How to identify signs of wear on Marine Spark Plugs to prevent unexpected downtime?

1. Visual inspection
Electrode gap inspection:
Use an appropriate tool (such as a spark plug gap gauge) to measure the gap between the center electrode and the side electrode of the spark plug. If the gap exceeds the manufacturer's recommended specifications, it indicates that the spark plug is worn and needs to be replaced.
Electrode burnout:
Observe whether the spark plug electrode has burnout, such as black deposits, pits or cracks on the electrode surface. These signs indicate that the spark plug has been subjected to excessive heat or pressure during use, causing the electrode material to degrade.
Ceramic insulator damage:
Inspect the ceramic insulator portion of the spark plug for cracks, breakage or discoloration. Damage to the ceramic insulator may cause high-voltage leakage and affect the normal operation of the spark plug.
2. Performance inspection
Starting difficulties:
If the engine has difficulty starting, especially in cold starts or high humidity environments, it may be a sign of reduced spark plug performance.
Power loss:
Spark plug wear can cause engine power loss, slow acceleration or increased fuel consumption. If these phenomena are found, the working condition of the spark plug should be checked.
Misfire phenomenon:
Use a fault diagnostic instrument to check whether the engine has a misfire fault code. Misfire phenomenon is often related to poor performance of the spark plug.
3. Preventive measures
Regular replacement:
Replace the spark plug regularly according to the manufacturer's recommendations and the use of the engine. Generally speaking, the replacement cycle of marine spark plugs may vary depending on the engine type, usage conditions and fuel quality.
Use high-quality fuel:
Use high-quality fuel can reduce carbon deposits and deposits on the spark plugs and extend the service life of the spark plugs.
Keep the engine clean:
Regularly clean the engine intake system, fuel system and ignition system to reduce the impact of impurities and pollutants on the spark plugs.
Avoid long idling:
Long idling will cause the engine temperature to be too low and the fuel to be incompletely burned, thereby increasing the risk of carbon deposits on the spark plugs.
Regular maintenance:
Perform regular maintenance on the engine, including checking the ignition system, fuel system and cooling system, etc., to ensure the normal operation of all engine components.