My 335 was gone through pretty thoroughly over the winter, and was running great with the exception of a hesitation and miss at 1/4 to 3/4 throttle. At first, it was just a slight issue, but it seems to be getting worse. It idles fine and for as along as I want it to. Starts fine also. Once I get past the miss going up a hill at 3/4 to full throttle, it runs strong and pulls hard with little to no miss or hesitation during the pull up the hill. Once I let off at the top, and get back into it below full throttle, it starts to hesitate and miss again. No backfiring or popping, just hesitation and miss. I put a new plug in over the winter. Using new gas. Carb was THOROUGHLY cleaned over the winter. There were no clogged orifices at that time. Any thoughts on what this could be or what I should do to troubleshoot?