Motor cranks but will not start and idle. Will sometimes start at 1/2 throttle but runs rough and fuel dumping from prop exhaust . Flames .noticed a slight drop in compression on 2cylinders (2 or 3points)90-102 worst to best . Water got into fuel tank. Still won't run on aux tank replaced needle valves and seats.floats All set good. Running out of ideas, please help! Mikep