Champion 525 Spark Plug

Description

The Champion 525 Spark Plug is designed to provide dependable ignition performance in early automotive engines, stationary power equipment, and industrial machinery. Built with Champion’s engineering expertise from Federal-Mogul, this plug is engineered to withstand high-temperature and high-load operating conditions while maintaining consistent spark delivery.

Manufactured with durable nickel electrode materials and a tapered seat design, the Champion 525 is suitable for engines requiring a pipe-thread spark plug configuration. Its non-resistor construction supports traditional ignition systems commonly found in vintage engines and early industrial equipment. The removable terminal nut and factory pre-gap provide straightforward installation and compatibility with a wide range of ignition setups.

Designed for high-compression and aggressive operating environments, the Champion 525 also supports alternative fuel applications and engines focused on efficient combustion and reduced emissions.

Features

• Designed for high-compression and aggressive service environments

• Compatible with alternative fuel (gas) engine applications

• Supports improved combustion and CO₂ reduction goals

• Manufactured for superior performance and long-lasting durability

• Nickel center electrode for dependable ignition performance

• Nickel ground electrode with J-gap design

• Pre-gapped at 0.030 in (0.762 mm) for installation convenience

• Tapered seat with pipe thread configuration

• Non-resistor construction for traditional ignition systems

• Removable terminal nut for flexible ignition wire connections

Specifications

• Part Description: Spark Plug

• Center Electrode Tip Material: Nickel

• Center Electrode Design: Standard

• Ground Electrode Quantity: 1

• Ground Electrode Tip Design: J Gap

• Ground Electrode Tip Material: Nickel

• Ground Electrode Core Material: Nickel

• Pre-Gap Size: 0.030 in / 0.762 mm

• Hex Size: 0.938 in / 23.830 mm

• Seat Type: Tapered

• Reach: 1 in

• Thread Diameter: 0.50 Pipe Thread / 21 mm

• Resistor Type: No

• Electrical Terminal Type: Removable Nut

• Hex Type: Hex

• Skirt: Yes

• Classification: Champion Industrial Plugs

• Grade Type: Standard Replacement

• Subject to Prop 65: No

Fitment

Compatible with a variety of early automotive, industrial, and stationary engine applications, including:

Automotive Applications

• Ford Model T (1908–1927) – 2.9L L4 177 cid

• Ford Model TT (1909–1927) – 2.9L L4 177 cid

Additional Vehicle Applications

• Reo 25 HP (1911)

• Reo 30 HP (1911)

• Reo 35 HP (1911)

• Reo Model M (1916–1918)

• Reo Model T-6 (1920–1926)

• Reo The Fifth (1912–1919)

• Willys Overland Light Four (1920–1922)

• Willys Overland Model 65 (1914–1915)

• Willys Overland Model 69 (1913)

• Willys Overland Model 75 (1916–1917)

• Willys Overland Model 79 (1914)

• Willys Overland Model 83 (1916–1918)

• Willys Overland Model 83-B (1916)

• Willys Overland Model 83B (1917–1919)

• Willys Overland Model 90 (1917–1919)

• Willys Overland Model 90B (1918)

• Willys Overland Model 91CE (1925–1926)

• Willys Overland Series 91CE (1923–1924)

Industrial and Equipment Applications

Compatible with various engines and equipment from manufacturers such as:

• Caterpillar

• Cushman

• Fuller & Johnson

• Maytag Multi-Motor Washer

• National Carbon

• Smithwell

• Fraser

• Standard engines

• Coldwell

• Vaughn

• Led-O-Lite

• Phelps

• Novo early engines

• Beeman equipment

This spark plug may also be used in multiple stationary engines and equipment models where compatible specifications are required.

(Always verify engine specifications and manufacturer recommendations before installation.)