Dew4You

This machine has been great until last weekend. When I take off with a tube behind, everything is fine. After a few minutes, the machine won't get over 20 mph and seems to struggle with that speed (hesitation and missing). If I feather the throttle, it takes longer before I experience the problem but if I squeeze the throttle all the way, I experience the problem almost immediately. If I take it in to shore and let it sit for a while, it takes off again at full speed and then eventually experiences the same problem. This is the fourth weekend of use this summer with no prior problems. Plugs appear wet when I take them out. Changed them once. Wear ring is fine.

Any suggestions to try before I take it in? Thank you in advance for any words of wisdom!!