Ignition Coils & Starter Motors

Modern four-stroke outboards rely on precise, high-amplitude electrical currents to ensure complete fuel combustion within each cylinder. Genuine Yamaha ignition coils are engineered and insulated to transform low-voltage battery power into the intense, high-voltage arc required by your spark plugs. Operating in humid, high-salinity marine environments exposes ignition systems to intense stress; these factory components are hermetically sealed in specialized epoxy compounds to completely lock out moisture, salt-air tracking, and thermal breakdown.

By maintaining exact internal winding resistances, Yamaha coils prevent the micro-misfires, rough idling, and upper-RPM power loss that often plague generic electrical parts. Many variants feature integrated spark plug boot assemblies with internal resistor cores designed to minimize radio frequency interference (RFI) with your onboard fish finders and GPS navigation screens. Replacing a weak or cracked coil restores instant throttle response, optimizes fuel efficiency, and ensures clean firing under heavy loads.

Variants Available:

• Direct-to-Plug Coil-on-Plug (COP) Packs: Modern, low-profile assemblies that snap directly onto the spark plug terminal, standard on modern EFI blocks like the F90, F115, and V6 Offshore lines.

• Traditional Bracket-Mount Coils: External ignition coils utilizing high-tension lead wires, engineered for legacy carbureted models and portable twin-cylinder series.

Key Features:

• High-dielectric epoxy encapsulation protects internal copper windings from moisture and vibration

• Calibrated primary and secondary winding resistances to match factory ECU ignition timing profiles

• Built-in premium rubber spark plug boots with integrated weather-tight seals

• RFI suppression technology to prevent electronic screen static on helm displays

Ideal For: Resolving rough idle or intermittent cylinder drop, correcting mid-range engine hesitation, replacing heat-cracked coil bodies, and restoring top-end speed.