Hi,

I have an "overflow" bottle with a brass tube and vent on it.

When filling, I remove the muffler/exhaust pressure line and attach the bottle to the line and I then fill through the carburettor line.

When the tank is full, the excess fuel goes out of the tank, into the exhaust pressure line, and then into the overflow bottle.

After a day's flying I'm amazed with how much fuel I have gathered in the bottle. If I'm careless and don't watch the filling carefully, I sometimes capture enough overflow fuel for another flight! I would have lost this fuel otherwise. I often wonder how much fuel is lost at the flying field with people overfilling.

One hint I picked up over the years to avoid confusing, and mixing the lines is to use a different color line for exhaust pressure and the carburettor input line. I always think of the muffler as being hot, so I use red (pink) fuel line for the exhaust pressure line. I consider the fuel going into the carburettor as being cool, so I use blue fuel line for carburettor input. Its easy for me to remember.

I also have filters in my fuel jug as well as in the carburettor input line. I don't fill through the input line filter.

Hope this helps.

Fly4Fun,

Wayne Miller