I have notice on this forum prior some people have suggested to check the breather hose for kinks f you have an air lock situation when filling. I have located the top end of the hose of the breather which seems to share a "T" brass fitting which connects the air breather in question as well as the other auxiliary 50 gallon tank air breather. Both hoses share the one outlet vent at the rear of the boat near the transom door external of cockpit. My biggest issue is where do I locate the tank end as it is not in sight. I am trying to avoid removing the main tank to solve the problem. Main tank hold 150 gallons. I takes me approx 1 hr to fill about 50 gallons. With plenty of blowback or overflows. Can anybody help here. You will notice large tank does not have breather hose shown on top unlike smaller tank.
Fuel breather blockage Sailfish 272 1998 model
- Thread starter Kangasell
- Start date
The grey line next to the 1-1/2" line is your vent line.
You can have an issue in the thru-hull fitting (clogged up on the outside), a dip in the vent line, a clogged vent fitting, or possibly even an internally collapsed vent line (ethanol and/or age can do this). It could also be a blockage somewhere in the fill line.
If you are having no luck figuring things out, try to narrow things down. Try this: Get a length of new vent line (probably 5/8"). The next time you fill up, remove the existing vent line and attach the new one. Have someone hold it up in the air while you fill up. If you can filly up normally, you know the problem is on the vent side. If you still have problems, the issue is on the fill side.
You can have an issue in the thru-hull fitting (clogged up on the outside), a dip in the vent line, a clogged vent fitting, or possibly even an internally collapsed vent line (ethanol and/or age can do this). It could also be a blockage somewhere in the fill line.
If you are having no luck figuring things out, try to narrow things down. Try this: Get a length of new vent line (probably 5/8"). The next time you fill up, remove the existing vent line and attach the new one. Have someone hold it up in the air while you fill up. If you can filly up normally, you know the problem is on the vent side. If you still have problems, the issue is on the fill side.
That picture is confusing to me. You're saying it is showing 2 tanks there? If so, I don't see a vent hose OR a filler hose on the tank on the left. Looks to me like that is one large tank. Is the aux tank under the floor panel that's still installed? (to the right) Open the deck plate and see what's there.
Does the aux tank fill ok?
You could try removing the vent line from the tank and see if you can blow air through it towards the vent. Plenty of posts about wasp nest, mud dobbers, or just salt/corrosion the blocking screen at the exit of that vent.
Does the aux tank fill ok?
You could try removing the vent line from the tank and see if you can blow air through it towards the vent. Plenty of posts about wasp nest, mud dobbers, or just salt/corrosion the blocking screen at the exit of that vent.
i am also confused. i think that is all the main tank and there are 2 fuel return hoses from the motors. i definitely only see one filler and vent. however if problem is with main tank it does not matter.
easiest fix is to disconnect vent line from tank and attach an air line and blow it outl. if. something clears problem solved. if it has low air flow you need a new vent line. if it is already clear you can snake out the fittinginto the tank but i think you more likely have a collapsed or blocked fuel filler line.
easiest fix is to disconnect vent line from tank and attach an air line and blow it outl. if. something clears problem solved. if it has low air flow you need a new vent line. if it is already clear you can snake out the fittinginto the tank but i think you more likely have a collapsed or blocked fuel filler line.
Thank you all for assistance. I think the picture is confusing all. There are two tanks, the timber cross members covers the gap between them. They are independent from each other. The tank with the large filler tube and the grey breather hose is not an issue at all.
The left or top tank closest the cabin is the issue. I can't find or see the filler hose or the breather hose at the tank. Asking if anybody knows where they are located and if there some way to check the breather tube without removing this larger tank.There is very little room around the tanks to access to find these hoses. was hoping someone has had the same issue and could reiterate how they sorted the issue.
As mentioned I can located and access the large tank breather at the other end under the gunnel where I explained there is a " T " brass piece which is connected to the other small tank breather hose and the third side of the " T " runs off to the one vent in the hull at rear of vessel. Unfortunately I attempted to remove this hose from the large tank under the gunnel to see if I could clear this hose or blow air back to the tank, or see if there was a blockage in the " T " piece BUT the tank is completely full with fuel as is the breather hose. I guess I need to use the boat for a while and reduce the fuel first. Am I on the right track. Question- if I remove this large tank breather hose under the gunnel when tank is lower, is there a way to establish if the hose is kinked or blocked?
The left or top tank closest the cabin is the issue. I can't find or see the filler hose or the breather hose at the tank. Asking if anybody knows where they are located and if there some way to check the breather tube without removing this larger tank.There is very little room around the tanks to access to find these hoses. was hoping someone has had the same issue and could reiterate how they sorted the issue.
As mentioned I can located and access the large tank breather at the other end under the gunnel where I explained there is a " T " brass piece which is connected to the other small tank breather hose and the third side of the " T " runs off to the one vent in the hull at rear of vessel. Unfortunately I attempted to remove this hose from the large tank under the gunnel to see if I could clear this hose or blow air back to the tank, or see if there was a blockage in the " T " piece BUT the tank is completely full with fuel as is the breather hose. I guess I need to use the boat for a while and reduce the fuel first. Am I on the right track. Question- if I remove this large tank breather hose under the gunnel when tank is lower, is there a way to establish if the hose is kinked or blocked?
If you move further forward along the cockpit floor (closer to the cabin), you should find a round access plate in the floor. Pop it open (or unscrew) and you should see the fill/vent hoses. In other words, I would suspect that your forward tank continues further forward under the floor than what you see there. I've never been on a 272, but this seems to make the most sense. You might find some information in your manual, too.
I would have guessed the forward tank was a 50 gallon auxiliary. if that's just the tip of a 150 gallon tank then i guess you have to pull the aux tank and slide out the main to pull the main.
on the bright side that means there must be access somewhere to rig the main tank fill and vent line once it is in place. maybe you reach it from the rear berth inside the cabin or from inside a seat riser?
on the bright side that means there must be access somewhere to rig the main tank fill and vent line once it is in place. maybe you reach it from the rear berth inside the cabin or from inside a seat riser?
I had a similar experience on a Parker. The fuel vent was completely clogged with corrosion and salt. the hose was fine, all of the blockage was in the metal vent.
Hi fellow members. Thank you for the words of wisdom on the fuel blockage I have discovered the filler hose and breather hose at main 150 gallon tank. They were inside cabin in second berth behind panel at rear of berth. Could be a problem changing hoses as they snake under floor around a few turns. I noticed the last hose running to the breather has a loop in it. Why ? Could this be stopping air escaping when filling. I will fit another breather hose the tank and get some one the check if air escapes when I am filling. Could be a kink in hose where I can't see it. If I still have the same issue I will work on the fill side.
Wonder if a separate breather in hull would be better than sharing the other fuel tank breather hose.
Hope pics are viewable if not please advise.
Wonder if a separate breather in hull would be better than sharing the other fuel tank breather hose.
Hope pics are viewable if not please advise.
Attachments
The fill line may be kinked choked nearly closed, more likely blocked vent fitting or hose. You have access to the vent and fill line connections at the tank, take off the vent line and blow thru it. If any resistance, no go!
When fueling, I can readily hear the vents in action. Always start out slow when fueling, may have a slug of gas in either line.
When fueling, I can readily hear the vents in action. Always start out slow when fueling, may have a slug of gas in either line.
The upward loop at the thru-hull fitting is normal and required. It prevents outside water (spray) from coming in.