Leaking Fuel Tank

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   We have diesel pooling around the bottom of the fuel tank in the starboard rear cabin I have tied tissues round all of the inlets to the fuel tank with no evidence of leakage there. We will have to drain remove and inspect the fuel tank.
Has anyone had a problem like this and is there any recommended procedure for repair, or is it a replacement job?

Thanks

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blackswan Members Profile Send Private Message Find Members Posts Add to Buddy List Lieutenant Joined: 25 January 2016 Location: Australia Status: Offline Points: 29	Post Options Post Reply Quote blackswan Report Post Thanks(0) Quote Reply Topic: Leaking Fuel Tank Posted: 17 November 2018 at 08:47
	We have diesel pooling around the bottom of the fuel tank in the starboard rear cabin I have tied tissues round all of the inlets to the fuel tank with no evidence of leakage there. We will have to drain remove and inspect the fuel tank. Has anyone had a problem like this and is there any recommended procedure for repair, or is it a replacement job? Thanks

Captain Cook Members Profile Send Private Message Find Members Posts Add to Buddy List Admiral Joined: 23 May 2006 Location: Denmark Status: Offline Points: 1245	Post Options Post Reply Quote Captain Cook Report Post Thanks(0) Quote Reply Posted: 17 November 2018 at 11:44
	I had a problem with the diesel/water filter. When I changed the filter cartridge, I did not realise, that the cartridge was a couple of millimeters too short, so the glass-bottom could not be screwed tight enough towards the filter. The bolt was simply too long. At first (with 1/4 tank diesel) nothing happened. When I later filled the diesel tank the fuel leaked alround the gasket. I discovered this too late, and had a lot of fun cleaning the sump of bad-smelling diesel. My solution to the problem was to place two stainless washers on the base of the bolt, so the glass-bottom was real tight with the filter. The replacement filter was an original Yanmar spare part, so this ought not to have happened. Edited by Captain Cook - 10 June 2022 at 16:42
	Freya H400 #27 (2006),2-cabin, 40HP 3JH4E, 3-blade Flexofold, Aries LiftUp Windvane, Exturn 300, Jefa DD1,Simrad NX40,Icom M603(VHF)+M802(SSB)

S&J Members Profile Send Private Message Find Members Posts Add to Buddy List Admiral Joined: 30 August 2014 Location: Perth WA / Med Status: Offline Points: 1371	Post Options Post Reply Quote S&J Report Post Thanks(0) Quote Reply Posted: 17 November 2018 at 12:24
	This was my problem too. I think the fuel filter is much more likely to be the cause than the tank itself. In my case, adding a fibre washer to the bolt holding the bowl onto the filter resolved the issue.
	H458 #159 Primal Mediterranean cruising

Mark_J1 Members Profile Send Private Message Find Members Posts Add to Buddy List Rear Admiral Joined: 12 March 2013 Location: Dover&Medway UK Status: Offline Points: 690	Post Options Post Reply Quote Mark_J1 Report Post Thanks(1) Quote Reply Posted: 17 November 2018 at 12:46
	Not sure what era your tank is from. The tank seems to have been similarly positioned from 2005 well into 2011. However my photos in this post of the tank internals http://www.myhanse.com/inside-of-the-fuel-tank_topic10119.html may help you. The tank is pretty well constructed. Mark
	Hanse 400e "Grey Goose" Hull #31

blackswan Members Profile Send Private Message Find Members Posts Add to Buddy List Lieutenant Joined: 25 January 2016 Location: Australia Status: Offline Points: 29	Post Options Post Reply Quote blackswan Report Post Thanks(0) Quote Reply Posted: 17 November 2018 at 22:34
	Thanks guys, I see that you have a steel tank, ours is grey plastic. We also suffered from debris and sikkaflex in our tank blocking the fuel flow to the engine after fitting of the heater. Do any others have the plastic tanks? I guess I'll repeat the exercise with the tissues then take the tank out for inspection

kipwrite Members Profile Send Private Message Find Members Posts Add to Buddy List Commadore Joined: 14 October 2015 Location: New York Status: Offline Points: 495	Post Options Post Reply Quote kipwrite Report Post Thanks(0) Quote Reply Posted: 17 November 2018 at 23:52
	My 505 from 2016 has a white plastic tank. It developed a leak from the sending unit gasket, that was only evident when it was completely full. Fixed by tightening the sending unit fitting screws. Hasn’t leaked since.
	Kipwrite

Fendant Members Profile Send Private Message Find Members Posts Add to Buddy List Admiral Joined: 03 November 2012 Location: Switzerland Status: Offline Points: 1671	Post Options Post Reply Quote Fendant Report Post Thanks(0) Quote Reply Posted: 18 November 2018 at 08:46
	Hi Kipwrite, are you sure that the fuel tank is made out of white plastic ? Imho the material for fuel is a multilayer black plastic tank (PE). The multilayer technology during the blow molding process prevents the diesel smell and organic components evaporation, especially at higher temperatures. I also had problems with the gasket around the tank flange, caused by overfill. I decided to only fill it to 90% and replace the crappy Hanse sensor by a drop-in interchangeable reliable magnetic fuel sensor. White is the only approved PE food grade for the fresh water tank.
	Frank

Koppiekrou Members Profile Send Private Message Find Members Posts Add to Buddy List Captain Joined: 21 February 2018 Location: The Netherlands Status: Offline Points: 185	Post Options Post Reply Quote Koppiekrou Report Post Thanks(0) Quote Reply Posted: 18 November 2018 at 10:12
	Hi Fendant/Frank, Can you tell me what make and typeno. you’ve bought to change the crappy fuelgauge? Thank you, Frank
	291 4Ever - 341 Eternal Flame and now a Hanse 371 '05 Karma - Shoal draft - 2 cabin - 40hp - Variprofile

kipwrite Members Profile Send Private Message Find Members Posts Add to Buddy List Commadore Joined: 14 October 2015 Location: New York Status: Offline Points: 495	Post Options Post Reply Quote kipwrite Report Post Thanks(0) Quote Reply Posted: 18 November 2018 at 11:32
	Interesting. My diesel tanks are definitely made from a white plastic. I’ll check to see if they appear to be the same material as the water tanks. No issues with diesel smell.
	Kipwrite

Fendant Members Profile Send Private Message Find Members Posts Add to Buddy List Admiral Joined: 03 November 2012 Location: Switzerland Status: Offline Points: 1671	Post Options Post Reply Quote Fendant Report Post Thanks(0) Quote Reply Posted: 18 November 2018 at 12:05
	@Kipwrite: Just saw that you are based in the US. They could have different standards for fuel tanks. You can mitigate the diesel smell permeation by chosing thicker tank walls @ Koppiekrou: I bought mine from www.philippi-online.de. The model is called TGT, it comes in several lengths, starting at 200 mm. You have to measure your tank height to select. An alternative is www.wema.no. Edited by Fendant - 18 November 2018 at 12:11
	Frank



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