Hello,
We are building a K5 and have a slightly used 912uls (410 hrs) that came with a panel mounted fuel pressure gauge. We have decided we will not install an electric back up pump. My question is, if we install the panel fuel pressure gauge will this show/tell us if the mechanical fuel pump is working? Anyone running a pressure gauge w/o a backup electric pump? Is there an obvious difference in fuel pressure when the engine is running or not running and the gauge is just reading the pressure developed by the wing tanks?
Thanks in advance for any feedback.

Joe Leeman
Freedom, WI