av8tor1977: The Supertiger 90 carb was just a thing I wanted to try. Not because I like em better than a walbro. Regular glow carbs have a advantage in some ways. They can pass more fuel without messing with the innards of a more complex carb. No diaphragms to go bad from different types of fuel I am going to try. Walbro with pump to deliver fuel looks like the easy way out. The gas/glow test is next (but before I do that) have you ever just mixed 1 part of glow fuel to 2 parts of strait alcohol? If so what was the RPM? It looks like the price of alky may be the same or less than gas!! Capt,n