Common Problem easily fixed!
Problem 1: The outlet line of your fuel tank is positioned significantly below the middle of the tank. That devil gravity is pulling everything towards the center of the earth, including your fuel tank contents. If the contents can just find a way out of the tank i.e. the outlet line of your tank, that gravity will empty your for you. Bad Gravity!
Solution: Have you ever seen gravity cause a fluid to run uphill? I did once, But decided to quit smoking that stuff! No fluids will not run uphill from gravity. So here's the trick: On the engine side of the tank, Loop the fuel outlet line up above the tank centerline and back down to the fuel inlet fitting on the carb, Then snub nose at Gravity!
Problem 2: The Vacuum inlet for your engine is pointed towards the place(the earth's surface) that the earth keeps it's dirt and other stuff we don't want on the inside of our engines.
Solution
etermine whether you are cheap or not.
If Cheap: While wife is talking on the phone to to her mother about how cheap you are, sneak into bedroom, find some nylons of hers, and remove a section of nylon about the size of a half dollar. When you put the nylons back in the drawer, fray the edges and make it look as though she tore them on something! Take the piece of nylon and drape it over the carb. air inlet and wrap the rest of the material around the outside of the air inlet. Then secure the nylon by wrapping a rubberband around the outside base of the carb thoat so as to secure the nylon gatherd there.
If not Cheap: Buy an airfilter at the Hobby Shop.
I used a YS 45 RE on my Venus. Very Enjoyable set up! Bryce