Quote:
Originally Posted by Mike S
High wing, doesnt count. 
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Ok so the test procedure I understand best is the following:
1) First, check the tank vent inlets to be sure they are clear.
2) If I'm not alone, blow air into each vents and listen for bubbles coming out of the appropriate tank. This helps to assure the vent lines are connected and operative.
3) Disconnect the fuel line to the engine, on the engine side of the firewall
4) Attach a hose from that line to a bucket
5) Measure the fuel levels in the two tanks as accurately as possible.
6) Set the tank selector to OFF.
7) Turn aux fuel pump on....no fuel (or very little) should come out of the hose into the bucket.
Question: this is ok for the pump?
8) Set fuel selector to LEFT
9) Turn on pump, for a few seconds
10) Stop pump and measure both tanks.
11) Set fuel selector to RIGHT
12) Turn on pump for a few seconds; stop pump; measure tanks.
13) Set fuel selector on BOTH
14) Turn on pump for a few seconds; stop pump; measure tanks.
This series of steps will tell me if the system is working, and also will indicate how it is plumbed.
Do I have that right?
Anything wrong or unsafe?
Thanks