Husqvarna 917.374426 - Advanced Mower Troubleshooting; Diagnosing Power and Cut Quality; Addressing Vibration and Drive Problems

TROUBLESHOOTING - See appropriate section in manual unless directed
to a Husqvarna or other qualified service center.
PROBLEM CAUSE CORRECTION
Loss of power 1 Rear of mower housing or
blade dragging in grass.
2. Cutting too much grass.
3 Dirty air filter.
4_ Buildup of grass, leaves,
and trash under mower.
5, Too much oil in engine,
6. Walking speed too fast.
Poor cut - 1. Worn, bent or loose blade.
uneven
2. Wheel heights uneven.
3. Buildup of grass, leaves
and trash under mower.
14
3o
t.. Worn, bent or loose blade. 1,
2. Bent engine crankshaft,
1.. Raise cutting height.
2_ Raise cutting height.
3o Clean/replace air filter
4, Clean underside of mower
housing,.
5, Check oil level,
6. Cut at slower walking speed,
Replace blade, Tighten
blade boll
Set all wheels at same
heighL
Clean underside of
mower housing.
Replace blade, Tighten
blade bolt.
2. Contact a Husqvarna or
other qualified service center.
Excessive
vibration
Starter rope
hard to pull
t4
2"
3_
4_
Engine flywheel brake is on
when control bar is released,
Bent engine crankshaft..
Blade adapter broken,
Blade dragging in grass,
Grass catcher
not filling
(If so equipped)
Hard to push
Loss of drive i,
or slowing of 2,
drive speed 3,
4_
1, Cutting height too low.
2, Lift on blade worn off.
3. Catcher not venting air..
1. Grass is too high or wheel
height is too low,
2. Rear of mower housing or'
blade dragging in grass,.
3, Grass catcher too fullo
4, Handle height position not
right for you..
Belt wear_
Belt off of pulley,
Drive cable worn or broken°
"Loose" drive control system_
1. Depress control bar to
upper handle before
pulling the starter rope.
2_ Contact a Husqvarna or'
other qualified service center,
3. Replace blade adapter.
4. Move lawn mower to cut
grass or to hard surface°
1. Raise cutting height.
2. Replace blade°
3, Clean grass catcher..
1.. Raise cutting height,
2. Raise rear of mower housing
one (1) setting higher,
3. Empty grass catcher.
4. Adjust handle height to suit.
1. Check/replace drive belto
2_ Chectdreinstall drive belt,
3, Replace drive cable°
4. Adjust drive control.
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