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Champion Agricultural Spark Plug 502
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Champion Agricultural Spark Plug 502

CHAMPION
ELE1989
In stock
$7.81 $6.99
Description The Champion 502 Spark Plug (D21) is engineered for industrial, agricultural, and vintage engine applications...
$6.99
Champion Agricultural Spark Plug 502
Description

Description

The Champion 502 Spark Plug (D21) is engineered for industrial, agricultural, and vintage engine applications operating in high-compression and heavy-load environments. Built with durable nickel electrodes and rugged construction, this spark plug is designed to withstand the demanding conditions often found in agricultural machinery, marine engines, and early automotive engines.

Champion industrial and agricultural spark plugs benefit from Federal-Mogul global engineering, incorporating durable materials and designs intended for long-lasting performance in harsh environments. The D21 spark plug provides consistent ignition performance, helping maintain efficient combustion in engines that operate under high temperature and load conditions.

With an 18 mm thread diameter, 0.5 in reach, and flat seat configuration, the Champion 502 is commonly used in vintage vehicles, industrial equipment, and select marine engines.

Features

  • Designed for high compression and aggressive operating environments

  • Durable nickel electrode construction

  • Engineered for industrial, agricultural, and vintage engine applications

  • Manufactured for long-lasting durability

  • Backed by Federal-Mogul global engineering

  • Provides reliable ignition performance under heavy load conditions

Specifications

Brand: Champion
Part Number: 502
Plug Type: D21
Classification: Champion Agricultural Plugs
Grade Type: Standard Replacement
Part Description: Spark Plug

Electrode Specifications

  • Center Electrode Tip Material: Nickel

  • Center Electrode Design: Standard

  • Ground Electrode Quantity: 1

  • Ground Electrode Core Material: Nickel

  • Ground Electrode Tip Material: Nickel

Dimensions

  • Thread Diameter: 18.000 mm / 0.709 in

  • Reach: 0.5 in

  • Seat Type: Flat

  • Hex Size: 0.875 in / 22.230 mm

Performance

  • Manufacturer Heat Range: 21

  • Pre-Gap Size: 0.025 in / 0.64 mm

  • Resistor Type: No

Additional Details

  • Electrical Terminal Type: Removable Nut

  • Hex Type: Hex

  • Subject to Prop 65: No

Applications

The Champion 502 (D21) spark plug is commonly used in vintage automotive engines, agricultural equipment, and marine engines, including select models such as:

Vintage Automotive

  • Buick Series 40 (1930)

  • Buick Series 50 (1930)

  • Buick Series 60 (1930)

  • Hudson Model O (1927–1928)

  • Hudson Model S (1927–1928)

  • Hudson Super Six (1922–1926)

  • Nash Series 660 (1931)

  • Nash Series 870 (1931)

  • Nash Series 960 (1932)

  • Nash Series 970 (1932)

  • Pontiac Model 401 (1931)

  • Pontiac Model 6-30 B (1930)

Marine / Industrial Engines

  • British Seagull outboard engines (Forty, Forty Plus, Century series)

  • Palmer-Greenwich PW27 engines

  • British Anzani Super-Single engines

Always confirm compatibility by engine type, model, and specifications before installation.

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Shipping

Order Processing
All orders are processed and shipped within 24 hours of purchase (excluding weekends and holidays).
Orders placed after 3:00 PM EST may ship the following business day.

Shipping Methods
Customers select their preferred shipping method and speed at checkout.
Shipping times are determined by the carrier and cannot be guaranteed by us.
Tracking information will be provided once your order has shipped.

Shipping Coverage
If your package arrives damaged, please notify the delivery driver immediately and contact the shipping carrier to file a claim.
You must report any missing or damaged items within 14 days of delivery.
After this time, we cannot be held responsible for lost or damaged items.

Returns

Return Window
You have 30 days from the date of delivery to request a return.
After 30 days, we are unable to accept returns, exchanges, or refund requests.

Eligibility
Items must be returned in their original condition—unused, unwashed, and with all tags and packaging intact.
Certain products may not be eligible for return (e.g., special-order items, customized products, or perishable goods).
Items that have been altered, installed, or modified cannot be returned.

Return Process
Contact our Customer Support team to request a Return Authorization (RMA) before sending items back.
Once your return is approved, you’ll receive instructions on where to send the product.
Customers are responsible for return shipping costs unless the item was defective or incorrect.

Refunds
Refunds are issued to the original payment method once the returned item has been received and inspected.
Please allow 5–10 business days for the refund to appear on your account.
In some cases, a restocking fee may apply (if applicable, this will be disclosed during your return authorization).

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