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1953 International Harvester R121

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  2. Auto Parts
  3. Ignition
  4. Secondary Ignition for 1953 International Harvester R121

Secondary Ignition
for your 1953 International Harvester R121


Your International Harvester R121 ignition system includes two circuits that work together to deliver the spark to the spark plug. The secondary ignition connects the spark plug and ignition coil, while the primary circuit connects the coil and battery. Malfunctions in either circuit can cause problems starting your vehicle, so consider replacement parts from StockWiseAuto.com.


In today's vehicles, you have a choice of either an electronic or distributor-free ignition system. Use caution when testing the secondary circuit; it carries a high-voltage current. When you've determined that your International Harvester R121 needs a new secondary ignition, come to StockWiseAuto.com for the lowest prices in OEM parts.