Champion L78V Marine Spark Plug (sold individually)
Swap out those tired plugs and feel your Yamaha snap to life. The Champion L78V is purpose-built for two-stroke outboards—everything from classic 40 hp triples to punchy 90 hp inline fours—delivering a hot, consistent spark even with premix oil swirling through the cylinders. A copper-cored center electrode pulls heat away fast, while the nickel-alloy ground strap resists the salt-scale that loves to build up after a weekend of trolling. Factory-set at 0.030″, the plug threads straight into your 14 mm head with its crush gasket already installed, sealing tight against combustion leaks.
Why your Yamaha will thank you:
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Copper core + nickel tip for cooler running and longer life in oil-rich two-strokes
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Ribbed, glazed insulator fights flash-over when humidity soars at the dock
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Solid terminal post fits Yamaha coil boots perfectly—no thread-on adapters to vibrate loose
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Electro-galvanized shell shrugs off salt mist and makes removal easy at the 100-hour mark
Spin in a fresh set of L78Vs, bump the choke, and enjoy crisp cold starts, steadier idle, and cleaner throttle jumps the next time you leave the ramp.
WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov.
