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The Champion QL77JC4 spark plug is the equivalent of the NGK BR8ES. However, it is always essential to verify specific compatibility with your engine's manual to avoid problems.
You can consult our online conversion charts, easily accessible on our website, or contact our customer service directly. We will be happy to assist you in finding the correct spark plug for your Evinrude, Johnson, or OMC marine engine.
Using an incorrect spark plug can cause significant damage to the engine, including excessive overheating, uncontrolled detonation, and premature wear of internal components. It is always advisable to use genuine or high-quality equivalent replacement parts, carefully verifying compatibility.
The frequency of spark plugs replacement varies depending on the engine model, operating conditions, and type of boating. In general, it is recommended to replace the spark plugs every 100-200 hours of boating or at least once a year, even if that hour limit is not reached.
Although other brands of spark plugs exist, we recommend using Champion or NGK spark plugs, as they are specifically designed and tested for Evinrude, Johnson, and OMC marine engines. Using incompatible brands may compromise engine performance and durability.
Signs of worn spark plugs include hard starts, rough idling, power loss during acceleration, and increased fuel consumption. A visual inspection may reveal worn electrodes, fouling, or damage to the insulator.
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