Autolite 46 Spark Plug

Reliable Ignition with Autolite Copper Resistor Spark Plug 46

The Autolite Copper Resistor Spark Plug part number 46 is engineered to provide consistent ignition performance for select Ford and Mercury vehicles. Designed with durable materials and precise specifications, this spark plug supports efficient combustion and engine operation.

• Resistor value of 4000 ohms to reduce electrical interference
• Tapered ground electrode tip made of nickel for durability
• Copper center electrode core for improved conductivity
• Stud-type electrical terminal for secure connection
• Ceramic mid-projection insulator for reliable insulation
• Pre-gap size of 0.044 inches (1.10 mm) optimized for ignition
• Standard center electrode design with a single ground electrode
• Tapered seat type with 13/16" (21 mm) hex size for installation
• Thread diameter of 18.0 mm and reach of 0.438" (12.0 mm)

About the Autolite Copper Resistor Spark Plug Line

The Copper Resistor Spark Plug line from Autolite combines copper core electrodes with resistor technology to minimize radio frequency interference while maintaining strong spark energy. This balance supports smooth engine operation and reduces ignition system wear. The resistor feature is particularly beneficial for vehicles with sensitive electronic components.

Detailed Product Description

This Autolite spark plug features a copper core center electrode that enhances electrical conductivity, promoting efficient spark generation. The nickel ground electrode with a tapered tip design ensures consistent spark gap and durability under high temperatures. The ceramic mid-projection insulator provides excellent electrical insulation and heat resistance. With a pre-set gap of 0.044 inches (1.10 mm), this spark plug is ready for optimal ignition performance in compatible engines. The stud-type electrical terminal and tapered seat design facilitate secure installation and reliable contact.

Compatible Vehicles and Applications

This spark plug is compatible with a range of Ford and Mercury models, including Bronco, Capri, Colony Park, Cougar, E-100 Econoline, Econoline, F-100, F-250, F-350, Fairmont, LTD, Marquis, Monarch, Montego, Mustang, Thunderbird, Villager, and Zephyr. It is designed to meet the ignition requirements of these vehicles, ensuring proper fit and function.

• Helps resolve misfires and rough idling
• Reduces radio frequency interference in ignition systems
• Improves cold start performance
• Supports consistent engine power and fuel efficiency
• Prevents electrode wear and extends spark plug life

Installation Notes and Tips

Before installation, verify the spark plug gap is set to 0.044 inches (1.10 mm) if adjustment is needed. Use a torque wrench to tighten the spark plug to the manufacturer’s recommended specifications to avoid damage to the tapered seat. Ensure the electrical terminal is securely connected to maintain proper ignition system function. It is advisable to replace spark plugs in sets to maintain balanced engine performance.

Quality Assurance and Warranty

Autolite Copper Resistor Spark Plug part number 46 is manufactured to meet OEM standards for fit, form, and function. The use of high-quality materials such as copper and nickel ensures durability and reliable performance. While specific warranty details are not provided, Autolite products typically adhere to industry quality controls and are backed by the brand’s commitment to automotive standards.