Autolite 373 Spark Plug

Overview of Autolite Copper Non-Resistor Spark Plug 373

The Autolite Copper Non-Resistor Spark Plug 373 is engineered for reliable ignition performance in a variety of vehicles. Designed with a copper core and nickel electrodes, this spark plug supports efficient combustion and consistent engine operation.

• Copper center electrode core for enhanced conductivity
• Nickel ground and center electrode tips for durability
• Tapered ground electrode tip design for optimal spark exposure
• Flat seat type with 0.750 inch reach and 18.0 mm thread diameter
• Short ceramic insulator for heat resistance and electrical insulation
• Removable nut electrical terminal type for easy installation
• Non-resistor design to maintain strong spark energy
• Pre-gap size of 0.025 inches (0.60 mm) for precise ignition timing
• Hex size options of 13/16 inch (21 mm) for standard wrench compatibility

Detailed Product Description

The Autolite Copper Non-Resistor Spark Plug 373 features a copper core center electrode that improves electrical conductivity, promoting efficient spark generation. Both the center and ground electrode tips are made of nickel, providing resistance to wear and corrosion. The tapered ground electrode tip design enhances spark exposure to the combustion chamber, supporting better ignition. This spark plug has a flat seat type and a reach of 0.750 inches (19.5 mm), suitable for many automotive engines requiring this specification. The short ceramic insulator offers excellent heat resistance and electrical insulation, while the removable nut terminal type simplifies installation and maintenance. With a non-resistor design, this spark plug delivers strong spark energy without interference, making it compatible with ignition systems that do not require resistor plugs.

About the Copper Non-Resistor Spark Plug Product Line

The Autolite Copper Non-Resistor Spark Plug line focuses on delivering reliable ignition components with copper core electrodes for improved conductivity and nickel tips for durability. This product line is designed for applications where non-resistor plugs are preferred, providing consistent spark performance without resistor-related voltage drop. The 373 part number is a representative model within this line, offering specifications that meet the demands of various vehicle makes and models requiring a flat seat, 0.750 inch reach spark plug.

Common Applications and Issues Addressed

• Replacement for worn or fouled spark plugs in compatible vehicles
• Improves engine starting and reduces misfires
• Helps restore fuel efficiency by ensuring proper combustion
• Addresses rough idling caused by inconsistent spark delivery
• Suitable for ignition systems that do not require resistor spark plugs

Installation Notes and Tips

• Verify compatibility with your vehicle’s make and model before installation
• Check and adjust the pre-gap to 0.025 inches (0.60 mm) if necessary
• Use a 13/16 inch (21 mm) socket wrench for proper tightening
• Apply anti-seize compound on threads if recommended by the vehicle manufacturer
• Torque spark plug to manufacturer specifications to avoid damage

Quality Assurance and Warranty

Autolite spark plugs are manufactured to meet industry standards for durability and performance. The Copper Non-Resistor Spark Plug 373 undergoes rigorous quality control to ensure consistent ignition reliability. Warranty coverage details should be confirmed with the vehicle manufacturer or authorized Autolite distributor.