Re: force eng.smoke,and fuel form lwer unit
If I understand what you are saying, when you are running the engine it smokes - that is pretty typical of these engines, at idle they are fairly smokey depending upon the age of the gas, amount and type of 2 stroke oil, was it mixed correctly and whether the idle mixture is correctly set up. Also the carb floats may be too high. It's not a big problem unless you do a lot of idling.
As for fuel in the water, that can either be normal depending upon just how bad it is (over rich idle mixture makes this even more apparent) or it could be a fuel leak which would be obvious if you run without the engine cover in place. Culprits are the hoses and the joints, fuel pump/strainer gasket and the fuel bowls on the carbs - again it will be obvious.
If it's a light film on calm water then that's pretty normal.