O/K Answers to questions above. Without the engine running, but with the elect pump on, pressure max's at 4.9. The alarm (LOW FUEL PRESSURE) warning comes on at 2.2#, which is set by myself per the Rotax's min. fuel pressure. I think what happened is that I got some ice in the gascolator filter screen. The gascolator is mounted on the firewall down low, and my engine temps were declining because of the OAT at 0deg.C The elect pump forced fuel past the gascolator. The filter screen is a fairly small cylinder, approx 1" high x 3/4" diameter, with a small brass screen. The warning came on after my descent, which was faster airspeed than my climb, which combined with the wind chill factor, would have really chilled the gascolator. Thoughts?

Bruce Estes