Ariens 520 snowblower the rotating blades are not powered by the engine and are just spinning?

It seems to be a common issue when you change a belt! Most people have it the other was when they won't turn.

https://www.google.com/search?q=Ariens+snowblower+932102+auger+will+not+stop+spinning

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Tecumseh HSK35 40 HSSK50 Operator Manual

Not the best, but it's the correct manual for your Tecumseh HSSK-50 engine.

It sounds like the auger always turning is the auger engagement handle/line/connections are not adjusted correctly. They/it is too tight causing the auger to engage before it should. It may be up at the handle where you loosen a jam nut, screw in or out a threaded shaft, and retighten the jam nut. (If you have ever adjusted a bicycle brake it is similar.) (I have a craftsman, made by MTD, and I think I saw MTD also list Ariens.) Or it could be an adjustment somewhere else (but I'm not sure where).

As far as one auger moving and the other not, you may have a shear-pin (shear bolt as the manual calls them) on each side of the auger's shaft (my craftsman has one on each side), and the one on the side that stops turning is sheared off. (It moves without snow present due to the driveshaft inside the outer auger shaft turning, but it won't turn under load (snow).) You may confirm a sheared-pin by turning the machine off and try to turn the auger blade. If it turns somewhat easily, that's a bad shear pin. Remove the old shear pin. If the old one is as long as the new one, that aint the problem. The shear pin in the image is one kind. Mine appear as a straight bolt (no grooves), threaded the entire length. You will have to rotate the auger blade until it aligns with the hole in the shaft. Use a nail that fits and rotate the blade until the nail goes in. Remove the nail and screw in the shear bolt:


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The auger clutch control up at the handle looks like this:
From my manual
Auger Control

• To check the adjustment of the auger control, push forward the left hand clutch grip until the rubber bumper is compressed. There should be slack in the clutch cable.
• Release the clutch grip. The cable should be straight. Make certain you can depress the auger control grip against the left handle completely.
• If adjustment is necessary, loosen the hex jam nut and thread the cable in (for less slack) or out (for more slack). Recheck adjustment. Tighten the jam nut when correct adjustment is reached.

Here's another view of that:

I hope the above info helps you take care of both issues.

No you do not..you have the model number and hp should do it ..go in on your computer and just put the name,model number,hp and model in that order .or better yet go in on eBay and put that in and most likely you will find it a a reduced cost..good luck

if auger wont spin heat it up a little

Sounds like the mower deck is lower on one side. I am having the same problem with my older tractor mower.

Sounds like you have a broken or partially broken shear pin in the auger.Check along the auger[machine off]and see if there is what looks like a bolt anywhere along the auger shaft.If there is [and there will be] remove and inspect it and you will see why the auger is not working.Next time,never clean out a chute or auger while the engine is running,people loose limbs this way.

Back wheels have a gear that connects to the drive chain. on each side. those spin.
The front ones which are Idlers do not spin as the idler wheel as a bushing in it that allows free motion on the shaft without resistance. Use a nylock nut with Locktight for starters. The try that.

Hope this helps. -Jeff anchorage small engine repair.

i have a old ariens ST724 snowblower engine will only run with full choke.