NGK DCPR8E SPARK PLUG - 4339

NGK DCPR8E Spark Plug – 4339 The NGK DCPR8E Spark Plug, stock number 4339, is a proven ignition replacement for a wide range of Sea-Doo personal watercraft powered by BRP Rotax 4-TEC and ACE engines. Designed for dependable spark delivery in demanding marine conditions, it helps maintain quick starting, smooth idle quality, responsive acceleration, and consistent performance throughout the RPM range. Built with NGK's copper-core electrode technology, the DCPR8E efficiently transfers heat away from the firing tip while maintaining reliable ignition under changing engine loads. Its resistor construction helps suppress electrical interference, an important feature on modern watercraft equipped with electronic engine management, digital gauges, and other onboard systems. Worn or fouled plugs can cause hard starting, hesitation, rough running, misfires, and reduced power. Replacing them as part of routine Sea-Doo maintenance helps keep the engine performing as designed and reduces the chance of ignition-related problems on the water. Spark Plug Specifications Manufacturer: NGK Part Number: DCPR8E NGK Stock Number: 4339 Type: Standard resistor spark plug Heat Range: 8 Thread Diameter: 12 mm Thread Reach: 19 mm Hex Size: 16 mm Electrode Core: Copper Standard Spark Gap: 0.8 mm on many 1503 applications Sold Individually Common BRP Rotax Engine Applications The NGK DCPR8E / 4339 is used in select Sea-Doo engines, including: BRP Rotax 1503 4-TEC Rotax 1503 NA Rotax 1503 NA iTC Rotax 1503 Supercharged Rotax 1503 SCIC Rotax 1503 SCIC iTC Rotax 1503 HO ACE Select Rotax 1630 ACE applications Common Sea-Doo Model Applications Depending on year and engine configuration, the NGK 4339 is found in Sea-Doo models such as: Sea-Doo GTI Sea-Doo GTI 130 Sea-Doo GTI 155 Sea-Doo GTI SE 130 Sea-Doo GTI SE 155 Sea-Doo GTI Limited 155 Sea-Doo GTX Sea-Doo GTX 155 Sea-Doo GTX 215 Sea-Doo GTX Limited Sea-Doo GTX 230 Sea-Doo RXP Sea-Doo RXP 155 Sea-Doo RXP 215 Select RXP-X applications Sea-Doo RXT Sea-Doo RXT 215 Sea-Doo RXT 230 Select RXT-X applications Sea-Doo Wake Sea-Doo Wake 155 Sea-Doo Wake Pro 215 Select Sea-Doo Wake Pro models Sea-Doo FishPro Sea-Doo FishPro Sport 170 Sea-Doo FishPro Trophy 170 Additional applications include select Sea-Doo models equipped with compatible Rotax 1503 and 1630 ACE engine packages. Key Features Genuine NGK DCPR8E spark plug NGK stock number 4339 Proven application for Sea-Doo personal watercraft Compatible with select Rotax 1503 4-TEC and 1630 ACE engines Copper-core electrode provides efficient heat dissipation Resistor construction helps reduce electronic interference Promotes reliable starting and smooth acceleration Helps maintain consistent combustion under varying engine loads Excellent choice for seasonal maintenance and tune-ups Built for Sea-Doo 4-TEC Performance Sea-Doo 4-TEC engines depend on proper spark plug condition to deliver the smooth, responsive performance these watercraft are known for. Heat cycles, fuel deposits, and normal electrode wear eventually reduce ignition efficiency, making regular inspection and replacement an important part of preventative maintenance. For compatible Sea-Doo GTI, GTX, RXP, RXT, Wake, Wake Pro, and FishPro models, the NGK DCPR8E 4339 provides dependable NGK quality and proven marine performance. Fitment Note: Sea-Doo has used several engine families and spark plug specifications within the same model names. Spark gap can also vary by engine application. Always verify NGK DCPR8E / stock #4339 against your Sea-Doo model year, Rotax engine type, and original spark plug specification before ordering or setting the gap.