Husqvarna 521 SSE Snowblower is about 5 years old and will not throw snow. We took on the slack in the calble that controls the belt pulley via the adjustment screw on cable but still will not throw snow... wants to simple push it out front of augers

Hi,
Your snowthrower is made for Husqvarna by Murray(which may mean Snapper) and has the model number of 621502X37NA in actuality. I did find the Owners and Parts Manuals at these locations:
http://weborder.husqvarna.com/order_...6_O0607004.pdf
and:
http://bsintek.basco.com/BriggsDocum...E5CNh5jbp796Dq
Peace,
Clarke