CHAMPION RD16 SPARK PLUG

Function and technical context

Champion's RD16 spark plug is the element responsible for generating the spark that initiates combustion inside the cylinder in four-stroke petrol marine engines. It works directly in the ignition system, acting in sync with the coil and distributor to ignite the air-fuel mixture at the exact moment of the engine cycle. A precisely calibrated electrode ensures a constant spark jump even under the high compression pressure characteristic of marine engines, both in fresh water and in salt water environments with high humidity and salinity. If the spark plug deteriorates, the engine may experience ignition failures, progressive loss of power and increased fuel consumption, compromising the safety and performance of the boat. Its construction resistant to corrosion and the build-up of carbon deposits makes it especially suitable for long duty cycles in nautical applications.

When to replace this part?

The most common symptoms of a worn or bad spark plug include difficulty starting when cold, jerks or irregularities at idle, noticeable loss of acceleration and, in more advanced cases, engine crashes or unexpected stops while navigating. In marine engines, it is recommended to check and replace the spark plugs every 100 hours of operation or at the beginning of each nautical season, since marine humidity and thermal variations accelerate the wear of the electrode and the ceramic insulator. Changing the spark plugs preventively during each seasonal maintenance is a simple and economical measure that prevents breakdowns at sea and guarantees efficient ignition throughout the sailing season.

Marine Engine Compatibility

Equivalent manufacturer part numbers