Husqvarna YTH20K42 User Manual (English)

Questions and Answers:

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Kurt RhodesAug 22, 2025
How to fix Husqvarna Lawn Mower that is hard to start?
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  graynicoleAug 22, 2025
  If your Husqvarna Lawn Mower is hard to start, consider the following: * A dirty air filter can cause this, so clean or replace it. * A bad spark plug may be the issue, so replace it. * If the battery is weak or dead, recharge or replace it. * A dirty fuel filter can also make it hard to start, so replace it. * Stale or dirty fuel could be the problem; empty the fuel tank and refill it with fresh, clean gas. * Check all wiring for any looseness or damage. * If the engine valves are out of adjustment, contact an authorized service center.
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Melissa AyersAug 25, 2025
What to do if Husqvarna YTH20K42 engine will not turn over?
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  Joseph BushAug 25, 2025
  If the engine of your Husqvarna Lawn Mower won't turn over, try the following: * Ensure the brake pedal is depressed. * Disengage the attachment clutch. * Recharge or replace the battery if it's weak or dead. * Replace the fuse if it's blown. * Clean the battery terminals if they are corroded. * Check all wiring for looseness or damage. * Check or replace the ignition switch if it's faulty. * Check or replace the solenoid or starter if they are faulty. * If the operator presence switches are faulty, contact an authorized service center.
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crobertsonAug 26, 2025
Why Husqvarna Lawn Mower battery will not charge?
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  Tracy MartinAug 27, 2025
  If your Husqvarna Lawn Mower battery isn't charging, consider these possibilities: * Bad battery cells. Replace the battery. * Poor cable connections. Check and clean all connections. * A faulty regulator (if equipped). Replace the regulator. * A faulty alternator. Replace the alternator.
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Chad TaylorAug 28, 2025
Why Husqvarna YTH20K42 engine "backfires” when turning engine “OFF”?
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  Tyler WhiteAug 28, 2025
  The Husqvarna Lawn Mower engine backfiring when turned off is due to: * Engine throttle control not set between half and full speed (fast) position before stopping engine. Move throttle control between half and full speed (fast) position before stopping engine.
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teresaclaytonSep 1, 2025
What causes poor cut - uneven with Husqvarna YTH20K42?
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  Mark CookSep 1, 2025
  An uneven cut with your Husqvarna Lawn Mower can result from: * A worn, bent, or loose blade. Replace the blade and tighten the blade bolt. * A mower deck that is not level. Level the mower deck. * A buildup of grass, leaves, or trash under the mower. Clean the underside of the mower housing. * A bent blade mandrel. Replace the blade mandrel. * Clogged mower deck vent holes due to buildup of grass, leaves, and trash around the mandrels. Clean around the mandrels to open the vent holes.
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Anne MaddenSep 2, 2025
Why Husqvarna YTH20K42 Lawn Mower engine clicks but will not start?
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  Jesus SummersSep 3, 2025
  If your Husqvarna Lawn Mower engine clicks but doesn't start, it could be due to: * A weak or dead battery, so recharge or replace it. * Corroded battery terminals, so clean them. * Loose or damaged wiring, so check all wiring. * A faulty solenoid or starter, so check or replace them.
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Alexandria GarciaSep 5, 2025
Why Husqvarna Lawn Mower has excessive vibration?
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  Robert RichardsSep 5, 2025
  Excessive vibration in your Husqvarna Lawn Mower can be caused by: * A worn, bent, or loose blade. Replace the blade and tighten the blade bolt. * A bent blade mandrel. Replace the blade mandrel. * Loose or damaged parts. Tighten any loose parts and replace any damaged parts.
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Caitlyn BurgessSep 6, 2025
What to do if Husqvarna Lawn Mower blades will not rotate?
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  ashley16Sep 7, 2025
  If the blades on your Husqvarna Lawn Mower won't rotate, check for: * An obstruction in the clutch mechanism. Remove any obstruction. * A worn or damaged mower drive belt. Replace the mower drive belt. * A frozen idler pulley. Replace the idler pulley. * A frozen blade mandrel. Replace the blade mandrel.
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Mrs. Angela MillerSep 12, 2025
Why Husqvarna YTH20K42 Lawn Mower headlight(s) not working?
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  Connie BryantSep 12, 2025
  If the headlights on your Husqvarna Lawn Mower aren't working, check the following: * Ensure the switch is turned “ON”. * Replace the bulb(s) or lamp(s) if they are burned out. * Check or replace the light switch if it's faulty. * Inspect the wiring and connections for looseness or damage. * Replace the fuse if it's blown.
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Philip RussellSep 13, 2025
What causes loss of drive in Husqvarna Lawn Mower?
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  justinbrownSep 13, 2025
  Loss of drive in your Husqvarna Lawn Mower can be attributed to: * The freewheel control being in the “disengaged” position. Place the freewheel control in the “engaged” position. * A worn, damaged, or broken motion drive belt. Replace the motion drive belt. * Air trapped in the transmission during shipment or servicing. Purge the transmission. * Missing axle key. Install axle key at rear wheel. See "TO REMOVE WHEEL" in the Service and Adjustments section.