Product Overview
Spark Plug 821
Keep your engine running smooth and efficiently with the Champion Spark Plug 821. This reliable spark plug is designed to deliver optimal performance and extended life in various marine engines, ensuring a trouble-free boating experience. Its durable construction and compatibility with popular outboard brands like Evinrude and Johnson make it a smart choice for boaters who value reliability and peak engine performance.
Key Features
- **Champion Quality:** Built by a trusted name in marine ignition systems, offering superior performance and dependability.
- **Versatile Compatibility:** Cross-references with numerous spark plug models, including NGK, Bosch, ACDelco, and more (see reference numbers). Ideal replacement for Evinrude/Johnson (0386941, 0502194, 0509927), and others.
- **Optimal Performance:** Designed for smooth starts, efficient fuel burn, and powerful performance across the RPM range.
- **Extended Lifespan:** Durable construction with a removable terminal for easy maintenance and long service life.
- **14mm Thread Diameter & 12.7mm Thread Reach:** Ensures a secure and proper fit in a wide range of marine engines.
- **Flat Seat Type & 21mm Hex Size:** Easy installation and removal with standard tools.
- **Non-Projected Tip:** Optimized for various combustion chamber designs, promoting efficient fuel burn.
Specifications
Thread diameter14mm
Thread reach12.7mm
Seat typeflat
Hex size21mm
Tip configurationnon projected
ConstructionStandard construction
Terminal typeRemovable
Reference number['0386941: Evinrude/Johnson', '0502194: Evinrude/Johnson', '0509927: Evinrude/Johnson', 'AE091X: Motorcraft', 'AV091X4: Motorcraft', 'B10HS: NGK', 'B9HS: NGK', 'B9HS10: NGK', 'B9HV: NGK', 'L77JC4: Champion Spark Plug', 'M40FFX: ACDelco', 'M41FF: ACDelco', 'W31FS: DENSO', 'W4A: Bosch', 'W4A1: Bosch', 'W4A2: Bosch', 'W4A5: Bosch', 'W4AC: Bosch', 'W4AS: Bosch']
The Captain's Take
After years of navigating challenging waters, I've learned the importance of reliable equipment. That's why I trust the Champion Spark Plug 821 in my vessel. It delivers consistent, powerful ignition, allowing me to focus on the journey, not the engine. It's a small investment that provides big peace of mind.
