Havin a problem with my trimmer. Some help would be appreciated. Let me start from the beginning so diagnosis will be easy (as possible). This unit was purchased new in spring 2005. It has run like a champ, until now. I used it commercially (light) when I had my lawn business, but only use it at a homeowner's level, since spring 2006. So 1 season of light commercial, 2 as homeowner. It ran great through the end of last year, but I didn't drain the fuel or put an additive in it this winter. Reason is, it was in Dallas and I was in Waco. My dad was mowing my yard in Dallas while the house was on the market. The house sold in March of this year, so that is when I got the trimmer from sitting in the garage since October/November. So, it sat for about 5 - 6 months. Went to crank it up last week, and it wouldn't start. I added a little carb cleaner (Seafoam Deep Creep) to the carb from the air intake, put the air filter back on, and tried to crank. It still wouldn't start. It seemed to fire a little and put out some grey smoke when it fired. Wouldn't come close to actually running though. I then checked the plug. It was nasty. Lots of carbon build up on it. I don't think I've ever changed it. I knew it needed replacing, but I wanted to get the thing running at least for now, so I sprayed some Seafoam in the spark plug opening. It fired on a few pulls and put out some grey smoke, but never actually started. It was good to see a sign of life. I gave up that day after 20 more pulls. I went to my dealer and bought a new plug and fuel filter. I drained the gas that was in the tank. I realized that it was actually from last fall, maybe even late summer. I put in new mixed gas. I installed the plug and fuel filter. Tried to crank, but nothing. So I went with the carb cleaner again. Sprayed some in the carb - kinda fired and put out grey smoke, but wouldn't start. I took out the plug and sprayed a liberal amount in the spark plug opening. Put the plug and wire back on. IT CRANKED and ran strong....for about 5 seconds, then died - sounded like an engine running out of gas. I pulled it a few more times, it ran a couple more times, but only for a second or 2. It seemed like it was running on the carb cleaner I sprayed, not the intended fuel. I pulled it quite a few more times, but nothing happened. Where do I go from here? It seems fuel is not getting to the engine. Should I disassemble the carb and clean it with carb cleaner? Should I get a carb rebuild kit? How difficult are these carbs to work on? I'm handy, but am a novice at engine repair.