NGK C7HSA spark plug for 4-stroke engines. The spark from the plug ignites the fuel mixture in the engine cylinder (4-stroke).
Replace it if starting is difficult, if there are misfires and carbon deposits on the electrodes. Choose by thread and heat range. Before installing, check the electrode gap and compare it with the engine manufacturer's recommendation. Thread the spark plug in by hand until it stops, then tighten it with the wrench without excessive force so as not to strip the thread.
