Part Number: 4719
Denso 4719 Iridium Power Spark Plug
Upgrade your ignition system with the Denso 4719 Iridium Power Spark Plug, a premium-performance spark plug engineered for reliable combustion, improved throttle response, and extended service life. Built with Denso's advanced Iridium Power technology, this spark plug features an ultra-fine iridium center electrode that delivers a powerful, consistent spark while requiring less firing voltage than conventional designs.
In marine applications, ignition components are subjected to constant heat, vibration, and heavy engine loads. The Denso 4719 is designed to thrive in these demanding conditions, helping maintain smooth starts, efficient fuel burn, crisp acceleration, and dependable power delivery throughout the boating season.
Whether you're performing routine maintenance or seeking maximum ignition performance, this iridium spark plug offers the durability and efficiency serious boat owners demand.
Common Engine Applications
The Denso 4719 Iridium Power Spark Plug is commonly used in select GM-based marine engines, including:
- Indmar Monsoon 340
- Indmar Assault 325
- Indmar 5.7L MPI
- Indmar 6.0L MPI
- PCM Excalibur 5.7L
- PCM ZR409
- Ilmor MV8 5.7L
- Ilmor MV8 6.0L
- MerCruiser 350 MAG MPI
- MerCruiser MX 6.2 MPI
- Crusader 5.7L MPI
- Volvo Penta 5.7Gi
- Volvo Penta 8.1Gi
Common Boat Fitments
These engines are frequently found in a variety of popular inboard wake, surf, and ski boats, including:
Supra
- Supra Launch 21V
- Supra Launch 22SSV
- Supra Sunsport 22V
- Supra SA
- Supra SL
Moomba
- Moomba Mobius LSV
- Moomba Mobius XLV
- Moomba Mojo
- Moomba Craz
- Moomba Kaiyen
MasterCraft
- MasterCraft X-2
- MasterCraft X-15
- MasterCraft X-Star
- MasterCraft X-25
- MasterCraft ProStar
Malibu
- Malibu Wakesetter VLX
- Malibu Wakesetter 23 LSV
- Malibu Response TXi
- Malibu Sunsetter LXi
Nautique
- Super Air Nautique 210
- Super Air Nautique 230
- Ski Nautique 200
- Nautique 216
Centurion
- Centurion Elite V
- Centurion Avalanche
- Centurion Ri217
- Centurion Enzo SV230
Features
- Genuine Denso 4719 Iridium Power spark plug
- Ultra-fine iridium center electrode design
- Delivers a strong, consistent spark
- Helps improve throttle response and fuel efficiency
- Supports smooth idle and reliable starting
- Long-lasting performance compared to standard spark plugs
- Designed for demanding marine operating conditions
Benefits of Denso Iridium Power Technology
The fine-wire iridium electrode produces a concentrated spark that improves ignition efficiency and combustion quality. This advanced design helps reduce electrode wear, maintain performance over longer service intervals, and deliver the reliable operation needed for high-performance marine engines.
For owners of Supra, Moomba, MasterCraft, Malibu, Nautique, and Centurion boats equipped with GM-based marine engines, the Denso 4719 Iridium Power Spark Plug provides premium ignition performance and long-term reliability both on and off the water.