1B7-81940-00-00 Starter Solenoid for Yamaha 242 S E-Series 1800 2020

Starter Solenoid for Yamaha 242 S E-Series

This starter solenoid is an electrical relay that engages the starter motor on Yamaha 242 S E-Series 1800 boats, carrying the OEM cross-reference 1B7-81940-00-00.

Overview

This starter solenoid serves as the high-current switch that delivers battery power to the starter motor on Yamaha 242 S E-Series 1800 watercraft. A reliable starter solenoid keeps ignition response crisp, so the engine turns over the moment you hit the key. It is built for Yamaha 242 S E-Series owners who want a dependable replacement without hunting down discontinued parts.

Built For Performance

• Direct replacement for OEM part number 1B7-81940-00-00
• Handles the high current draw required by the 1800cc starter motor
• Sealed housing resists moisture and spray common in marine engine bays
• Copper internal contacts deliver consistent switching across repeated starts
• Compact bolt-on footprint matches the factory mounting points

Fits These Machines

• for Yamaha 242 S E-Series 1800 (2020)
• for Yamaha 242 S E-Series 1800 (other model years using 1B7-81940-00-00)

On-The-Job Use

• Routine replacement when the starter clicks but does not crank
• Restoring reliable cold starts at the boat ramp
• Servicing the starting circuit during seasonal maintenance
• Replacing a corroded or heat-cycled solenoid after years on the water

Specs At A Glance

Good To Know

Q: How do I know the solenoid is the problem and not the starter? A: A single loud click with no crank often points to the solenoid, while a completely silent key turn can indicate the starter or battery. Testing voltage at the solenoid terminals confirms which part has failed.

Q: Is this a direct fit for the 2020 Yamaha 242 S E-Series? A: It is built to match the 1B7-81940-00-00 reference used on that model. Confirm your engine serial number against the parts diagram before ordering.

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