NGK CR5HSB SPARK PLUG

Function and technical context

The NGK CR5HSB spark plug is part of the outboard engine's ignition system, being responsible for generating the spark that ignites the fuel and air mixture inside the cylinder. Its correct operation directly determines combustion efficiency, engine performance and fuel consumption. A bad spark plug causes misfires, difficult starts, loss of power and increased consumption, which can lead to internal damage to the engine if not attended to in time. This reference is compatible with Yamaha and Suzuki brand outboard motors, being a common maintenance part in recreational and fishing boats.

When to replace this part?

The most common symptoms that indicate that a spark plug needs to be replaced are: difficult or irregular starting, jerks and misfiring at different revolutions, unstable idle and higher fuel consumption than usual. For outboard engines in regular use, it is recommended to check and replace the spark plugs at each seasonal maintenance or every 100 hours of boating, whichever comes first. Changing spark plugs preventively is one of the most economical interventions in nautical maintenance and prevents unexpected breakdowns at sea.

Equivalent manufacturer part numbers