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Leaking diesel fuel tank

uswa174 All Messages By This Member #373 Have any of you replaced your fuel tank? Did you replace the tank with a plastic or aluminum? If you have done this job, can the tank be removed through the lazarette (I haven't measured mine yet)? How big of a job did the replacement end up to be? I am fairly sure that I have a minute leak on the bottom of my aluminum fuel tank, which holds about 8 gallons. The tank is located on the centerline of the boat, just aft of the shaft. It is fixed to a plywood platform that spans the shallow "V" of the bilge in that area. There is a very small gap between the bottom of the tank and the platform, and I keep finding fuel there. After sailing, I also end up with a very small amount of fuel in the bilge, presumably because the boat "works" and the tank flexes a bit, releasing the diesel fuel. Thanks for any advice you can give me. ___________________ Dave S. s/v Clio 1987 S2 27, hull #80
Mark Swart #374 Dave, I too have the inboard diesel, I'd be surprised if my tank would come out through the lazarette. I'm pretty sure it could come out from the front if you took the engine out (ugh). I'm guessing it was put in before the deck was put in place. Some other possibilities to think about other than the tank: inspect and replace all of the hoses (tank fill, vent, and mine has the a primary fuel filter mounted back by the tank as well.) The hoses dry rot over time, if you have a full tank or are heeled a lot it could cause fuel to leak if they are compromised. Could even be something as simple as a hose clamp that isn't on good.? -Mark
uswa174 All Messages By This Member #375 Mark, Thanks for your response. My fuel tank was manufactured by Florida Marine Tanks, and it measures 14" length x 14" width x 10" height, with a stub out for the fuel filler opening at 1.5" on the height. The opening for the lazarette is 12", so it should JUST come out of the boat that way. I took your advice and checked all of the hoses and their connectionsfor leaks, and there is no sign of a problem there. I should be good to go on the tank replacement. ___________________ Dave S. s/v Clio 1987 S2 27, hull #80 toggle quoted message Show quoted text --- In s227classassociation@..., Mark Swart <mark_swart@...> wrote: Dave, I too have the inboard diesel, I'd be surprised if my tank would come out through the lazarette. I'm pretty sure it could come out from the front if you took the engine out (ugh). I'm guessing it was put in before the deck was put in place. Some other possibilities to think about other than the tank: inspect and replace all of the hoses (tank fill, vent, and mine has the a primary fuel filter mounted back by the tank as well.) The hoses dry rot over time, if you have a full tank or are heeled a lot it could cause fuel to leak if they are compromised. Could even be something as simple as a hose clamp that isn't on good.? -Mark
Mark Swart #376 Dave -- that's definitely good news for all of us (some day) if they had the forethought to make it small enough to come out through the lazarette! Are you going to try and have that tank repaired, or replace it?
uswa174 All Messages By This Member #377 Given what is stated on the tank manufacturer's website FAQ, <>, I will replace the tank. Since this is the first of potentially many other leaks, I might as well solve the problem as permanently as possible. I only want to do this job once! A neighbor on the dock suggested that I repair the tank with J-B Weld...I'm not sure that is a good idea. Another suggestion was to take it to a local welding shop for repair. Here's what they say on the FAQ: "Is my tank repairable? FMT does not recommend repairing tanks." "My tank has corrosion. What can I do? Once corrosion has started, it can not be stopped. FMT recommends a replacement tank." Cheers! ___________________ Dave S. s/v Clio 1987 S2 27, hull #80 toggle quoted message Show quoted text --- In s227classassociation@..., Mark Swart <mark_swart@...> wrote: Dave -- that's definitely good news for all of us (some day) if they had the forethought to make it small enough to come out through the lazarette! Are you going to try and have that tank repaired, or replace it?
s227classassociation All Messages By This Member #378 the one area where I am NOT leaking is the fuel tank....as the P.O replaced the tank when they installed the new engine in 2006... BTW - is there a petcock at the bottom of the tank that may be leaking? toggle quoted message Show quoted text --- In s227classassociation@..., Mark Swart <mark_swart@...> wrote: Dave -- that's definitely good news for all of us (some day) if they had the forethought to make it small enough to come out through the lazarette! Are you going to try and have that tank repaired, or replace it?
s227classassociation All Messages By This Member #379 Dave - did S2 OEM tanks from Florida Marine? toggle quoted message Show quoted text --- In s227classassociation@..., "uswa174" <uswa174@...> wrote: Given what is stated on the tank manufacturer's website FAQ, <>, I will replace the tank. Since this is the first of potentially many other leaks, I might as well solve the problem as permanently as possible. I only want to do this job once! A neighbor on the dock suggested that I repair the tank with J-B Weld...I'm not sure that is a good idea. Another suggestion was to take it to a local welding shop for repair. Here's what they say on the FAQ: "Is my tank repairable? FMT does not recommend repairing tanks." "My tank has corrosion. What can I do? Once corrosion has started, it can not be stopped. FMT recommends a replacement tank." Cheers! ___________________ Dave S. s/v Clio 1987 S2 27, hull #80 --- In s227classassociation@..., Mark Swart <mark_swart@> wrote: Dave -- that's definitely good news for all of us (some day) if they had the forethought to make it small enough to come out through the lazarette! Are you going to try and have that tank repaired, or replace it?
uswa174 All Messages By This Member #380 I don't know for sure, but is seems so (well, at least for my boat) since the model number on the tank's label is FMT-8-S2, and it has a November '86 manufacture date stamped on it (my boat is an '87). The tank is 8 gallons, and was manufactured from 5052 aluminum. I just sent FMT an email for a price quote on a new tank. I'll let you know how pricey it is when I hear back from them. toggle quoted message Show quoted text --- In s227classassociation@..., "s227classassociation" <rperret@...> wrote: Dave - did S2 OEM tanks from Florida Marine? --- In s227classassociation@..., "uswa174" <uswa174@> wrote: Given what is stated on the tank manufacturer's website FAQ, <>, I will replace the tank. Since this is the first of potentially many other leaks, I might as well solve the problem as permanently as possible. I only want to do this job once! A neighbor on the dock suggested that I repair the tank with J-B Weld...I'm not sure that is a good idea. Another suggestion was to take it to a local welding shop for repair. Here's what they say on the FAQ: "Is my tank repairable? FMT does not recommend repairing tanks." "My tank has corrosion. What can I do? Once corrosion has started, it can not be stopped. FMT recommends a replacement tank." Cheers! ___________________ Dave S. s/v Clio 1987 S2 27, hull #80 --- In s227classassociation@..., Mark Swart <mark_swart@> wrote: Dave -- that's definitely good news for all of us (some day) if they had the forethought to make it small enough to come out through the lazarette! Are you going to try and have that tank repaired, or replace it?
uswa174 All Messages By This Member #381 No petcock on the bottom, unfortunately... I'll post some pictures of my tank in the photo section. toggle quoted message Show quoted text --- In s227classassociation@..., "s227classassociation" <rperret@...> wrote: the one area where I am NOT leaking is the fuel tank....as the P.O replaced the tank when they installed the new engine in 2006... BTW - is there a petcock at the bottom of the tank that may be leaking? --- In s227classassociation@..., Mark Swart <mark_swart@> wrote: Dave -- that's definitely good news for all of us (some day) if they had the forethought to make it small enough to come out through the lazarette! Are you going to try and have that tank repaired, or replace it?
uswa174 All Messages By This Member #382 Just heard today from the OEM supplier, Florida Marine Tanks...of course, they don't stock the tank (I accept that...the boat is 25 years old, after all), but a newly fabricated tank will take 5-6 weeks (which takes me well beyond half the season at this point) and at a cost of $450 plus shipping. Seriously? $450 for an 8 gallon aluminum tank? In spite of what they say on their FAQ, I'm going to look for a welder of aluminum in my neighborhood. toggle quoted message Show quoted text --- In s227classassociation@..., "uswa174" <uswa174@...> wrote: No petcock on the bottom, unfortunately... I'll post some pictures of my tank in the photo section. --- In s227classassociation@..., "s227classassociation" <rperret@> wrote: the one area where I am NOT leaking is the fuel tank....as the P.O replaced the tank when they installed the new engine in 2006... BTW - is there a petcock at the bottom of the tank that may be leaking? --- In s227classassociation@..., Mark Swart <mark_swart@> wrote: Dave -- that's definitely good news for all of us (some day) if they had the forethought to make it small enough to come out through the lazarette! Are you going to try and have that tank repaired, or replace it?

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