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Part No 840245 18 Form No F060711D
MV650SPH Self-Propelled Vacuum Owner’s Manual
WIRING DIAGRAMS
Bag Switch Circuit Schematic Diagram
TROUBLESHOOTING
Problem Possible Cause Solution
Will not vacuum or has poor vacuum
performance.
· Dirty or full debris bag or filter. · Clean debris bag and filter. Shake bag clean or
wash.
· Nozzle height set too high or too low. · Adjust nozzle height (see page 14).
· Hose kit cap missing. · Check for hose kit cap.
· Clogged nozzle or exhaust. · Unclog nozzle or exhaust (see page 5)
· Excessive quantity of debris. · Allow air to feed with debris.
Abnormal vibration. · Loose or out of balance impeller. · Check impeller and replace if required.
· Loose engine. · Check engine.
Engine will not start. · Throttle in off position. · Check throttle control (see page 13).
· Engine not in full choke position. · Check throttle, choke position (see page 13).
· Out of gasoline or bad, old gasoline. · Check gasoline.
· Spark Plug wire disconnected. · Connect spark plug wire.
· Gas valve off. · Turn on gas valve.
· Dirty air cleaner. · Clean or replace air cleaner. Contact a qualified
service person.
· Safety Interlock disengaged on bag plate. · Latch the bag properly or check the bag rod to
see if it is bent.
Engine is locked, will not pull over. · Impeller plugged or clogged. · Remove debris (see page 16).
· Engine problem. · Contact an engine servicing dealer for engine
problems.
No self-propelling · Drive clutch not engaged · Engage the drive clutch lever.
· Transmission not in gear. · Check transmission shift control (see page 16).
· Drive belt worn or broken · Check the drive belt.
· Drive clutch cable out of adjustment or broken. · Check the drive clutch cable (see page 20).
· Spring tension too loose · Check spring legnth (see page 20).
· Drive chain off the sprocket. · Check the drive chain (see page 22).
Self propelled drive will not release · Improper drive clutch cable adjustment or
cable is kinked.
· Check the drive clutch cable (see page 20).
Noisy or broken chain · No chain lubrication. · Lubricate chain.
· Chain misalignment or tension. · Check the drive chain (see page 22).