278000965 Temperature Sensor for Sea-Doo Challenger 720 1998 2000-2001

Temperature Sensor for Sea-Doo

This temperature sensor for Sea-Doo watercraft, OEM cross-reference 278000965, tracks engine coolant temperature so overheating can be caught before it causes damage.

Overview

This temperature sensor for Sea-Doo is a replacement sending unit for Challenger 720 models built in 1998, 2000, and 2001. The sensor relays coolant temperature to the gauge or warning circuit, helping the operator monitor engine heat during a run. It suits owners replacing a failed sender or servicing the cooling system as part of seasonal maintenance.

Built For Performance

• Cross-references OEM part number 278000965
• Threaded mount that seats in the factory coolant port
• Sealed connector to keep moisture out of the circuit
• Temperature element calibrated for marine coolant operating ranges
• Low-profile body that fits tight engine compartments

Fits These Machines

• for Sea-Doo Challenger 720, 1998
• for Sea-Doo Challenger 720, 2000
• for Sea-Doo Challenger 720, 2001

On-The-Job Use

• Replacing a sender that reads low, high, or not at all
• Cooling system service before the season starts
• Tracking engine temperature on longer runs
• Diagnosing a suspected overheating issue on the water

Specs At A Glance

Good To Know

Q: How do I know if my original temperature sensor has failed? A: Common signs are a gauge that never moves, reads erratically, or triggers a temperature warning on a cold engine. Comparing readings against actual coolant temperature helps confirm the fault.

Q: Is sealant needed on the sensor threads? A: A thread sealant rated for coolant is often used to prevent weeping at the port, but follow the service manual for your Challenger 720. Confirm thread size and connector match before installing.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.