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Ed Schenck
Been watching for a response,. . .
but none are forthcoming. I wanted to see if there was some magic involved since I have the same need. I recently was towed after bad fuel caused an air-lock. I was told to remove that screen first chance I get. From studying my tank it appears the only way is to cut an inspection hole on top of the tank over the pickup. This is relatively easy to do on my H37C by removing the plywood cover in the quarterberth. Not sure about your H31. But removing the shutoff valve and removing the large nut at the tank would only let the fuel pickup fall back into the tank I think. Sure like to hear from someone who has done this.
but none are forthcoming. I wanted to see if there was some magic involved since I have the same need. I recently was towed after bad fuel caused an air-lock. I was told to remove that screen first chance I get. From studying my tank it appears the only way is to cut an inspection hole on top of the tank over the pickup. This is relatively easy to do on my H37C by removing the plywood cover in the quarterberth. Not sure about your H31. But removing the shutoff valve and removing the large nut at the tank would only let the fuel pickup fall back into the tank I think. Sure like to hear from someone who has done this.
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Andrew Benjamin
Me to.
I was hoping for some information ......... are we all sure that a filter does exist on the end of the pick up tube? I don't think I am going to do surgery on my tank until I am sure of what I am doing. I intend on having a good look this weekend. Till then
I was hoping for some information ......... are we all sure that a filter does exist on the end of the pick up tube? I don't think I am going to do surgery on my tank until I am sure of what I am doing. I intend on having a good look this weekend. Till then
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Ed Schenck
Yes, according to archives.
If you search "Forum Archives" after 12/22/99 using "tank screen" as the argument you will get a "hit" on H31. I read several of these in both archives. It seems some boats have the pickup mounted on top of the tank and it can be removed and the screen cleaned or removed. A Yanmar mechanic said my Racor filter was more than adequate to trap any and all, that I should remove the screen. I need an inspection port anyway because I want to get the tank pumped out and cleaned.
If you search "Forum Archives" after 12/22/99 using "tank screen" as the argument you will get a "hit" on H31. I read several of these in both archives. It seems some boats have the pickup mounted on top of the tank and it can be removed and the screen cleaned or removed. A Yanmar mechanic said my Racor filter was more than adequate to trap any and all, that I should remove the screen. I need an inspection port anyway because I want to get the tank pumped out and cleaned.
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Mac Lindsay
Fuel pick up tube screen H31
Frank; I had the same problem of the little screen at the end of the pick up tube being blocked. Here is what I did on advice from a mechanic. Loosen the nut at the fuel pick up tube at top of tank. Pull the tube out of the tank. Remove screen. Swear at it. Throw it away. When you are removing the nut, hld on to the top of the fitting so it won't slip away. Of course, i'll assume the fuel line is unattached and that you have turned the fuel line valve off. Carefully wiggle the tube out of the tank, remove screen and carefully put the tube back in and re tighten the nut. reattach all hoses, open valve and bleed all air from system , and you are back in business. If you haven't already a large fuel filter in line between the fuel tank and the engine, install one now. The little screen in the pick up tube serves no other purpose but to clog up and drive us nuts. That's why God and smart mechanics invented large filters for us to install. Hope you are not claustrophobic as you have little space to work. regards, Mac Lindsay 1984 H31
Frank; I had the same problem of the little screen at the end of the pick up tube being blocked. Here is what I did on advice from a mechanic. Loosen the nut at the fuel pick up tube at top of tank. Pull the tube out of the tank. Remove screen. Swear at it. Throw it away. When you are removing the nut, hld on to the top of the fitting so it won't slip away. Of course, i'll assume the fuel line is unattached and that you have turned the fuel line valve off. Carefully wiggle the tube out of the tank, remove screen and carefully put the tube back in and re tighten the nut. reattach all hoses, open valve and bleed all air from system , and you are back in business. If you haven't already a large fuel filter in line between the fuel tank and the engine, install one now. The little screen in the pick up tube serves no other purpose but to clog up and drive us nuts. That's why God and smart mechanics invented large filters for us to install. Hope you are not claustrophobic as you have little space to work. regards, Mac Lindsay 1984 H31
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Larry Morrow
Tank filter
Andrew, Mine had one, and I removed it after adding a Racor filter in-line. No big deal. Are you going on the Mini cruise this weekend with HSA #1? If so, I'll jump on board and help you. Larry
Andrew, Mine had one, and I removed it after adding a Racor filter in-line. No big deal. Are you going on the Mini cruise this weekend with HSA #1? If so, I'll jump on board and help you. Larry
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Andrew Benjamin
Larry
We may do the cruise. However I was planning to go South for at least a week. Now with this weather I have no idea what we will do. Thanks for the offer and I hope to see you at the weekend. Andrew
We may do the cruise. However I was planning to go South for at least a week. Now with this weather I have no idea what we will do. Thanks for the offer and I hope to see you at the weekend. Andrew
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Patrick Ewing
Just did mine
I took off the hose and the shut off valve and it unscrewed from the tank and lifted out. NO screen on my 91 37.5 - just a straight tube cut off at an angle about one inch above the bottom. The tank still has 2-3 gallons of fuel when the fuel pump sucks air. Please see my other post about this.
I took off the hose and the shut off valve and it unscrewed from the tank and lifted out. NO screen on my 91 37.5 - just a straight tube cut off at an angle about one inch above the bottom. The tank still has 2-3 gallons of fuel when the fuel pump sucks air. Please see my other post about this.
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Frank Pratt
Thanks
Thanks for all the comments went to the boat this weekend and cleaned the fuel lines from tank to the injectors.
Thanks for all the comments went to the boat this weekend and cleaned the fuel lines from tank to the injectors.
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Jim
Just blow it clean
Unless you are going to remove the tank and clean it, there is no point in trying to remove the tube. I disconnected the fuel line at the primary filter and blew threw the fuel line to force air threw the screen, [if there is one]. In addition I healed the boat over by tying the main halyard to the dock and winched it over to the side of the fuel fill pipe. I then removed the fill hose at the tank and pumped out the tank by getting the pump hose down into the lowest corner. I had originally tried to remove the fuel pick-up but it wouldn't turn loose and I didn't want to break it.
Unless you are going to remove the tank and clean it, there is no point in trying to remove the tube. I disconnected the fuel line at the primary filter and blew threw the fuel line to force air threw the screen, [if there is one]. In addition I healed the boat over by tying the main halyard to the dock and winched it over to the side of the fuel fill pipe. I then removed the fill hose at the tank and pumped out the tank by getting the pump hose down into the lowest corner. I had originally tried to remove the fuel pick-up but it wouldn't turn loose and I didn't want to break it.
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Rafi
It can be a tricky job
to remove the pickup tube unless you have specific instructions. I struggled with this issue for months, and could not get specific instructions, until I wrote to Don Alexander in the UK who had a posting on this site, and he sent me specific instructions by e-mail. THANKS DON !!!! So I am sharing this valuable info with you: Firstly my tank is made from a buff coloured plastic material and looks as if it is a moulded construction. There are several fuel outlets in the top surface and the main feed to the engine is via a cube of aluminium about 5/8" along each side. This has a male thread at the bottom which is screwed into an aluminium bush in the tank top. There is a thin aluminium nut on the top of the bush in the tank so I presume that the bush is screwed into the tank and this is its lock nut. Alternatively the bush may have a flange on the inside of the tank having been moulded in-situ. Either way it makes no difference. Projecting from the side of this aluminium cube is another tube which carries the fuel tap and this has a rubber tube which leads to the water filter/separator in the engine compartment. When I took mine apart it was very stiff. First I disconnected the flexible hose from the tap and then I attempted to hold the thin nut with a spanner and simply unwound the cube plus tap from the bush using another spanner directly on the cube. (Note by Rafi: you may need to remove the tap first so it does not prevent the aluminum cube from turning freely and hitting the wall. I had to use exessive force to free the cube, it was probably there since it was installed by the factory. At the end it gave in, and the cube came out with the flexible hose attached to it, and the damn screen at its end) From memory it is a taper thread rather like those used on domestic gas fittings. Underneath the cube there is a 1/2" clear plastic pipe with the offending strainer at the bottom. This is a cylinder of finely perforated stainless sheet with the bottom end closed off. It appears to have been heat sealed over the end of the dip tube. I hope this answers your questions and I wish you luck in your endeavours.
to remove the pickup tube unless you have specific instructions. I struggled with this issue for months, and could not get specific instructions, until I wrote to Don Alexander in the UK who had a posting on this site, and he sent me specific instructions by e-mail. THANKS DON !!!! So I am sharing this valuable info with you: Firstly my tank is made from a buff coloured plastic material and looks as if it is a moulded construction. There are several fuel outlets in the top surface and the main feed to the engine is via a cube of aluminium about 5/8" along each side. This has a male thread at the bottom which is screwed into an aluminium bush in the tank top. There is a thin aluminium nut on the top of the bush in the tank so I presume that the bush is screwed into the tank and this is its lock nut. Alternatively the bush may have a flange on the inside of the tank having been moulded in-situ. Either way it makes no difference. Projecting from the side of this aluminium cube is another tube which carries the fuel tap and this has a rubber tube which leads to the water filter/separator in the engine compartment. When I took mine apart it was very stiff. First I disconnected the flexible hose from the tap and then I attempted to hold the thin nut with a spanner and simply unwound the cube plus tap from the bush using another spanner directly on the cube. (Note by Rafi: you may need to remove the tap first so it does not prevent the aluminum cube from turning freely and hitting the wall. I had to use exessive force to free the cube, it was probably there since it was installed by the factory. At the end it gave in, and the cube came out with the flexible hose attached to it, and the damn screen at its end) From memory it is a taper thread rather like those used on domestic gas fittings. Underneath the cube there is a 1/2" clear plastic pipe with the offending strainer at the bottom. This is a cylinder of finely perforated stainless sheet with the bottom end closed off. It appears to have been heat sealed over the end of the dip tube. I hope this answers your questions and I wish you luck in your endeavours.
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