Let me clarify, I didn't think gas was draining out of the bowl back into the fuel line. I should have been more clear. Once the fuel line is primed and gas is in the carburetor the truck runs fine and will start right up until the gas in the bowl evaporates. There is no indication it is leaking at the carb. I do have a small squirt bottle with fuel. I remove the air cleaner. Give the carb a squirt of gas, get in the cab, pull the choke, turn the key on, hit the starter. The truck starts right up. Sometimes it continues to run and sometimes it runs until it burns all the fuel I squirted into the carb and I have to repeat the procedure until the fuel line is filled back up with gas. Most times I don't have to repeat the procedure more than twice. Once it starts I leave the choke out, pull the throttle cable out slightly to increase the idle RPM and let it run for a few minutes. I then push the choke and throttle cable back in. the truck will sit and idol. If I turn it off, t starts right back up. Later in the day it will start right back up. 1-2 days later, I have to repeat the squirt bottle procedure. As stated before, if I just crank it long enough it does pump the gas into the line and will start but I don't like putting that kind of stress on the starter and battery. I did purchase an electric fuel plump I plan to add to eliminate the need for the squirt bottle. I will also perform the check valve test. I needed an excuse to buy a pressure/vacuum gauge anyway. Even though I have not seen any signs of a leak at the carb I am going to do a closer inspection. It is hard to believe the gas in the bowl is evaporating in 24 hours.
