I have an odd issue, my Still handheld leaf blower stops running when I pick it up and lean it forward to blow the ground. It will run fine on the ground with choke on full, half and off, with full power too. Starts on the first pull, idle is on the rich side rather than too lean. But as soon as I pick it up and slightly tilt it forward it cuts out. Any ideas?

I have a Honda HRM21. This thing has been a great mower for my family and I for 20 years. Last year it sat for probably close to 6 months while I was working on fixing a couple things wrong with it. Anyway, I got everything back together and it ran perfectly 5-6 times for a grand total of around 35-40 minutes. Point being, it definitely worked. Then, one time I go to start it and it will start on choke, but as soon as I kick up the RPM's it just dies out. I've done all the easy things like fresh gas, new spark plug, new air filter. Additionally I've taken the carb completely apart and done a solid cleaning. All of the orifices on the carb were clean, but I went ahead and did a solid cleaning. Anyway, that was of no help, it does the same thing. Is there a way to compression check the cylinder on these things? What are the chances my piston rings went bad? A replacement carb is $45, so I [I]could[/I] do that, but my gut just says that wasn't it based on how it clean it was. Any recommendations? I'm a little afraid rust might have gotten to me while it sat.