Sierra® Thermostat Kit for Cobra® 4.3L, 4.3HO, 5.0L, 5.8L, and 5.8L EFI, 1991 - 1997

Item # WX2-167167

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Non-Member $26.99 Buyer's Club $24.29
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Details & Specs

Sierra® Thermostat Kit for Cobra® 4.3L, 4.3HO, 5.0L, 5.8L, and 5.8L EFI Engines, 1991 - 1997.

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. 18-3677) replaces your original thermostat, thermostat gasket, and o-ring.

Kit contains:
  • Thermostat - replaces O.E.M. part no. 3856961
  • Thermostat Gasket (part no. 18-2917) - replaces O.E.M. part no. 3852111
  • O-ring (part no. 18-7170) - replaces O.E.M. part no. 3852071.

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!

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:
  • Thermostat - replaces O.E.M. part no. 3856961
  • Gasket (part no. 18-2917) - replaces O.E.M. part no. 3852111
  • O-ring (part no. 3852071) - replaces O.E.M. part no. 3852071

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


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

Item # WX2-167162

Non-Member $19.99 Buyer's Club $17.99

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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
  • O Ring (part no. 18-7173)- replaces O.E.M. part no. 25-30224.

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

1981-1987, 7.4 Bravo / 350 Mag Engines 1988-1995

Sierra® Delco® Tune - up Kit for V8 Mercruiser® Inboard and Sterndrive Engines

Item # WX2-165585

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Sierra® Delco® Tune - up Kit for V8 Mercruiser® Inboard and Sterndrive Engines.

Get your boat in ship-shape with top-notch replacement parts for bottom dollar! Connections corrode over time, leading to poor performance.

A simple Tune-up Kit like this can make a BIG improvement in how your boat feels on the water. Kit includes Distributor Cap and Rotor. Replaces O.E.M. part #808483Q2.

For engines:
  • Mercruiser® 5.0L EFI 1998
  • Mercruiser 5.7L EFI 1995-1998
  • Mercruiser 5.7LX 1996-2001
  • Mercruiser 350HP Mag 1996-1997
  • Mercruiser 350HP Mag Bravo / MPI / MIE 1995-2001
  • Mercruiser 350HP Mag Ski 1994-1998
  • Mercruiser 454HP Mag, MPI, Horizon, and MIE 1994-2001
  • Mercruiser 8.2L MPI and MIE 1996-2001.

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