Glad I could help!!!

The OFNA Checkvalve mod is you put the the OFNA Primer/filter between the Exhaust pressure nipple and the pressure inlet on the tank with the flow towards the tank, so now it the valve is no longer and primer pump but a checkvalve that stabilzes the pressure in the tank to solve the half tank leaning/stalling issue these larger tanks experience. I tested maybe a dozen different checkvalves, when I was just about to give up I ran across the OFNA unit and tested it for about a month before I posted the results. It is a proven solution to a very common problem. I will see if I can dig up the thread that discusses this issue in detail so you can read it in its entirety.


In Fact it is so proven that even CEN sometimes recommends this mod!!