Husqvarna YTH20B42T User Manual

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TROUBLESHOOTING POINTS
Engine dies when 1. Reverse operation system 1. Turn ignition key to
tractor is shifted (ROS) is not "ON" while ROS "ON" position.
into reverse mower or other attachment See Operation section.
is engaged.
Engine continues to run 1. Faulty operator-safety presence control system. 1. Check wiring, switches and connections. If not
when operator leaves seat corrected, contact an authorized service center/
with attachment clutch department.
engaged
Poor cut - uneven 1. Worn, bent or loose blade. 1. Replace blade. Tighten blade bolt.
2. Mower deck not level. 2. Level mower deck.
3. Buildup of grass, leaves, and trash under mower. 3. Clean underside of mower housing.
4. Bent blade mandrel. 4. Replace blade mandrel.
5. Clogged mower deck vent holes from buildup of 5. Clean around mandrels to open vent holes.
grass, leaves, and trash around mandrels.
Mower blades will not 1. Obstruction in clutch mechanism. 1. Remove obstruction.
rotate 2. Worn/damaged mower drive belt. 2. Replace mower drive belt.
3. Frozen idler pulley. 3. Replace idler pulley.
4. Frozen blade mandrel. 4. Replace blade mandrel.
Poor grass discharge 1. Engine speed too slow. 1. Place throttle control in “FAST” position.
2. Travel speed too fast. 2. Shift to slower speed.
3. Wet grass. 3. Allow grass to dry before mowing.
4. Mower deck not level. 4. Level mower deck.
5. Low/uneven tire air pressure. 5. Check tires for proper air pressure.
6. Worn, bent or loose blade. 6. Replace blade. Tighten blade bolt.
7. Buildup of grass, leaves and trash under mower. 7. Clean underside of mower housing.
8. Mower drive belt worn. 8. Replace mower drive belt.
9. Blades improperly installed. 9. Reinstall blades sharp edge down.
10. Improper blades used. 10. Replace with blades listed in this manual.
11. Clogged mower deck vent holes from buildup of 11. Clean around mandrels to open vent holes.
grass, leaves, and trash around mandrels.
Headlight(s) not working 1. Light switch is “OFF”. 1. Turn light switch “ON”.
(if so equipped) 2. Bulb(s) or lamp(s) burned out. 2. Replace bulb(s) or lamp(s).
3. Faulty light switch. 3. Check/replace light switch.
4. Loose or damaged wiring. 4. Check wiring and connections.
5. Blown fuse. 5. Replace fuse.
Battery will not charge 1. Bad battery cell(s). 1. Replace battery.
2. Poor cable connections. 2. Check/clean all connections.
3. Faulty regulator (if so equipped). 3. Replace regulator.
4. Faulty alternator. 4. Replace alternator.
Loss of drive 1. Freewheel control in “disengaged” position. 1. Place freewheel control in “engaged” position.
2. Motion drive belt worn, damaged, or broken. 2. Replace motion drive belt.
3. Air trapped in transmission during shipment 3. Purge transmission.
or servicing.
Engine “backfi res” when 1. Engine throttle control not set between half and 1. Move throttle control between half and full speed
turning engine “OFF” full speed (fast) position before stopping engine. (fast) position before stopping engine.
PROBLEM CAUSE CORRECTION

Husqvarna YTH20B42T Specifications

General

Brand	Husqvarna
Model	YTH20B42T
Category	Lawn Mower
Language	English