Scotts S2546 Operator's Manual page 51

IF
Loss of power
Engine continues to run when operator leaves
seat
Engine Backfires When Turning Engine "OFF"
Engine will not turn over
Headlight not working
Battery will not charge
Mower blades will not rotate
TROUBLESHOOTING
CHECK
Cutting too much grass /too fast.
Throttle in "CHOKE" position.
Buildup of grass, leaves and trash under mower.
Dirty air filter.
Low oil/dirty oil.
Faulty spark plug.
Dirty fuel filter.
Stale or dirty fuel.
Water in fuel.
Spark plug wire loose.
Dirty engine air screen/fins.
Dirty/clogged muffler.
Loose or damaged wiring.
Carburetor out of adjustment.
Faulty operator-presence safety switch.
Engine throttle control not set at "SLOW" position for 30 seconds
before stopping engine.
Clutch/brake pedal not depressed.
Attachment clutch is engaged.
Weak or dead battery.
Blown fuse.
Corroded battery terminals.
Loose or damaged wiring.
Faulty ignition switch.
Faulty solenoid or starter.
Faulty operator presence switch.
Bulb(s) burned out.
Loose or damaged wiring.
Blown fuse.
Bad battery cell(s).
Poor cable connections.
Faulty regulator/rectifier.
Obstruction in clutch mechanism, or blades.
Worn/damaged mower drive belt.
Frozen idler pulley.
Frozen blade mandrel.
Troubleshooting - Page 48