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

Starter Solenoid for Yamaha 242 S

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

Overview

This starter solenoid acts as the high-current switch that sends battery power to the starter motor on Yamaha 242 S 1800 watercraft. A healthy starter solenoid delivers quick, consistent cranking every time the key turns. It suits Yamaha 242 S owners replacing a worn or corroded relay in the starting circuit.

Built For Performance

• Direct replacement for OEM part number 1B7-81940-00-00
• Rated for the current load of the 1800cc marine starter motor
• Sealed body shields internal contacts from moisture and salt spray
• Copper contact points support clean, repeatable switching
• Factory-style mounting holes allow straightforward bolt-on installation

Fits These Machines

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

On-The-Job Use

• Replacing a solenoid that clicks without cranking the engine
• Seasonal tune-ups on the starting and charging circuit
• Restoring dependable starts after winter storage
• Servicing the ignition circuit on the water or at the dock

Specs At A Glance

Good To Know

Q: What are the signs of a failing starter solenoid? A: A loud click with no engine crank, intermittent starting, or a solenoid that stays engaged are common symptoms. Testing voltage at the terminals helps confirm the diagnosis.

Q: Will this fit my 2020 Yamaha 242 S 1800? A: It is designed to match the 1B7-81940-00-00 reference used on that model. Check 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.