Thermostat for Yamaha 30 40 55 HP 2 STROKE 6F5-12411-03 62°C 140°F 18-3543

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Thermostat for Yamaha

Reference to Yamaha:

6F5-12411-01 6F5-12411-02 6F5-12411-02-00 6F5-12411-03 6F5-12411-03-00 6F5-12411-0300

Reference to Sierra: 18-3543 18-3553 18-3625

Reference to OMC/Johnson/Evinrude:

0434841 0437414 0508620 0508626 0777260 434841 500544 5005440

Reference to Mercury:

62981 66850 75692 75692B 814554001 814554M

814554T01 833072003 833072004

Rated Temperature: 62°C



15EL 15ES (1986-95)

9.9L 9.9S 15L 15S (1986-90)

9.9M 15ML

C55EL 1991-95)

C25EL C40EL (1991-97)

C25ML (1993-97)


C40MS C40PL (1992-97)

C30EL (1991-92)

CV30EL (1989-90)

C40ML (1994-95)

C55TL (1993-95)


CV40EL (1990)

CV55EL (1989)

A thermostat is a component which senses the temperature of a system so that the system's temperature is maintained near a desired setpoint.

Thermostats are used in any device or system that heats or cools to a setpoint temperature, examples include building heating, central heating, air conditioners, HVAC systems, water heaters, as well as kitchen equipment including ovens and refrigerators and medical and scientific incubators. In scientific literature, these devices are often broadly classified as thermostatically controlled loads (TCLs). Thermostatically controlled loads comprise roughly 50% of the overall electricity demand in the United States.[1]

A thermostat operates as a "closed loop" control device, as it seeks to reduce the error between the desired and measured temperatures. Sometimes a thermostat combines both the sensing and control action elements of a controlled system, such as in an automotive thermostat.

The word thermostat is derived from the Greek words θερμός thermos, "hot" and στατός statos, "standing, stationary".