SKU: MOR63760
UPC: 084663637605
MPN: 63760
The Moroso 63760 is a thermostatic switch built to automate electric water pump control on a vehicle cooling system. It reads coolant temperature and runs the pump only when the engine needs it, which stops the parasitic battery drain that comes from leaving an electric pump running constantly. This is the control unit for anyone running a Moroso electric pump on a street car, hot rod, or race build who wants temperature-driven operation instead of a manual toggle that stays on whenever the key is up. It ships as a kit with the switch and a sending unit, so the temperature reference and the switching logic come matched out of the box.
The switch turns the pump motor on once coolant climbs past 160°F (±5°) and shuts it off again at 140°F (±5°), giving roughly a 20-degree operating band that keeps the motor from short-cycling. A toggle gives three settings — Automatic for thermostatic control, Manual to force the pump on, and Off — so you can prime the system or run the pump during cooldown without chasing temperature thresholds. Electrical rating is 15 amps at 32 volts, and Moroso specifies a 10 amp fuse, which is not included in the kit. It measures 5.0 inches deep, 3.75 inches wide, and 1.625 inches tall, and it is manufactured in Connecticut. Per manufacturer specifications, the 63760 controls Moroso pump models 63539 through 63595 and the Electric Water Pump Drive Kit 63750.
Wire this switch in when you convert to an electric pump or want hands-off cooling management on an engine that sees both street miles and track time. The Automatic mode handles normal driving, while the Manual setting is useful for purging air during a fill or running coolant after shutdown on a hot motor. Pair it with the matched sending unit it ships with, and protect the circuit with the specified 10 amp fuse. For the rest of the wiring side of the job, see our fuse holder and toggle switch options, or browse the full ignition and electrical catalog.
The switch engages the electric water pump when coolant temperature exceeds 160°F (±5°) and shuts it off once temperature drops back to 140°F (±5°). That roughly 20-degree band keeps the pump from short-cycling and prevents it from running when the engine does not need cooling.
Per manufacturer specifications, it controls Moroso electric water pump models 63539, 63546, 63547, 63555, 63557, 63565, 63570, 63575, 63585, and 63595, plus the Electric Water Pump Drive Kit 63750.
It ships as a kit with the thermostatic switch and a matched sending unit. You will need a 10 amp fuse to protect the circuit, which is not included. The switch is rated for 15 amps at 32 volts.
The toggle has Automatic, Manual, and Off positions. Automatic runs the pump on temperature alone. Manual forces the pump on regardless of coolant temperature, useful for priming or cooldown. Off disables the pump entirely.
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