I have a weedeater 25cc string trimmer and problems started when I broke the pull rope trying to start it. I then fix the pull rope and it basically never started ever since. I tried to take the carb appart and clean it and it didn't make a difference. Then I bought a new card and put it on and it runs but I gotta keep playing with the choke from full to half or else it dies. Although sometimes I get it to run for 10 mins then it dies. I don't have the special carb tool to adjust the screw on the new carb and I don't really know how to adjust it properly. One thing I notice is that when you tilt the trimmer wither up or down, the engine runs differently, it either speeds up or slows down. Not sure what that could be since it's never done that even with low fuel. I haven't changed the sparkplug yet maybe I should try that. Also, I was using trufuel but now started to use regular gas with oil and seafoam. Do you guys have any idea what the issue could be?