1B7-81940-00-00 Starter Solenoid for Yamaha 242 X E-Series 1800 2016-2020

Starter Solenoid for Yamaha

This starter solenoid is an electrical relay that delivers the high-current burst needed to crank the engine on Yamaha 242 X E-Series 1800 boats, cross-referencing OEM part 1B7-81940-00-00.

Overview

This starter solenoid serves as the heavy-duty switch between the battery and the starter motor on Yamaha 242 X E-Series 1800 watercraft. When the start circuit is engaged, the starter solenoid closes and sends full battery current to spin the starter. It is built for boat owners replacing a failed or weak solenoid on their Yamaha 1800 series engine.

Built For Performance

• Direct cross-reference to OEM part 1B7-81940-00-00 for confident replacement
• Heavy-gauge internal contacts handle the high inrush current of marine starter motors
• Sealed housing resists moisture, salt spray, and engine bay humidity
• Compact footprint matches the factory mounting location on Yamaha 1800 engines
• Corrosion-resistant terminals for reliable long-term contact
• Built to withstand repeated cranking cycles on the water

Fits These Machines

• for Yamaha 242 X E-Series 1800, 2016-2020

On-The-Job Use

• Replacing a solenoid that clicks but will not crank the engine
• Restoring reliable starting on 242 X E-Series boats
• Routine electrical maintenance on Yamaha 1800 series powerplants
• Fixing intermittent starting caused by worn solenoid contacts

Specs At A Glance

Good To Know

Q: How do I know if my solenoid needs replacing? A: A single loud click with no engine crank, or intermittent starting that worsens over time, usually points to burned solenoid contacts. Testing for voltage at the starter terminal while cranking confirms the diagnosis.

Q: Can I install this myself? A: Yes, replacement is typically a straightforward job of disconnecting the battery, swapping the solenoid, and reattaching the cables. Label your wiring before removal so reconnection matches the original layout.

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