IF
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CHECK
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Engine Will Not Start
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Fuel tank is empty.
Disconnected or dirty spark plug.
Battery dead (JS46).
Stale or dirty fuel.
Excess oil in engine or air cleaner filter saturated with oil.
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Engine Starts Hard, Loses Power, or Runs Rough
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Stale or dirty fuel.
Dirty air cleaner components.
Dirty spark plug.
Engine speed needs adjusting - See your John Deere Dealer.
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Engine Stalls
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Cold engine.
Cutting height too low.
Mowing too fast.
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Engine Vibrates
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Loose blade bolt.
Blade bent or not balanced.
Drive belt loose or frayed.
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Mower Mows Unevenly
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Height adjusters are not even (JS26).
Mowing pattern not changed.
Blade dull, bent, or not balanced.
Ground speed too fast for conditions.
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Discharge Chute Plugs
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Grass not dry.
Cutting height not raised high enough.
Dirty or full grass bag.
Mowing too fast.
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Mower Jerks or Will Not Move
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Drive belt broken.
Transmission/wheel drive out of adjustment.
Neutral lock is locked.
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Mulched Grass Clumps or Rough
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Grass not dry.
Mowing too fast.
Blade dull.
Cutting height set too low.
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Slow Maximum Ground Speed
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Adjust drive cable using thumbwheel adjuster to increase ground speed.
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