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Thread: diesel bug?

  1. #31
    Join Date
    Jun 2012
    Posts
    77

    Default Re: diesel bug?

    Hi mark, could you take the fuel level gauge out and pump the old fuel from there ???in our sealine 360 there quite easy to get at , and then polish it etc ???? I’ve also heard that petrol kills diesel bug not sure if this is true , maybe drain tank and put petrol in there leave to help soften and crap on bottom of tank then re flush a few times , and take the pipe off the filter and attach your dingy pump to and reverse flush the stand pipe in the tank ,
    Nick “Bojangles”

  2. #32
    Join Date
    Mar 2004
    Posts
    6,070

    Default Re: diesel bug?

    Quote Originally Posted by Restoration man View Post
    Hi mark, could you take the fuel level gauge out and pump the old fuel from there ???in our sealine 360 there quite easy to get at , and then polish it etc ???? I’ve also heard that petrol kills diesel bug not sure if this is true , maybe drain tank and put petrol in there leave to help soften and crap on bottom of tank then re flush a few times , and take the pipe off the filter and attach your dingy pump to and reverse flush the stand pipe in the tank ,
    Nick “Bojangles”
    yes that would give you access for a hose. getting the fuel level sensor back on without leaks takes a lot of patience.

  3. #33
    Join Date
    Jul 2003
    Location
    River Itchen, Southampton
    Posts
    7,218

    Default Re: diesel bug?

    Ok update on this.

    I have dismantled and cleaned the filters.

    I have shock dosed the tanks.

    The port side pipe between the tank and the filter is still blocked.

    So I made up a line that I can connect a bike pump to to push the contaminated fuel back into the tank.

    I am up to 100 psi and it won’t budge.

    I disconnected the pump and 100psi fuel sprayed me and the engine room.

    I’ve pumped it back up to 100psi and will leave it overnight. I hope it will have a big fart eventually.

    If anyone has any other bright ideas I’d love to hear them. Getting to the bit of the tank where the pipe comes out will cause a cut in finished wood.

    I’ve cut under a drawer and can get to the sender now.

    I will read any suggestions after my shower........

  4. #34
    Join Date
    Jan 2012
    Location
    South Coast
    Posts
    5,202

    Default Re: diesel bug?

    Can you cut into the pipe closer to the tank where you can later fit a straight coupler ? Then perhaps try feeding some stiff Monel wire, or if the internal diameter is large enough perhaps some galvanised running rigging wire, into the pipe and through the blockage.
    Interested in Corvettes PM me for details of the Corvette Motorboat Association

  5. #35
    Join Date
    Jul 2003
    Location
    River Itchen, Southampton
    Posts
    7,218

    Default Re: diesel bug?

    Quote Originally Posted by superheat6k View Post
    Can you cut into the pipe closer to the tank where you can later fit a straight coupler ? Then perhaps try feeding some stiff Monel wire, or if the internal diameter is large enough perhaps some galvanised running rigging wire, into the pipe and through the blockage.
    Yes. That’s possible. Not easy but possible. Good idea - thanks!

  6. #36
    Join Date
    Nov 2002
    Location
    Colwell Bay
    Posts
    5,671

    Default Re: diesel bug?

    If 100 psi didnt blow it out I'd be looking for something other than fuel bug blockage.

  7. #37
    Join Date
    Jul 2012
    Location
    Jersey
    Posts
    785

    Default Re: diesel bug?

    This was the dip tube in my tank.

    Diptube.jpg

    Made of copper and furred up with a black substance, possibly dead bug. It was partially blocking the tube and bits would ocassionally break free and get deposited in the glass bowl of the Separ filter. I replaced it with a steel dip tube and keep the tank dosed with Grotomar 82. I gather copper is not great long term with diesel and bug - you can see the pitting in the photo below. Strangely there wasn't much grime in the tank other than a 5ml medicine spoon and some kind of soft ball thing!

    Diptubeend.jpg

    Pitteddiptube.jpg

    Fueltank.jpg

  8. #38
    Join Date
    Jul 2003
    Location
    River Itchen, Southampton
    Posts
    7,218

    Default Re: diesel bug?

    Quote Originally Posted by Keith-i View Post
    This was the dip tube in my tank.

    Diptube.jpg

    Made of copper and furred up with a black substance, possibly dead bug. It was partially blocking the tube and bits would ocassionally break free and get deposited in the glass bowl of the Separ filter. I replaced it with a steel dip tube and keep the tank dosed with Grotomar 82. I gather copper is not great long term with diesel and bug - you can see the pitting in the photo below. Strangely there wasn't much grime in the tank other than a 5ml medicine spoon and some kind of soft ball thing!

    Diptubeend.jpg

    Pitteddiptube.jpg

    Fueltank.jpg
    Copper pipes in mine which is worrying

    Good news is that it farted. Made a noise like thunder. Now a gentle press of the pump and I can hear the flow into the tank.
    Phew.
    The racor filter was leaking slightly at the middle joint under the pressure so I’ll replace that seal (did you know it’s the same seal as the lid so you get a new one with every cartridge? ) then clean the engine room.

  9. #39
    Join Date
    Jan 2009
    Location
    Stratford on Avon
    Posts
    11,210

    Default Re: diesel bug?

    Good result Mark, well done.

  10. #40
    Join Date
    Nov 2015
    Posts
    98

    Default Re: diesel bug?

    Use Chris Curtis Clean Diesel company he operates all over the south coast
    He will suck out fuel, clean out tanks of any sludge

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