Hi Guys,
Probbaly a bit late but may be of help to people in the future.
After checking that there are no blockages preventing the cutter impeller from spinning freely connect up the electric to the motor, push the rubber membrane up or stand it on a small screw driver to hold the switch on and the if motor is humming quickly spin the impeller or cutting head carefully with a screwdriver if the machine starts and sounds ok run it for 5 min or so from cold (time it)
if it still sounds ok replace the cap with a 10 - 12mf 440 volt
ac cap from Maplin or RS a 10,12,14,15mf all work.
If the motor sounds like a buscuit tin full of marbles replace the machine.
Muncher
November 2014