Eco Clean 861eco Spark Plug, 0.551 In Thread

The Champion Eco Clean 861ECO spark plug is designed for small engines and outdoor power equipment. This fine-wire spark plug delivers faster, easier, and more consistent starts while reducing emissions and improving fuel economy. The innovative design fights plug fouling—a common problem that causes hard starts and poor performance—and maintains reliable ignition performance over time.

Whether you're replacing a worn spark plug in your lawn and garden equipment or performing routine maintenance, the 861ECO is designed as a direct original equipment (OE) replacement that matches factory specifications. Its focused spark technology and superior electrode design make it an ideal choice for keeping small engines running cleanly and efficiently.

Features and Benefits

• Fine-Wire Center and Side Electrodes: Concentrates spark energy for easier starts under all conditions, reducing startup time and improving reliability.
• Booster Gap Technology: Delivers maximum firing voltage to ensure consistent ignition performance and dependable operation.
• Projected Core Nose Design: Offers peak performance and helps reduce plug fouling to maintain ignition reliability.
• OE Replacement Fit: Direct fit replacement for original equipment specifications in lawn and garden engines and similar small engine applications.
• Cleaner Engine Operation: Reduces emissions and improves fuel economy, making your equipment more environmentally friendly and cost-effective to operate.

Specifications

• Brand: Champion
• Model: 861ECO
• Alternative Model: 5861
• Thread Size: 0.551 in
• Equivalent to: J19LM, RJ19LM, J17LM, RJ17LM