Yea, I'm off the check valve thought and will start trying better fuel when I get home. I'll report back the results just to finish the thread. Have heard of ether with lubricant but that would negate all the negative I've heard about it over the years. I had a mud truck that I called druggy that thing refused to start with ether back in the day, even if it sat for a half hour while someone else was in the hole I'd have to shut it. I didn't really care about that engine so I didn't care what I did to it. That is the one I would pressurize the tank on to drain it from time to time, it would pressurize to the point that you could hear the tank flex, the vent must have been stopped up with mud.

I do appreciate all the input folks.