I have a Shindaiwa t260 which is about 4 yrs old. When it sits on trailer with the carb pointed down, gas seeps into the air filter and then out on the ground. I don't know of a float in 2-cycles. Any idea what might be allowing the gas to run out. Does it just need a carb kit? It still runs good at high speed, but it will die sometimes if I let it idle down too much. Thanks.