The problem with using the large line is Tygon swells over time and gets loose. Use the 1/8" and you will be fine, zip tie or wire every connection. For some of the best gas advice go to the Gas forum and read the sticky "gas engines for newbies" There are a whole lot of differences in set up and running a gas engine and almost nothing you learned with glow applies. The DLE engines are extremly sensitive to needle adjustment so go very easy, 1/16 of a turn means alot. I know I have 2 of them.