WhichPartFits.com

Spark Plug

Champion RCJ7Y

11 compatible models

The Champion RCJ7Y is an aftermarket spark plug compatible with 11 models across 2 brands. It is a direct cross-reference for OEM part numbers 537254402, 952030150. Compatible equipment includes Husqvarna 323L, Husqvarna 435, Husqvarna 440, Husqvarna 445, Husqvarna 450, and 6 more.

See a wrong fitment? Report a correction.
Verify before ordering: Fitment can vary by serial number, production date, region, and sub-model. Match the OEM number and physical dimensions before ordering.

Amazon Buying Check

Use the Amazon listing to compare kit contents, seller details, shipping, and OEM compatibility notes before ordering.

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Some links may be affiliate links. Match the OEM number, dimensions, and model variant before buying.

Compatible Models

BrandModelOEM #ConfidenceSourceReviewedEvidence
Husqvarna323L537254402MediumAftermarket catalog2026-05-200.5mm gapTrimmer
Husqvarna435537254402MediumAftermarket catalog2026-05-200.5mm gapChainsaw
Husqvarna440537254402MediumAftermarket catalog2026-05-200.5mm gapChainsaw
Husqvarna445537254402MediumAftermarket catalog2026-05-200.5mm gapChainsaw
Husqvarna450537254402MediumAftermarket catalog2026-05-200.5mm gapChainsaw
Husqvarna455 Rancher537254402MediumAftermarket catalog2026-05-210.5mm gapChainsaw
Husqvarna460 Rancher537254402MediumAftermarket catalog2026-05-200.5mm gapChainsaw
Poulan ProP3314952030150MediumAftermarket catalog2026-05-20Champion RCJ-7Y; 0.025" gapChainsaw
Poulan ProP3816952030150MediumAftermarket catalog2026-05-20Champion RCJ-7Y; 0.025" gapChainsaw
Poulan ProPP4218A952030150MediumAftermarket catalog2026-05-20Champion RCJ-7Y; 0.025" gapChainsaw
Poulan ProPP4620AV952030150MediumAftermarket catalog2026-05-20Champion RCJ-7Y; 0.025" gapChainsaw

What this part is

Champion RCJ7Y is listed here as a spark plug replacement option. Use this page as a fitment cross-reference, then confirm the removed part, model plate, and seller listing details before buying.

OEM numbers it replaces

537254402, 952030150

Alternate spellings

RCJ7Y is the normalized part number used on this site.

Known exclusions

  • No specific exclusion is listed in the current data. Still verify serial range, production variant, and removed-part details before ordering.

Dimensions and specs

  • 0.5mm gap
  • Champion RCJ-7Y; 0.025" gap

Symptoms that suggest replacement

  • Won't start
  • Hard hot restart
  • Rough idle
  • Fuel-fouled or carbon-heavy plug

How to verify before buying

  • Confirm your equipment is one of the compatible models listed above.
  • Match the OEM number, stamped part number, or physical spec against the removed part.
  • Read the model-specific evidence, confidence, source, reviewed date, dimensions, notes, and exclusions before opening an Amazon listing.

Common wrong-fit mistakes

  • Ordering from a broad model-family listing without checking the exact equipment model.
  • Ignoring the old OEM number, stamped part number, or physical dimensions.
  • Matching the plug number but missing the required gap, terminal style, or thread reach.

Related model and part pages

Husqvarna 323L spark plugHusqvarna 435 spark plugHusqvarna 440 spark plugHusqvarna 445 spark plugHusqvarna 450 spark plugHusqvarna 455 Rancher spark plugHusqvarna 460 Rancher spark plugPoulan Pro P3314 spark plugChampion RC12YC spark plugNGK BPR5ES spark plugChampion CJ8Y spark plugNGK BPM8Y spark plugNGK BPMR8Y spark plugChampion RS12YC spark plug

Amazon buying cautions

  • Check that the Amazon listing includes the exact part number or verified cross-reference shown here.
  • Compare kit contents, gaskets, fuel lines, bulbs, plugs, filters, and dimensions against the removed part before checkout.
  • A listing title can mention the right model and still include the wrong revision, accessory, or generic substitute.