I left my snowblower in the service position for about a year. Some of the oil leaked out and I think got the belts oil soaked. Now it takes very little snow to stop the auger and I thought I smelled burning rubber.. It's a Toro promax 1028 model 38640. It's about 4 years old with a tecumshe engine for some reason Toro doesn't have the online parts manual for it. All the videos on you tube seem to be for one stage blowers. Any advice would be appreciated.