AC Delco 41-993 Spark Plug

AC Delco 41-993 Spark Plug

Maintain peak engine performance with the AC Delco 41-993 Spark Plug, a premium OEM-quality ignition component designed for demanding marine applications. Engineered to deliver reliable spark, efficient combustion, and consistent power output, this spark plug helps ensure smooth starts, responsive acceleration, and dependable operation throughout the boating season.

Marine engines operate under heavy loads and in challenging environments where moisture, heat, and extended run times can accelerate wear on ignition components. Replacing spark plugs at recommended service intervals helps improve fuel efficiency, reduce misfires, maintain idle quality, and support overall engine reliability.

The AC Delco 41-993 spark plug is manufactured to exact specifications for long service life and dependable performance in GM-based marine engines. Whether you're performing annual maintenance or a complete tune-up, this spark plug helps restore factory-level ignition performance.

Common Engine Applications

The AC Delco 41-993 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
• Volvo Penta 5.7Gi
• Volvo Penta 8.1Gi

Common Inboard Boat Fitments

These engines are frequently found in a variety of popular inboard towboats, ski boats, and wake 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 G21

Additional applications may include Centurion, Tige, Supreme, Calabria, and other inboard boats equipped with compatible GM-based marine engines.

Features

• Genuine AC Delco OEM-quality spark plug
• Designed for marine ignition system applications
• Promotes efficient fuel combustion and consistent power delivery
• Helps improve starting reliability and throttle response
• Resistant to fouling in demanding operating conditions
• Ideal for preventative maintenance and tune-ups
• Built for long service life in marine environments

Why Replace Spark Plugs?

Worn spark plugs can lead to poor fuel economy, rough running conditions, hard starting, and reduced engine performance. Replacing them regularly helps maintain efficient combustion and keeps your engine operating at its full potential.

Whether you're maintaining a Supra, Moomba, MasterCraft, Malibu, Nautique, or another inboard boat, the AC Delco 41-993 Spark Plug delivers the dependable ignition performance and reliability needed for a successful day on the water.