes Thermostat (part no. 18-3551) and Gaskets (part no. 18-0875). Compatible with engine models: CH190, CH220, CH270, and CH350.


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Proper thermostat operation is key in getting peak engine performance and maximum fuel efficiency!

This marine-grade Kit will withstand the rigors of "ugly" brackish and saltwater. Sierra® Thermostat Kit (part no. 18-3652) replaces your original thermostat and gaskets.

Kit contains:
  • Thermostat (part no. 18-3552)-replaces O.E.M. part no. 76270
  • Thermostat Cover Gasket (part no. 18-2555)-replaces O.E.M. part no. 27-89656-1
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Order up top-quality replacement parts for bottom dollar ONLINE today!


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