Autolite 5144 Spark Plug

Reliable Ignition with Autolite Copper Resistor Spark Plug 5144

The Autolite Copper Resistor Spark Plug 5144 is engineered to deliver consistent ignition performance for a range of Ford, Mazda, and Mercury vehicles. Designed with durable materials and precise specifications, this spark plug supports efficient combustion and engine reliability.

• Resistance: 4000 ohms for effective electrical noise suppression
• Center electrode made of copper core with nickel tip for optimal conductivity and durability
• Tapered ground electrode tip and seat for precise spark delivery
• Extra-long ceramic insulator for enhanced heat dissipation
• Pre-gap size of 0.054 inches (1.40 mm) for proper spark gap
• Stud-type electrical terminal for secure connection
• Hex size 5/8 inch (16 mm) for standard installation tools
• Thread diameter of 14.0 mm and reach of 0.809 inches (20.5 mm) to fit specified engines

About the Autolite Copper Resistor Spark Plug Line

The Copper Resistor Spark Plug line from Autolite is designed to reduce radio frequency interference while maintaining reliable ignition performance. Featuring a resistor type design with a 4000 ohm resistance, these spark plugs help minimize electrical noise that can affect vehicle electronics. The copper core center electrode enhances conductivity, while the nickel tip and ground electrode provide durability under normal operating conditions.

Technical Details and Compatibility

This spark plug features a standard center electrode design with a copper core and nickel tip, paired with a single tapered ground electrode made of nickel. The extra-long ceramic insulator improves heat management, helping to maintain stable combustion temperatures. The tapered seat and precise pre-gap size ensure consistent spark delivery. The Autolite 5144 spark plug is compatible with various Ford, Mazda, and Mercury models including Ford F-150, E-150 Econoline, Ranger, Mazda B4000, and Mercury Lynx among others.

Common Applications and Problem Solving

• Restores proper ignition timing and spark consistency in Ford F-150 and Mazda B4000 engines
• Reduces engine misfires and rough idling in Mercury Lynx and Ford E-150 Econoline
• Helps prevent radio frequency interference affecting vehicle electronics
• Improves fuel efficiency by ensuring complete combustion
• Addresses spark plug wear and electrode erosion in older ignition systems

Installation Notes and Tips

• Verify correct spark plug gap of 0.054 inches (1.40 mm) before installation
• Use a 5/8 inch (16 mm) spark plug socket for proper torque application
• Ensure threads are clean and apply anti-seize compound if recommended by vehicle manufacturer
• Torque spark plug to vehicle specifications to avoid damage to tapered seat
• Check for proper seating and electrical connection on stud-type terminal

Quality Assurance and Warranty

Autolite Copper Resistor Spark Plug 5144 is manufactured to meet OEM specifications for fit, form, and function. The use of high-quality copper and nickel materials along with a ceramic insulator ensures durability and reliable performance. While specific warranty details are subject to the retailer or distributor, Autolite products typically come with a limited warranty against manufacturing defects.