Scotts S1642 Operator's Manual page 51

IF
Engine Stops When Gear Shift Lever Is Moved To
The R (REVERSE) Position and Attachment Is
Engaged (Gear)
Mower
IF
Mower Blades Will Not Rotate
Discharge Chute Plugging
Patches Of Grass Uncut
Belt Slipping
Too Much Vibration
Blades Scalping Grass
TROUBLESHOOTING
CHECK
Normal condition. (See Using Reverse Implement Option in the
OPERATING section.)
CHECK
Obstruction in clutch mechanism, or blades.
Worn/damaged mower drive belt.
Frozen idler pulley.
Frozen blade mandrel.
Belt worn or installed incorrectly.
Grass too wet.
Buildup of grass, leaves and trash under mower.
Worn, bent or loose blade.
Mower deck not level.
Engine rpm too low.
Travel speed too fast.
Low/uneven tire pressure.
Blades improperly installed.
Improper blades used.
Travel speed too fast.
Engine rpm too low.
Debris in sheaves.
Worn belt.
Worn, bent or loose blade(s).
Bent blade spindle.
Damaged drive belt.
Cutting too low.
Turning speed too fast.
Ridges in terrain.
Rough or uneven terrain.
Low tire pressure.
Mower gauge wheels not adjusted correctly.
Bent blade(s).
Troubleshooting - 47