I have to assume you assembled your blower your self, not Home Depot. Belt run in is just a brake in period. Your auger belt should be adjusted so it will grab when you depress your handle, when you do so you will here a churp as it enguages. Your belt has a coating on it to help as it gets seated an it will ware off, your belt will also stretch. After you run your unit a wile, you need to make sure it is adjusted properly. If it is to loose it will slip and burn up under load. The best way to adjust your belts is to listen to it.
With you unit running enguage your auger. You should here a short churp sound. pay attention how far you had to squeese your handle. You should not have to squeese far When you release it you should NEVER here a churp/squeeling noise.That noise is your belt still grabbing . It will burn up. Adjust your belt so it will churp when you enguage it, and no churp when you release it. Your auger should never turn with handle released .Try not to use up all your adjustment. With time you belt will ware and stretch. That will allow you to re adjust it over time. It is always a good idea to have a extra set of belts just in case. You can tell your belts are slipping because your machine will not throw snow as far. You may even here it squeel wile throwing snow or even see it smoke.
Make sure you give your machine a good grease job. Wax it too. Dont forget to change your oil after your first 5 hours and at least every 25 hours or once a year. Mobil 1 is great. Don't forget to run stabil in your gas. It will prevent carb problems. Never run your machine with ethonall gas it will destroy it. Good old regular gas. My Ariens is 16 years old , looks and runs like new I changed my belts once. Never ever had a problem with it. Good luck with yours. Before I forget get at least 4 extra sheer pins. you may pick up a rock and sheer one.
This message was modified Jan 12, 2011 by bus708