Description:
The Autolite 5125 Copper Spark Plug is engineered to deliver dependable ignition performance, quick starts, and consistent engine power. Featuring a copper core center electrode, this spark plug improves heat transfer to help maintain proper operating temperatures and resist fouling.
High nickel alloy center and ground electrodes enhance durability and extend spark plug life while maintaining reliable spark delivery. The multi-rib high alumina ceramic insulator improves electrical insulation and heat dissipation, supporting stable performance under demanding engine conditions. A corrosion-resistant nickel-plated shell further protects the spark plug from rust and wear for long-lasting reliability.
Autolite copper spark plugs are designed as dependable replacements for many gasoline engines, helping ensure efficient combustion and smooth engine operation.
Features:
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Copper core center electrode improves heat transfer and fouling resistance
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High nickel alloy center and ground electrodes help extend spark plug life
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Multi-rib ceramic insulator improves electrical insulation and durability
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Nickel-plated shell helps resist corrosion and extend service life
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Designed for quick starts and consistent ignition performance
Product Specifications:
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Part number: 5125
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Brand: Autolite
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Product type: Copper spark plug
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Center electrode core material: Copper
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Center electrode tip material: Nickel
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Ground electrode core material: Nickel
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Ground electrode tip material: Nickel
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Ground electrode configuration: Single
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Ground electrode quantity: 1
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Thread diameter: 14 mm
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Seat type: Tapered
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Reach: 13.716 mm
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Hex size: 21 mm
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Resistor type: Yes
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Resistance: 4000 ohms
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Pre-gap size: 1.1176 mm
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Manufacturer heat range: 8
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Insulator material: Ceramic
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Center electrode design: Standard
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Center electrode projection: Extra-long projection
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Center electrode insulator tip projection: Extra-long
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Electrical terminal type: Non-removable nut
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Washer included: No
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Skirt: No