Just experienced a failed mechanical fuel fuel pump discovered at a fuel stop at a relatively remote field.
The pump still made good pressure but the leak rate was way too much to fly it.
Turns out that the KB fittings that most of us use to route the in/out fuel lines into the pump have the same 9/16-18 threads on both ends. Remove this fitting from the pump and it can be used to connect the in/out lines together, “jumpering out” a leaking mechanical pump.
You can then make it to civilization using the boost pump to fly, assuming you have a reliable electric boost pump.
Hope this helps someone in a jam.
The pump still made good pressure but the leak rate was way too much to fly it.
Turns out that the KB fittings that most of us use to route the in/out fuel lines into the pump have the same 9/16-18 threads on both ends. Remove this fitting from the pump and it can be used to connect the in/out lines together, “jumpering out” a leaking mechanical pump.
You can then make it to civilization using the boost pump to fly, assuming you have a reliable electric boost pump.
Hope this helps someone in a jam.