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Inspecting anti siphon valve without breaking anything?

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Inspecting anti siphon valve without breaking anything?

Old 01-05-2020, 07:03 PM
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Default Inspecting anti siphon valve without breaking anything?

I'm trying to remove the valve so I can make sure it's not all gummed up, but when you put a wrench on it doesn't take much pressure to start flexing the tank. It looks like the pickup tube 90 degree fitting might be welded into the tank. Either that or it's a threaded bung welded in. The anti siphon valve isn't welded, but like I said I'm a bit nervous. Any tips?
Old 01-05-2020, 07:42 PM
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Let some liquid wrench or equiv soak on it and cross fingers. It’s 20-30 years old and quite possible to break.
Old 01-05-2020, 08:16 PM
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Originally Posted by rocksandblues View Post
Let some liquid wrench or equiv soak on it and cross fingers. It’s 20-30 years old and quite possible to break.
I find it hard to believe they would weld the pickup tube in. I think I should put the wrench on that instead and spin that off since I can get a good grip on it.
Old 01-06-2020, 01:23 AM
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Originally Posted by fishmaster273 View Post
I find it hard to believe they would weld the pickup tube in. I think I should put the wrench on that instead and spin that off since I can get a good grip on it.
I was going to change mine out, but got gun shy after seeing some botched attempts on youtube.

Attached is a video using acetone/ATF as a penetrating fluid.

Old 01-06-2020, 02:54 AM
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Yeah thats the video I watched. That's a plastic tank though. Mine is aluminum.
Old 01-06-2020, 05:31 AM
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Originally Posted by fishmaster273 View Post
I find it hard to believe they would weld the pickup tube in. I think I should put the wrench on that instead and spin that off since I can get a good grip on it.
If its the factory tank the pickup tube isn't welded in... unhook fuel line, spin pickup tube out of tank... separate anti-siphon valve from pickup tube once you have it out.... then take and unscrew the tube itself from the elbow...(you'll need pliers for this).... remove and discard screen from inside the pickup tube while you have it out.
Old 01-06-2020, 07:08 AM
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Suggestion:
you don't know if this is a problem or not, but why not find out how to test an anti-siphon valve first before making a problem that did not have to exist?
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Old 01-06-2020, 08:26 AM
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Originally Posted by LouC View Post
Suggestion:
you don't know if this is a problem or not, but why not find out how to test an anti-siphon valve first before making a problem that did not have to exist?
I need to get it off the tank first to inspect it.
Old 01-06-2020, 11:53 AM
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Originally Posted by fishmaster273 View Post
I need to get it off the tank first to inspect it.
I suspect I'm going to regret this based on my trying to offer you advice in the past.......

But what issue are you having exactly that is making you suspect a problem with the anti-siphon valve?

I can assure you that if you are running ethanol fuel that it is CLEAN unless a chunk of something solid stopped it up (unlikely)
Old 01-06-2020, 12:44 PM
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i had offered the advice weeks ago to just put a section of fuel hose into a bucket thereby not only bypassing the anti-siphon valve for testing but that you wouldnt have to disturb it on the tank

I cant tell if you are stubborn or just asking questions hoping to get an answer you like?
Old 01-06-2020, 01:10 PM
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I think he had a whining or squealing electric fuel pump suggesting some restriction in the fuel system. The problem is that there can be corrosion where it is screwed into the fuel pick up and you have to be very careful and good at getting stuff like this apart, to do it without damage.
Old 01-06-2020, 01:12 PM
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he doesnt have to touch the tank fittings at all, disconnect the inlet onto the filter ( that is currently coming from the boat's tank), connect a piece of 3/8" fuel line to the pump inlet and stick that line into a gas can
Old 01-06-2020, 01:34 PM
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You will be most likely to shear the typical aluminum ASV. I hate the things.
Old 01-06-2020, 03:18 PM
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Originally Posted by Raybo Marine NY View Post
he doesnt have to touch the tank fittings at all, disconnect the inlet onto the filter ( that is currently coming from the boat's tank), connect a piece of 3/8" fuel line to the pump inlet and stick that line into a gas can
If the original poster has any sense what so ever
​​​​​He will take this advice
If not ,he shouldn't be given any more advise as he just doesn't listen,


Old 01-06-2020, 03:25 PM
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Originally Posted by Raybo Marine NY View Post
I cant tell if you are stubborn or just asking questions hoping to get an answer you like?
Is there a difference?
Old 01-06-2020, 05:00 PM
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Originally Posted by Raybo Marine NY View Post
i had offered the advice weeks ago to just put a section of fuel hose into a bucket thereby not only bypassing the anti-siphon valve for testing but that you wouldnt have to disturb it on the tank

I cant tell if you are stubborn or just asking questions hoping to get an answer you like?
I think he's still trying to find his return line.
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Old 01-07-2020, 07:26 AM
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Originally Posted by Raybo Marine NY View Post
i had offered the advice weeks ago to just put a section of fuel hose into a bucket thereby not only bypassing the anti-siphon valve for testing but that you wouldnt have to disturb it on the tank

I cant tell if you are stubborn or just asking questions hoping to get an answer you like?
I found his earlier thread Anti siphon valve not needed if fuel lines are above the tank? Why does he keep asking the same thing over and over?
Old 01-07-2020, 07:30 AM
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He is lonely. I actually feel bad. If true and not just attention seeking he really should not be operating a boat like this. I honestly wish him luck but his lack of comprehension and ..... well he is one of those guys wondering why everything goes wrong for him.
Old 01-07-2020, 07:42 AM
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no need to pile on the guy
Old 01-07-2020, 07:49 AM
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Asking the same question my ass. The last thread was asking what the anti siphon valve was for, this one is asking for tips on how to remove it and inspect it. You guys act like everything is a peice of cake. Oh Yeah just take it off and inspect it real quick for debris. As if it's just going to come right off.(I know better) Next thing you know I'll be buying a new fuel tank because the pickup tube is all stripped out and or broken off.

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