"The 2 line tanks of the era u
"The 2 line tanks of the era used one line to deliver fuel to the motor and the other line pushed air from the motor back to the tank in order to push the fuel back to the motor. The tanks have a push button pump to begin the pressure process before the motor is running. Close the tank cap and push the button until resistance is felt. Start the engine. After using the motor release the pressure in the tank by opening the cap and leave it cracked if tank will be exposed to sunlight. Pressurized tanks connected to the motor with the cap closed will re-pressurize if exposed to sunlight. Results in loss of fuel, at least for me. My tanks list oil/fuel mix at 1/2 pint oil to 1 gallon gas. Some say that due to the improvement in oils today older motors can safely be run at lower oil levels. Myself, I'll stick to the 24:1 since I have a history of using too little oil. Really hard on chainsaws and snowblowers! Enjoy your motor!"
