Fix Fault Briggs

drive shaft no longer turns wheels, engines fine, belts intact pulley fine but just turns in my hand not engage rotor shaft. appears to be sealed unit, does it come out, can it be replaced. ?

I am trying to find a drive nut that screws into the end of the crank/drive shaft on my briggs&stratton engine that drives a m1 gardener 816 rotivator.

Merry Tiller Major, Briggs 5HPengine, only starts with easy start, sometimes once its been running it will start again but mostly need to use easystart again?

need 2 v belts, not sure what size, for my norlett, don't know make of machine, has briggs and straken 5 hp motor, also has 4 lots of 4 tines on front, and also has a reverse gear

engine will start but sound rough