Craftsman snow blower wont blow far- even after new belts, plug and carb rebuild

First of all hello,
Ive used lots of this sites info to get me this far and it has helped tremendously. But, I am stuck now. The serial is 536-884822. It sounds good but, the motor is lacking power it seems. It will blow 2 ft away until it gets 5 in of snow (powder) then it tries to die. Now its a hand plow. Auger belt just got replaced and is tight. Plug is new. All pins seem to be in tact. Both augers move smooth when rotated by hand (when off of course). I took apart the carb, blew out (only 1 welsh cap right? Kit came with 2 and outer would not give. Looks perminent) I only soaked it for 3 hrs:NO NO NO: I probably need to re-do. Fuel screw is 1.5 out and so is mixture (I messed with settings with no luck) I put it back togather and it ran exactly the same. It there something i forgot to check besides re-doing the carb? I would really appreciate the input. Im taking it in asap if i cant do it and that is too humbling. My wife thinks Im obsessed. Thank you and happy holidays!

 

Also it there supposed to be a fuel filter in line? Thanks

 

For a hand plow, I take it to be a two stroke (?). You can check the muffler to see if it's partially plugged with carbon. While you have that off look inside the cylinder to see if there is any scoring in the cylinder.

May be a fuel filter inside the fuel tank. Check the gas cap for venting - if plugged it would block the fuel flow. Also put in new gas with proper mix ratio.

** Tell your wife obsession drives men up the ladder of success. Then if you're still able, go work on the snow blower.

 

You have a 4 stroke Tecumseh engine on your tracked snowblower which was made by Murray. You could have a blown head gasket or sticking valve. Usually there is no in-line gas filter on snowblowers.
Yes, gas cap vent could be clogged. Do you have the "heater box" installed? This piece is needed for proper engine operation on a snowblower.