Don't run that thing on straight omega, it is not 50/50. It contains 17% oil 70/30 syn/castor. Run the fuel suggested by O.S. in the owners manual. http://manuals.hobbico.com/osm/rotary49pi-manual.pdf

The wankel is not the same as a piston engine as far as lube requirements, at the very least, add 10-12oz of castor to that gallon of omega before you run that wankel for the first time.


BTW, the nipple on the engine is not for tank pressure, there is no tank pressure needed. Treat the nipple as a crankcase vent on a fourcycle and direct it overboard.