Post the Sears# of the unit. It would be something like 917.xxxxxx or similar.
That way, one could at least identify who made it.

The Model number is 944-525800, which I believe is made by Husqvarna. I have tightened the spring tension the to point where the belt will just freewheel when the engagement lever is released. Should I install a stronger spring? There is a possibility that the belt continues to slip even when the lever is fully squeezed due to insufficent tension on the idler pulley. Is this a common problem with this model?

That number doesn't come up at the Sears site-
http://www3.sears.com/

944 is a Husqvarna manf. unit.
13.5 HP for a 27" blower? Sounds like a lot! I'd expect that for a smaller tractor!

This blower was purchased from Sears Canada so would not appear on the US site. It is indeed a Briggs 13.0 HP motor and the width of the blower is 27 inches. It will move a lot of snow. It is snowing now with about 4 to 5 feet on the ground. My driveway is double width and 125 feet long.
I adjusted belt spring tension to the maximum and will try it out this afternoon. Thanks for your comments Bill.

DJ

It sounds like low fluid level in the hydrostatic drive. Honda has an external overflow/fill tank on theirs. Their manual shows the level is at a different levels depending on temperature.

If there was a leak it would have to be repaired. When filling, the transaxle has to be rocked to bleed air from the system.

Hi demijohn, I know this a a long time now, but did you get this problem with your blower fixed? I just got one with the same issue

Having the same problem with my Craftsman Hydrostic Snow Blower. Is there some type of transmission disengage pin like a lawn tractor has?