Hi. A friend of mine has a Toro CCR 2500 Snowthrower that only wants to run when the choke is on. We are guessing that there are issues with the carburetor. IF cleaning the carb doesn't fix the issue is it worth getting a new carb for this? The original part number I believe is 632751. Does anyone know of a good reasonable source for this part or a new part number that replaced this? Thanks for the help!

Other information...
Model Number 38425
Model Year 1997
Serial number 7900001-7999999
Engine/Motor Manufacturer Tecumseh
Engine/Motor Model # HSK850-8312B
Engine/Motor Size 5 hp
Engine/Motor Type 2 Cycle