The carb on my Kawi fvc420 14hp single, is overflowing fuel. I've disassembled, cleaned and replaced the carb and it still dumps fuel from the overflow tube? The float and needle appear okay, yet I assume the float has a hole or the needle is sticking. Since the float is a special order item, can the hole be repaired? Also, once the repairs are made what's the best way of setting the adjustments on the carb?