I have a Toro two stage snow thrower that has an auger issue..left just spins as it want the right moves snow....how do I fix...the machine is 13 years old can't find any answers....help please.

a single is just that a single auger that scoops snow and shoots it out chute their a smaller unit --a dual front auger scoops snow into another auger which shoots the snow through the chute the duals are bigger and they move more and heavier snow

Check for broken shear bolts first. Then, move on and check the auger belt. Finally, if all those are ok, check the gear housing on the auger drive shaft (right in front, between the two auger blades).

you need to put in the shear pin dont use a regular bolt

The shear pin is sheared off. Somewhere along the auger, you'll find a hole drilled all the way through it. The shaft inside also has a hole drilled all the way through it. Compare the two augers - the holes are USUALLY in a straight line with each other (when one is up/down, the other is also up/down).

Get a replacement shear pin (DO NOT use a hardened bolt!) and put it through the holes when the auger holes are lined up with the axle holes.

Single-Stage Gas Snow Blower Parts

Single Stage Snow Throwers by MTD Products

Yard Machines Snowblower Parts

Yard Machines Snowblower Parts

blower might still work but gear case that runs auger is shot or you sheared the shear pins in auger

Replace belt

check the belt and tensioner
adjust the cable for more tension

It sounds like you have sheared a roll pin. Look at the auger that is not turning, on one end you will see a hole, there is a steel pin that goes through the shaft, I am pretty sure that pin has sheared and allows the auger to spin freely on the shaft. You may have to find a small punch and drive out the broken piece before inserting new one. Seeing how the auger has been spinning on the shaft you're gonna have to line up the hole in the auger with the hole in the shaft. Look at the good side to see alignment. Hope this helps ya.

the problem could be the snow is to heavy for the motor to keep up, if thats the case you may need to upgrade to a more powerful model or try not to overload it. take it a little slower so the motor can keep up. but try tightening the belt. with your pointer finger push down on the belt it should have about a half inch give, if it moves more than that its too loose and probably slipping under load