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Earliest time to test-run fuel pumps?

ymc9

ymc9

Well Known Member
Patron
I've mostly finished laying out the main electrical harness, and thought now could the good time to test-run the pumps with real mogas and a bench PSU. Engine is not installed yet. I believe I can make a loop at the engine-side fittings, add probably 2 gallons of fuel, and then power on the pumps and let them run briefly. Anything extra caution I should take? Thanks!
 
Btw, the fuel lines have been pressure-tested (with air) during the plumbing phase and there was no leak. Tail cone is not installed so I can still easily access the pumps now.
 
Great idea! I’d do it now, before anything else obstructs the tunnel. And you only need 1 gallon (or less) of fuel.
 
ymc9 said:
I've mostly finished laying out the main electrical harness, and thought now could the good time to test-run the pumps with real mogas and a bench PSU. Engine is not installed yet. I believe I can make a loop at the engine-side fittings, add probably 2 gallons of fuel, and then power on the pumps and let them run briefly. Anything extra caution I should take? Thanks!
Click to expand...
This is what I did. It was a good functional test of the system with fuel.
 
ymc9 said:
I don't have the battery installed yet. Do you mean it's safer to run the test with the battery rather than a bench PSU?
Click to expand...
Any 12v battery will do. PSU's (switching power supplies) can act funny with certain loads.
 
Contact your pump manufacturer and ask about pickling the pump after the test. My pump was installed during the finishing kit phase then sat till the AWC prep testing. I was all set to test fuel flow. "Click". Nada. Don told me they don't like to sit. I had to send it in to be overhauled. Didn't cost much except time.
 
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