The electric motor usually has some abnormalities when they are in service. When the electric motor has the problem that does not start in a vacuum, the most likely causes are: interrupted armature circuit; coils switching or armor in short; Defective drive system; toothbrush holder out of neutral zone and interrupted field circuit.
To solve this problem the electric motor will need to examine the input conductors and terminals; identifying the short circuit, and to recover it; check for interruption or defect in the drive system; adjusting the neutral zone or eliminate interruption.
When the electric motor sh-n-350 hose reels starts jerkily, indicates that the drive system may be faulty; there is short between the windings in the armature or there is short between the switch blades.
To resolve this problem you need to solve the made in electric motor; recondition the armature and the switch examine and also eliminate the short circuit.
If the electric motor is not accepting charge, the problem may be a short circuit between turns in the armor; voltage drop; displaced brushes the neutral zone or set bad drive system.