My LawnBoy Duraforce didn't start one day last week. For the previous couple of days it would start fine, but overspeed slightly, returning to right rpms quickly. I didn't think too much about it because it was running fine after starting. But, then last Thursday, it wouldn't start. After some diagnostic work, I concluded it was in fuel delivery. I could get it running, and keep it running, albeit rough, but continuing to push the primer bulb. My conclusion: the screen in the fuel bowl was clogged. However, getting the fuel bowl off requires taking out four philips screws, screws that are pointed down, about 1 1/2" above the ground drive shield. My only solution was to take off the carb, rotate it enough to get access to the four screws. I did that, but the sequence included taking off the fuel tank, taking off the three-legged tank support. I did not want to disengage the primer tube (real hassle getting it attached the last time I had it off), and I didn't want to separate the carb from the air cleaner body (held together by the very delicate governor spring). But, after taking all those parts off, I was able to rotate the carb/air cleaner body out, accounting for the governor fin protruding up through the cowling. After all that, I was right -- screen in the bowl was clogged. I cleaned it, put it all back together, and it runs fine. But, my question: Any suggestions on how to get those four screws out without taking off the carb unit? I have screwdriver bits for my 3/8" socket set, but none for my 1/4". Are such bits available, and if so, how long? I could have taken off the belt shield to gain a little more access room -- easier to take off the shield than the other parts. Or, is there another tool for phillips screws in tight quarters? Thanks.