Richie,

I would have said the same as John.. if you look in the first pic you'll see the switch JohnS refers to, betwen R1 and R2. If you disconnect the wiring to terminal W2 in the motor box you should find that the motor will start off load (you may need to spin it by hand) and will run without overheating. If thats the case then the centrifugal switch needs overhauling. Possibly the contacts have welded...