I use a pop bottle with a real small hole drilled in the cap, it squirts a nice small stream of fuel. I use it all the time to diagnose a fuel vs electrical problem. Squirt a little in the carb and turn it over, if it starts you can use the bottle to keep it running but don't over do it. If it won't run its probably an electrical issue.
I use this trick to start my tiller every spring, it never wants to start on its own but a minute or two of "bottle feeding" and then she's good to go for the rest of the season.