Fuel siphon

[POGE]

cut some 3/8 hose then conected to end of primer bulb in bildge after running hose up through drain plug. I then added and old primer bulb I had lay'n around to another section to get siphon going. Worked well. Does this confirm I dont have a anti siphon valve on my tank ?

 

[DaleH]

I would say no it didn't confirm it, as that added primer bulb could have created the suction to open the anti-siphon valve which prevents "free draining".

Best and only way to check it is to remove and inspect the fuel fitting to the pickup boss on the tank.

 

[windknotnc]

An easier way is to blow air with a compressor into the fuel line above the tank and see if it blows air into the tank or it stops. If air blows freely there is no anti siphon valve.

 

[POGE]

Thanks for both replies, very helpful as always. Will inspect and try compressor idea. Update: It wss the vaccum created, tank will not "free" leak fuel.

For any GI Doc's/RN's out there this picture could also be titled "Parker gets endoscope inspection"

 

[jeffnick]

My tank would not continue to siphon once the bulb was not squeezed. It siphoned fine with the anti-siphon valve removed. I'd say either you don't have one or it's stuck OPEN. I drained a tank with an anti-siphon valve by using a vacuum system.
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