Part Number: 603-41101
AC Delco 41-101 Iridium Spark Plug
Keep your marine engine performing at its best with the AC Delco 41-101 Iridium Spark Plug. Designed for modern high-performance marine engines, this premium spark plug delivers exceptional ignition reliability, efficient fuel combustion, and extended service life. The iridium center electrode provides a strong, consistent spark that helps improve throttle response, fuel economy, cold starting performance, and overall engine efficiency.
Unlike conventional spark plugs, the AC Delco 41-101 is engineered to withstand the demanding conditions found in marine applications, including extended high-RPM operation, heavy loads, heat, and moisture. Its durable iridium construction resists wear and helps maintain optimal spark gap over a longer service interval, reducing maintenance requirements while supporting peak engine performance.
Whether you're completing scheduled maintenance or replacing worn ignition components, the AC Delco 41-101 helps restore factory-level reliability and power.
Common Engine Applications
The AC Delco 41-101 spark plug is commonly found in GM Gen V-based marine engines, including:
- Indmar Raptor 6.2L
- Indmar Raptor 6.2L HO
- Indmar Raptor 6.2L Supercharged
- PCM ZZ5 5.3L Direct Injection
- PCM ZZ6 6.0L Direct Injection
- Ilmor 5700 GDI
- Ilmor 6000 GDI
- Ilmor 6200 GDI
- MerCruiser 6.2L MPI
- MerCruiser 8.2 MAG
- Volvo Penta V8-300
- Volvo Penta V8-350
- Volvo Penta V8-380
- Volvo Penta V8-430
Common Boat Fitments
These engines are frequently installed in many of today's premium wake, surf, and ski boats, including:
Supra
- Supra SA
- Supra SL
- Supra SE
- Supra SR
Moomba
- Moomba Mojo
- Moomba Kaiyen
- Moomba Makai
- Moomba Max
- Moomba Craz
MasterCraft
- MasterCraft X22
- MasterCraft X24
- MasterCraft XT21
- MasterCraft XT22
- MasterCraft XT23
- MasterCraft NXT22
- MasterCraft NXT24
Nautique
- Super Air Nautique G21
- Super Air Nautique G23
- Super Air Nautique G25
- Nautique S21
- Nautique S23
- Ski Nautique
Malibu
- Malibu Wakesetter 22 LSV
- Malibu Wakesetter 23 LSV
- Malibu Wakesetter 25 LSV
- Malibu M220
- Malibu M240
Centurion
- Centurion Ri230
- Centurion Ri245
- Centurion Fi23
- Centurion Fi25
Features
- Genuine AC Delco 41-101 iridium spark plug
- Long-life iridium center electrode
- Provides reliable spark under demanding conditions
- Helps improve starting, acceleration, and fuel efficiency
- Designed for modern fuel-injected marine engines
- Excellent resistance to wear and fouling
- OEM-quality fit and performance
Benefits of Iridium Technology
Iridium spark plugs offer superior durability and ignition performance compared to traditional copper or platinum plugs. Their fine-wire electrode design requires less voltage to fire while delivering a more consistent spark, helping maximize engine efficiency and maintain performance over extended service intervals.
For owners of Supra, Moomba, MasterCraft, Nautique, Malibu, Centurion, and other premium inboard boats equipped with modern GM-based marine engines, the AC Delco 41-101 spark plug is a trusted choice for dependable performance and long-lasting reliability.