I picked up an older (early 90's) Craftsman Leaf Blower from my dad. He just bought a new one and gave this one to me but said he had been having problems keeping it running, typically more so as the outside temp drops. First thing I did was change the spark plug. Then, after filling it up and hitting the primer bulb a few times I noticed that fuel was spewing out the center of the vented gas cap. I figured that shouldn't be the case and thought maybe too much air getting into the fuel lines. Bought a new gas cap. She started up but won't stay running once in half or full throttle. I was able to keep it going for between 5 and 10 minutes by manipulating the control knob. As it was in half or full throttle (didn't seem to matter which, same result) if it sounded like it was getting ready to die I would switch it back to full choke and let it revive and would let it "warm up" for another 5-10 seconds or so before moving it back to throttle. It would run for 15-20 seconds and I would have to repeat the same process over again, back to choke, into throttle, back to choke. Any suggestions as to what my first steps should be to pinpoint the problem?
