Autolite 275 Spark Plug

Reliable Ignition with Autolite Copper Non-Resistor Spark Plug 275

The Autolite Copper Non-Resistor Spark Plug 275 delivers consistent ignition performance for a range of vehicles including Buick, Jeep, and Mercedes-Benz models. Designed with durable materials and precise specifications, this spark plug supports efficient engine operation and reliable starts.

• Copper center electrode core for enhanced conductivity
• Tapered ground electrode tip made of nickel for durability
• Flat seat type ensuring proper sealing
• Short ceramic insulator for heat resistance
• Removable nut electrical terminal for easy installation
• Pre-gap size of 0.025 inches (0.60 mm) optimized for ignition
• Standard center electrode design with a single ground electrode
• Thread diameter of 14.0 mm and reach of 0.500 inches (13.0 mm)
• Hex size 13/16" (21 mm) for compatibility with common tools

About the Copper Non-Resistor Spark Plug Line

The Autolite Copper Non-Resistor Spark Plug line focuses on delivering straightforward, reliable spark plugs without resistor components. This design supports direct electrical conduction through the copper core, which is known for excellent conductivity. The absence of a resistor allows for consistent spark energy, making it suitable for older and classic vehicles such as the Buick LeSabre and Jeep Wagoneer.

Technical Details and Compatibility

This spark plug features a copper core center electrode with a nickel tip, paired with a tapered nickel ground electrode tip. The flat seat design ensures a secure fit and proper sealing in the combustion chamber. The short ceramic insulator provides effective heat dissipation and electrical insulation. The removable nut terminal type facilitates straightforward electrical connections during installation.

The Autolite 275 spark plug is compatible with various makes and models, including Buick 300D, 300SE, and Skylark; Jeep Wagoneer; Land Rover Range Rover; Mercedes-Benz 300SEL; Oldsmobile Cutlass and Tempest; Pontiac 500; and Fiat models. This fitment ensures that the spark plug meets the specific ignition requirements of these vehicles.

Common Applications and Problem Solving

• Restores consistent ignition in Buick 300D and 300SE engines
• Improves starting reliability for Jeep Wagoneer and Land Rover Range Rover
• Addresses misfires and rough idling in Mercedes-Benz 300SEL
• Supports efficient combustion in Oldsmobile Cutlass and Pontiac 500
• Helps maintain optimal engine performance in Fiat and Buick Skylark models

Installation Notes and Tips

• Verify the correct spark plug gap of 0.025 inches (0.60 mm) before installation
• Use a 13/16" (21 mm) socket wrench for proper torque application
• Ensure the flat seat is clean and free of debris for a proper seal
• Check the removable nut terminal for secure electrical connection
• Follow vehicle manufacturer torque 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 275 undergoes rigorous quality control to ensure consistent ignition and fitment. While specific warranty details are not provided, Autolite products typically come with manufacturer-backed reliability consistent with OEM requirements.