Keep engines aligned with this genuine OEM flywheel key, part number 506689401, designed for select Husqvarna or Cub Cadet Lawn Mower, String Trimmer, Leaf Blower, Hedge Trimmer, or Chainsaw.
Grid is 1 inch square
  Flywheel Key 506689401
  Flywheel Key 506689401
  Flywheel Key 506689401
Manufacturer Part

Flywheel Key 506689401

Genuine OEM Part # 506689401RC Item # 3288999Alternative Part Number(s)
Manufacturer Part
Keep engines aligned with this genuine OEM flywheel key, part number 506689401, designed for select Husqvarna or Cub Cadet Lawn Mower, String Trimmer, Leaf Blower, Hedge Trimmer, or Chainsaw.
Grid is 1 inch square
  Flywheel Key 506689401
  Flywheel Key 506689401
  Flywheel Key 506689401
$5.86
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Estimated DIY Savings: $299.98
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Keep engines aligned with this genuine OEM flywheel key, part number 506689401, designed for select Husqvarna or Cub Cadet Lawn Mower, String Trimmer, Leaf Blower, Hedge Trimmer, or Chainsaw.
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$5.86
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This part 506689401 is compatible with:

Product Type:
Chainsaw, Hedge Trimmer, Lawn Mower, Leaf Blower, String Trimmer
Brands:
Husqvarna, Cub Cadet

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Flywheel Key Customer Reviews

Common Problems Fixed by the Flywheel Key

Based on customer reports and repair data, this part commonly fixes these issues:

About the Flywheel Key

the flywheel key might have sheared in half. The flywheel key is a small metal piece which fits into the crankshaft and engages with the flywheel. If the lawn mower engine stops suddenly due to hitting a hard object, the flywheel key breaks in half to prevent damage to the engine. If the flywheel key is broken, the lawn mower won't start. To determine if the flywheel key is broken, remove the flywheel from the engine and inspect the flywheel key. If the flywheel key is broken, replace it.

Alternative Part Number(s)

Replaces Part Number 544260001
Replaces Part Number 516147801