InsideTrader
Well-Known Member
- Joined
- Jan 13, 2016
- Messages
- 51
- Reaction score
- 1
I have owned my 235 for 1 year now and when I use the engine driven fuel pump only, my fuel pressure gets closer to the lower side of the green arc the higher the power setting. So low in fact that I always use the electric when climbing. I wait until I am trimmed out at a 65% power cruise before I turn the electric pump off. On my most recent flight, when I turned off the electric pump, my fuel pressure got low enough that the needle fell to zero. The engine never complained at all and if not for the pressure gauge, I would never have suspected a thing. I turned on the electric and the pressure normalized. I turned it off again and the pressure stayed at the bottom of the green arc but the fuel flow fluctuated a full 3 gallons per hour back and forth. Eventually the fuel flow stabilized and the pressure started to climb. (throttle mixture and prop were not touched). I was told that my engine driven pump might be at the end of its life and since I have a January annual, I should replace it. However, I wanted to get the second opinion of this forum. 
Also, how much of a pain is it to swap an engine driven pump? The pump itself is not going to cause my bank account too much pain but is this closer to a 1 hour job or an 8 hour job for a mechanic?
I appreciate all input, help, and advice as always.
Also, how much of a pain is it to swap an engine driven pump? The pump itself is not going to cause my bank account too much pain but is this closer to a 1 hour job or an 8 hour job for a mechanic?
I appreciate all input, help, and advice as always.
