8.1 Fuel drains continuously when changing filter

R-and-R

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May 9, 2018
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When changing my filters I typically get a few ounces of fuel spillage. Enough that I can catch it with a small container and shop towels.

But on my most recent change on my port motor, the fuel practically gushed continuously until I could get the new filter spun on. Engine switch was definitely in the Off position, so fuel pump was not powered.

I'm thinking maybe the fuel shutoff valve from the tank is stuck open?
Any ideas how to test?
Or other problems to look for?
 
Quite possible if you have the electric valves. Could be the anti-siphon valve if you have the older setup

I think you already tested it, and it's open.
 
When changing my filters I typically get a few ounces of fuel spillage. Enough that I can catch it with a small container and shop towels.

But on my most recent change on my port motor, the fuel practically gushed continuously until I could get the new filter spun on. Engine switch was definitely in the Off position, so fuel pump was not powered.

I'm thinking maybe the fuel shutoff valve from the tank is stuck open?
Any ideas how to test?
Or other problems to look for?
The original Parker Hanafin anti-siphon valves on my boat have a knurled knob that can be turned to ‘bypass’. If this is done and you don’t break the siphon, I could see how you’d see continuous fuel flow assuming your tank is higher the the hose end.
 
The original Parker Hanafin anti-siphon valves on my boat have a knurled knob that can be turned to ‘bypass’. If this is done and you don’t break the siphon, I could see how you’d see continuous fuel flow assuming your tank is higher the the hose end.

Is this the valve we’re talking about?

I can turn the knob manually, but it doesn’t move when I turn the ignition on and off. Should it?

9E7524D1-BD93-4B44-A0AD-6EBD1806E759.jpeg
 
Yes, that is the valve. The knob is only moved manually. It provides an override in case the valve fails in the closed (non-energized) position.

If you look (very) closely, the words “normal” and “bypass” are engraved on the valve body and there is a arrow (not to be confused with the slot) on the knob itself to indicate where the knob is currently positioned.

In normal mode, 12vdc opens the valve, closes with no voltage. In override, valve is always open (physically manipulated via the knob).
 
Thanks guys.

I was suspicious of that valve. Good to have some confirmation before I replace it.
 
Thanks guys.

I was suspicious of that valve. Good to have some confirmation before I replace it.
Do you believe it has failed? Normally, the failed mode is closed and you get no fuel flow. I don’t think they fail open which is why I was suggesting verifying that it’s simply not in bypass mode.

If it has indeed failed, you may have issues finding a replacement, unless going through a SR dealer. I found the part numbers on the valves to be mostly decipherable using old PH literature but there were some elements of the number that appeared to be custom to SR and thus couldn’t determine their meaning/spec.

I was able to determine my valve did not need replacement...
 
Do you believe it has failed? Normally, the failed mode is closed and you get no fuel flow. I don’t think they fail open which is why I was suggesting verifying that it’s simply not in bypass mode.

If it has indeed failed, you may have issues finding a replacement, unless going through a SR dealer. I found the part numbers on the valves to be mostly decipherable using old PH literature but there were some elements of the number that appeared to be custom to SR and thus couldn’t determine their meaning/spec.

I was able to determine my valve did not need replacement...

Now that you mention it, I need to recheck the position of the manual knob. It may have been in the Bypass position.
Do you have a cross reference number for Parker V5C72120?
 
Now that you mention it, I need to recheck the position of the manual knob. It may have been in the Bypass position.

Hi - was that the problem? Were you able to fix it?
 
Hi - was that the problem? Were you able to fix it?

I'm not certain yet.
I think one of the two valves was in the wrong position. But I haven't had to change my fuel filters, so I don't know for certain if that was the problem.
 
Hi - was that the problem? Were you able to fix it?

I'm not certain yet.
I think one of the two valves was in the wrong position. But I haven't had to change my fuel filters, so I don't know for certain if that was the problem.
 
Hi - was that the problem? Were you able to fix it?

I'm not certain yet.
I think one of the two valves was in the wrong position. But I haven't had to change my fuel filters, so I don't know for certain if that was the problem.
 

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