Husqvarna Lawn Tractor 48" Deck, 23 Hp, Model# Yth2348 Logo

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Posted on Apr 11, 2011
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I aqm having difficulty with my 4218 ZT Husqvarna with a Kawasaki (FH531) 18hp engine. When the deck is engaged the engine bogs down to the point where mower will not move or blades will not turn. I have replaced the deck idlers and spindles. The motor is also difficult to start but runs good except when deck is engaged. Does anyone have any suggestions.

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  • larrybeckiek Apr 13, 2011

    The mower is a Husqvarna model # ZTHKW4218A (42 inch cut) with a Kawasaki 18 hp enigne Model FH531VA20402 18 h/p verus the 48 inch cut 23 hp mentioned above. When the problem initally started, I replaced the clutch with improvement for a short durattion. The problem started again after a short period (5 to 10 times of clutch being engaged). Could the problem be associated with a defective spindle (spindle locking up when clutch is engaged) or is there possibly a bearing problem in the engine. I have noted that the deck belt has a jerking and causes the tension idler to have a bouncing action. Are there any other recommentations or solutions?

  • larrybeckiek Apr 16, 2011

    Thank you. I will check the spindles.

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  • Posted on Apr 11, 2011
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Hi, it sounds like the something is wrong with the electric clutch. It has a brake built into it that is supposed to stop the blades when the clutch is disengaged.
The clutch has a rotor attached to the engine shaft. The coil is inside the rotor toward the engine. There's a clutch disc attached by leaf springs to the pulley for the belt that drives the blades. There's a brake ring around the disc. When the clutch is engaged, the disc moves away from the brake ring and is held tight to the rotor.

  • Anonymous Apr 13, 2011

    Hi, i think it should be as a result of a defective spindle............

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