663861100200
About this part
This page covers the genuine Yamaha part 663861100200 (Solenoid coil assy). It’s an original OEM component designed to match Yamaha’s factory tolerances for correct fit, reliable function, and long service life in marine conditions.
Why choose genuine Yamaha?
Choosing genuine Yamaha OEM helps avoid problems often seen with pattern parts: mis-sized sealing profiles, inconsistent rubber compounds, poor plating, and connectors that don’t lock correctly. On a marine engine, those small differences can become big issues.
Notes for this part
Installation tip: clean terminals, check cable condition, and ensure mounting/earthing points are corrosion-free. Excessive voltage drop from tired cables can mimic relay faults.
Relays/solenoids switch high current circuits like starting. Symptoms of a failing unit can include intermittent cranking, a click with no crank, or heat-related starting issues that come and go.
Warranty
New genuine parts include a 1-year warranty (correct application and installation required).
Ordering tips
Ordering tip: when buying multiple items, it’s worth reviewing the same diagram section for related gaskets and seals so everything arrives together.