Which one is it?

[j_k_bisson]

Which one is the anti siphon valve? Here is a pic of the top of the tank.



The hose on the left is the vent tube. The big hose is the fill tube. And the small one the right is the one to the motor. Do I take the one to the motor off and clean it? What do I use to clean it? And disassembly suggestions?

 

[Chris1956]

Re: Which one is it?

Tanks can be different, however, start by unscrewing the brass fitting attached to the fuel line. If it is the A-S valve, it will have a ball and spring. Replace with a plain 3/8" hose barb.

 

[LongLine]

Re: Which one is it?

The one with the arrow is the A-S valve. I believe the CG requires it on tanks like this. Cheap enough to replace rather than clean. I know I had a small leak develop in my hose & was glad I had one.

Tom B.
(LongLine)

 

[j_k_bisson]

Re: Which one is it?

Well took apart and inspected the tank's possible anti-siphon valve. Well my Bayliner Trophy 1991 does not have that mistery valve. Here are the pics to prove it.









I checked the flow by blowing in both directions and there was no restricions at all.

 

[LongLine]

Re: Which one is it?

Yep...you don't have one. The A-S valve will be exactly the same size as the fitting in your last pic. Difference being there will be a little ball between the o-ring and the seat.

If I were you I'd keep a real good eye on my fuel hoses.

Tom B.
(LongLine)

 

[j_k_bisson]

Re: Which one is it?

What would I be looking for? What to watch out for?

 

[LongLine]

Re: Which one is it?

Leaks. The A-S won't cause a leak but will be a big help in preventing one from becoming a disaster.

Tom B.
(LongLine)

 

[rodbolt]

Re: Which one is it?

if any part of the fuel system drops below the level of the tank an AS valve is a USCG requirement.

 

[j_k_bisson]

Re: Which one is it?

if any part of the fuel system drops below the level of the tank an AS valve is a USCG requirement.

Ok but I boat in Canada, what is the Canadian Coast Guard requirement? Also was this requirement in place back in 1991 when the boat was made? Because I did not remove anything. It's all factory.