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Champion 561 Spark PlugOE Quality 60-Day Returns
Part #: 561

Champion 561 Spark Plug

Copper Plus
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Copper Plus
Fitment: Harley Davidson, Ford, Graham, Du Pont, Elcar, Gardner, Auburn, Erskine, Graham-Paige, Kissel, Packard, Roamer, Whippet, Chrysler, Durant, Locomobile, Moon, Oakland, Peerless, Plymouth, Pontiac, Buick, Chevrolet, Diana, Hupmobile, Jordan, Star, Case, Jewett, Paige, Stevens-Duryea, Apperson, Chandler, Cole, Davis, Maxwell, Rollin, and Nash, RL, Model 40 A, Model BB, Sedan Delivery, Model 64, Model 67, Model 46, Custom 57 A, Graham, Model 57 A, Model 65, VL, Model G, 1 Ton Pickup, 1/2 Ton Pickup, 3/4 Ton Pickup, Model 18, Model B, Custom 834, Model 57, Prosperity, Special, Special 820, Special 822, Standard, Model 100, Model 86, Model A, Model AA, Model 136, Model 148, Model 150, Model 158, Model 621, DL, Model 125, Model 6-85, Model 8-95, Model 120, Model 75A, Model 95, Model 96, Model 53, Model 140, Model 612, Model 615, Series 6-73, Series 8-126, Series 8-95, Model 726, Model 733, Model 734, Model 740, Model 745, Model 8-88, Model 96A, Model 98A, Model 115, Model 6-80, Model 76, Model 8-90, Model 88, Series 65, Series 66, Series 70, Series 75, Series 80 L Imperial, Model 40, Model 60, Model 66, Model 70, Model M4, Model 75, Model 52, Model 130, Model 48, Model 90, Model 8-80, Model 212, Model 626, Model 633, Model 640, Model 645, Model 6-61, Model 6-81, Model U, Model 6-29 A, Model 6-66, Model 8-77, Second Series Model 76, Standard Six, National, National Truck, Series 52, Series 62, Series 72, Eight, Model E, Model 55, Model M2, Model 6-70, Model 8-78, Model 8-82, Model 8-91, Model 51, Model 8-75, Model 8-85, Model 610, Model 614, Model 619, Model 629, Model 835, Century Series 125, Century Series A, Air Line Eight, Series 8-90, Series 80, Model 8-70, Model 6-60, Single Eight, Single Six, Model 6-91, Model 8-69, Model Q, Model 6-28, Four, Jay-Eye-See, and Model Y
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Champion Copper Plus 561 Spark Plug Overview

The Champion Copper Plus 561 spark plug is engineered for reliable ignition performance in agricultural and light-duty vehicles. Designed with durable nickel electrodes and a precise pre-gap, this spark plug supports consistent engine starts and efficient combustion.

  • Ground and center electrode core made of nickel for durability
  • Pre-gap size of 0.025 inches (0.65 mm) for optimal spark
  • Flat seat type ensuring proper sealing
  • Thread diameter of 0.875 inches (22.225 mm) with 0.625-inch reach
  • Hex size of 0.938 inches (23.83 mm) for standard installation tools
  • Manufacturer heat range rating of 16 suitable for agricultural engines
  • Single ground electrode design
  • Non-resistor type spark plug

Detailed Product Description

The Champion Copper Plus 561 spark plug features nickel ground and center electrode cores, providing a balance of conductivity and wear resistance. The pre-gap is factory set at 0.025 inches (0.65 mm), which supports efficient ignition and combustion stability. Its flat seat design ensures a secure fit and proper sealing in compatible cylinder heads. With a thread diameter of 0.875 inches (22.225 mm) and a reach of 0.625 inches, this spark plug fits a range of agricultural engines requiring the W16Y plug type. The hex size of 0.938 inches (23.83 mm) allows for easy installation using common hand tools. The heat range of 16 is optimized for engines operating under moderate to high temperatures, typical in farming equipment and some light-duty vehicles.

About the Champion Copper Plus Product Line

The Copper Plus line from Champion is designed to provide dependable ignition performance with copper core electrodes that enhance conductivity and heat dissipation. This product line is commonly used in agricultural applications where consistent spark and durability are critical. The Copper Plus 561 spark plug maintains these standards, offering a reliable ignition solution for compatible vehicles and equipment.

Common Applications and Issues Addressed

  • Replacement for worn or fouled spark plugs in agricultural engines
  • Improves engine starting reliability in tractors and farm machinery
  • Helps reduce misfires caused by electrode wear or gap inconsistencies
  • Supports stable combustion to enhance fuel efficiency
  • Addresses ignition issues related to improper spark plug heat range

Installation Notes and Tips

  • Verify compatibility with your vehicle’s make and model before installation
  • Use a torque wrench to tighten the spark plug to manufacturer specifications
  • Check and adjust the spark plug gap if necessary before installation
  • Ensure the flat seat properly contacts the cylinder head for a secure seal
  • Inspect ignition components for wear when replacing spark plugs

Quality Assurance and Warranty

Champion spark plugs, including the Copper Plus 561, are manufactured to meet industry standards for ignition components. While specific warranty details may vary, Champion products typically come with a limited warranty against manufacturing defects. For precise warranty information, consult the product packaging or manufacturer documentation.

BrandChampion
Part Number561
PositionCopper Plus
Center Electrode Tip MaterialNickel
ClassificationChampion Agricultural Plugs
Ground Electrode Core MaterialNickel
Ground Electrode Quantity1
Hex Size0.938
Hex Size23.830
Hex TypeHex
Insulator Height0.08
Manufacturer Heat Range16
Plug TypeW16Y
Pre-Gap Size0.025
Pre-Gap Size0.65
Reach0.625
Resistor TypeNo
Seat TypeFlat
Thread Diameter0.875
Thread Diameter22.225

This part fits 0 vehicles. Search below:

YearMakeModelPositionNotes

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

This part directly replaces or is cross-referenced with the following part numbers:

137BSP34A44B43B53C16CC4C4XC77JA43JAS43JC53W16Y

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.

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