This chainsaw has 110lbs of compression. The fuel line was broke so I replaced the fuel line. The saw has a Tillotson WU40B carburetor. I have cleaned (spray brake clean, no compressed air). Installed a new kit. The saw will start after several pulls. Will run for a few seconds, but I can not rev it up. It acts like it is not getting enough fuel. The tillotson carb is NLA from Stihl or MWE' The carb is replaced by a Walbro WT 16-1 which is also NLA. I have pressure tested the carb and it shows good. Can anyone give some suggestions that I can do to save this saw? Thanks in advance.