So after using this setup, I have two questions for those of you who have operated their pressurized tank with a fuel pump, while using your return air line as a return fuel line.
Do I need to loosen the fuel cap on the tank when I run the motor?
There is no vent on the fuel tank, so I was curious. I tried closing the cap and letting the motor idle for a few minutes, but it didn’t die. I was wondering if perhaps enough air and fuel was coming back in through the return fuel line, that I didn’t need to crack the cap open? I assume that if I run the motor at full throttle, it would probably die…?
Just curious if I should make a habit of unscrewing the gas cap a bit when running the motor or not.
Should I bother worrying about the gas/oil mixture as I get to the bottom of the tank? If so, what do I do about it?
I understand that the return fuel will be a bit rich in oil vs my original mix. The motor calls for 16:1, and I have ready most everywhere that 24:1 is fine. At 24:1, the motor is still smoking while idling out of the marina, so I assume it is getting plenty of oil. If I just never dump the excess oil out, I assume that I will just be running with more oil than 24:1, and that’s fine. Maybe the bottom of the barrel will be 16:1, and when I fill it back up it will go back to 24:1. Close enough? I use an electric motor for trolling, so this motor will typically only be used at higher RPMs, so more oil seems fine to me. Just making sure that my thought process is on track here.
Thanks!
