sounds to me like you been using fuel with methanol and it has finally eaten up your gas hose inside and is clogging the carburetor. if so, won't be munch longer before you are out and it won't get you back to the landing. best be sure you got a strong charge on the trolling motor or a good paddle. I would start there. get a clean jar and pump gas thru the gas line into the jar. if you see rubbish, that's most likely the problem.