has anyone had problems with gas lines swelling and starving the motor for gas bought the fuel lines at hobby store could they be for nitro because gas shouldnt be in them it only swells in the tank but shuts the gas off at the hole through the gas tank

I buy Tygon Large Diameter tubing(meant for gasoline). I know that lines marked for Nitro are probably not compatible with gas. Maybe something to do with Silicone content (Scott or Marc probably know). Once I had used nitro line on my manual fuel pump. I left the lines in the can while I was running for 10-15 minutes. When I went to refuel, they were swollen.

Yup ... Alki in the fuel does this, some rubbers handle it better than others.
As said, Tygon work great !!

Silicone Nitro fuel line is a BIG No No with gas

i went and got new lines hope 3/16 inside diameter is good they did have 1/8 almost got my next boat for my girl friend done waiting for all the drive stuff to come from warehouse hobby man are they slow lol been over a week for props