I have a issue with my little 25 Merc, it’s a 2007 tiller manual choke 2 cylinder single carb model. The motor runs great a low speed but when you try to run WOT it bogs down. I have had the carb cleaned at my local marc dealer, changed the fuel line, cleaned the tank, changed the plugs, and changed the water pump, all of these things helped a little (maybe it sure starts easier) but it still will not pull WOT. I have checked the compression 116 lbs on both cylinders. I’m stumped any one have any sugestions?