278000194 Temperature Sensor for Sea-Doo Speedster 650 1994-1995

Temperature Sensor for Sea-Doo

This temperature sensor (OEM cross-reference 278000194) monitors coolant temperature and relays that reading to your watercraft's gauge or warning system so overheating is caught early.

Overview

This temperature sensor is a direct-fit replacement for the Sea-Doo Speedster 650 built between 1994 and 1995. The sensor reads engine coolant temperature and sends the signal your gauge or warning circuit depends on, helping you spot trouble before it becomes a breakdown. It is aimed at owners doing routine maintenance or replacing a failed sender.

Built For Performance

• OEM cross-reference 278000194 for straightforward matching
• Threaded body designed to seat cleanly in the factory port
• Sealed construction resists moisture in marine engine bays
• Single-wire connection for a simple plug-in install
• Built to handle constant vibration and heat cycling

Fits These Machines

• for Sea-Doo Speedster 650, 1994-1995

On-The-Job Use

• Routine cooling system maintenance
• Replacing a failed or inaccurate temperature sender
• Restoring a working dash temperature gauge
• Preventive service before the boating season

Specs At A Glance

Good To Know

Q: How do I know the sensor has failed? A: A dead or erratic gauge reading, or a temperature warning that trips when the engine is not actually hot, usually points to a failed sender. Swapping it is the quickest way to confirm the gauge circuit.

Q: Do I need sealant on the threads? A: Use a thread sealant rated for coolant if the factory fitting calls for it, and avoid over-tightening the sensor body. Check for seepage after the first run.

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