Review on 🔍 WIX Filters - 33040 Fuel (In-Line) Filter, Complete (Pack of 1) by Ron Josey

So if you run that filter you can feel that the fuel is colder and that most of the air in the line is from the vapor lock etc. originates. Wix's tank told me there is NO Orpheus on this model, so I add a back pressure choke valve to keep the carb happy. The 1/4 return to the tank should be at the highest point of 12 o'clock as the air/vapor rises. I would add a clear line so you can see what's going on. The engine ran at full temperature on a hot day with no problems, in the past there have been problems with vapor lock