Fuel Pressure Low
in 912 / 914 Technical Questions
11 years ago
I just completed my maiden flight in my Kitfox with a 912ULS. It is a new recent engine purchased in 2012 with the latest fuel pump installed. I also have the fuel bypass return option installed. The fuel pressure sensor is a Kavlico purchased with the Rotax 912 sensor kit from Dynon. My pressure readout is on my Dynon Skyview screen. The aircraft is of course a high wing with tanks in the wings and gravity flow to the inlet of the engine driven fuel pump. I do NOT have an auxilliary electric fuel pump.
Everything ran fine on the maiden flight, but during WOT climbs the fuel pressure would hover around the low pressure redline (2.2 psi). As soon as I leveled out in cruise it would be in the green at 4.0 to 5.0 psi. At idle to 2000 rpm it climbs to 6.5 to 7.2 psi. Should I be worried or is this range of pressures normal?
Jim
Everything ran fine on the maiden flight, but during WOT climbs the fuel pressure would hover around the low pressure redline (2.2 psi). As soon as I leveled out in cruise it would be in the green at 4.0 to 5.0 psi. At idle to 2000 rpm it climbs to 6.5 to 7.2 psi. Should I be worried or is this range of pressures normal?
Jim
