I have a 125BVx Husqvarna leaf blower that was in need of service so I put a new plug in, a new filter, and got a new carb from the Husqvarna store on Amazon.  I also checked to see if there was spark which there is.  New fuel 93 octane Shell mixed to the proper ratio.  It ran though rather poorly for about 2 weeks and now won't start at all.  I don't know where to go from here and any guidance would be appreciated.

There are two recessed adjuster screws on the side of the carb.  Their often set too lean, for emissions.
 
The screwdriver type tools are cheap on Flea Bay and will work.  The screw closest to the block is for low speed adjustment.  The other, high speed. 
 
Adjust the Low Speed  CC to enrich the mixture, maybe 1/4 turn at a time.
 
Keep track of where it was when you started.. You can gently turn it in clockwise, till it seats COUNTING the exact # of turns-for your base line..

Thanks for the reply  I'll check the mixture when I get back to the house.

Don't know when you bought this machine? I just used the "Husqvarna 350BT Gas Leaf Blower" and I really like the brand. If your 125BV x leaf blower cannot be used anymore, you can refer to the one I am using.