Page 2 of 6 FirstFirst 123456 LastLast
Results 11 to 20 of 54

Thread: diesel bug?

  1. #11
    Join Date
    Jul 2003
    Location
    River Itchen, Southampton
    Posts
    7,218

    Default Re: diesel bug?

    Quote Originally Posted by masterofnone View Post
    Hi Mark, I had a prob recently, purchased a lucas/ su fuel pump replacement, connected after fuel filters , pumped all fuel out thru filters. changed filters. dosed fuel, refuelled. thx Richard
    Hey - how are you - I remember you changing filters many times on a very long and very bumpy trip back from Cherbourg! You must have a thing with diesel.

    Thanks for your reply and to all the other replies too - all good food for thought.

    This seems like a good plan - after all it must be what the pros do.

    I’m worried though it might be other crap in the tank, not bug, as others have suggested/experienced.

    The tanks are aluminium so no rust thankfully.

    I think i overdose then polish at least I know that’s not the problem.

    Next step is to cut an inspection hatch in the tank.

    As it’s an aft cabin boat the thought of getting the engines out to get the tanks out fills me with dread.

    I’ve heard of people cutting the hull sides out to get them out and repairing that. Please no!!

  2. #12
    Join Date
    Nov 2009
    Location
    North East Hampshire
    Posts
    615

    Default Re: diesel bug?

    My next boat will be diesel and have often wandered how to avoid fuel contamination.
    Are the Racor turbine filters worth considering? Advantages of a glass inspection bowl and three stages of filtering.

  3. #13
    Join Date
    Jul 2003
    Location
    River Itchen, Southampton
    Posts
    7,218

    Default Re: diesel bug?

    Quote Originally Posted by russ View Post
    My next boat will be diesel and have often wandered how to avoid fuel contamination.
    Are the Racor turbine filters worth considering? Advantages of a glass inspection bowl and three stages of filtering.
    I have these. The blockage is before the filters.

  4. #14
    Join Date
    Jan 2011
    Location
    Gillingham(Dorset) Boat East Cowes
    Posts
    2,691

    Default Re: diesel bug?

    Had I known you were in Cowes I'd have invited myself round

  5. #15
    Join Date
    Jul 2003
    Location
    River Itchen, Southampton
    Posts
    7,218

    Default Re: diesel bug?

    Quote Originally Posted by colhel View Post
    Had I known you were in Cowes I'd have invited myself round
    went to the Folly and finding a table was not a problem!

  6. #16
    Join Date
    Nov 2009
    Location
    North East Hampshire
    Posts
    615

    Default Re: diesel bug?

    Quote Originally Posted by Elessar View Post
    I have these. The blockage is before the filters.
    Are they still worth the investment as apposed to the standard filters?

  7. #17
    Join Date
    Apr 2008
    Location
    Isle of Man
    Posts
    2,105

    Default Re: diesel bug?

    Quote Originally Posted by russ View Post
    Are they still worth the investment as apposed to the standard filters?
    Yes....but you don’t need to buy genuine

    https://www.ebay.co.uk/itm/500FG-500....c100005.m1851

    I’ve had Chinese copies on both my boats. No issues at all.....I use genuine racor filters though. They are £12 each

    To avoid contamination...fill up from a decent and high use source, dose with whatever you prefer, check deck filler seals. I had the fuel polished on my current boat. No other reason than it was an unknown. They went through the sender hole...even took pictures of the tank bottom and a report of the fuel before and after. Moisture content etc...

    https://www.tanktechfuel.co.uk/



    Last edited by FARSCO; 28-04-19 at 18:34.

  8. #18
    Join Date
    Jan 2009
    Location
    Stratford on Avon
    Posts
    11,208

    Default Re: diesel bug?

    Quote Originally Posted by Portofino View Post
    The tank full bit is to minimise the exposed surface area of cold metal inside the tank for condensation to form and drip down .
    The water that condensers falls eventually to the bottom near the pick up .If thereís a drain cock it can be poured out or at least regularly inspected by running a pint off now and again .

    The ďbug ď itís self is mixture of anaerobic organisms basically airborne , carried in the air .

    You need water without water it canít proliferated so because Med boats generally stay warm even in winter itís rare in the Med as if anything itís a dryer climate not cold and damp .

    Antimicrobial agents can work , indeed do work but like any microorganisms thereís a risk they develop resistance .Hence the suggestion of rotating products.

    The way I tackle it and have done uneventfully for the past 14 years is come from the water side of the equation.
    No water no bug .
    Iíve been adding Startron additives , the idea is not antimicrobial but water dissolution.This ď snake oil ď reckons to dissolve any water in the fuel tanks into the diesel which is reckons then to burn out harmlessly to the engines in the normal way .
    In other words preventing the water / oil interface the ď bugs ď thrive in .
    There are many different ď bugs ď not one hence my scepticism on the antimicrobial approach as I donít think you can rely on those products to totally eliminate all life .
    Leave 3 % behind , in other words the stuff you choose after 24 hrs kills 97 % , in 7 days that 3 % has proliferated up to occupy the void you kindly made wiping out its competition, back to sq 1 .

    Remember no water nothing lives ,

    Thus far I have no trouble .
    One of my neighbours a CAT Camargue 44 has had to have a fuel barge do a full tank and system decontamination.
    Admittedly itís only used 4 weeks a year so stood idle for 11 months isnít helping. So dispute me mentioning the warm less prone to condensation Med, as said the ď bugs ď are airborne everywhere.

    In cold climates- keep the tanks topped up in the coldest season .
    Regulars start and run up to prevent stagnation , keep the pipes patent .
    Add a prophylactic agent - your call on antimicrobial or anti water layer forming .

    Bear in mind antimicrobial resistance if you opt only for the antimicrobial route .
    Those with CR engines spare a thought for the injector pump and injector tips if you elect to do nothing .
    The Sunsail sailing yachts at Lefkas in Greece suffer from the bug. Winters get down to low single figure temps, and Sunsail are too tight to fill the tanks.

  9. #19
    Join Date
    Jul 2003
    Location
    River Itchen, Southampton
    Posts
    7,218

    Default Re: diesel bug?

    Quote Originally Posted by russ View Post
    Are they still worth the investment as apposed to the standard filters?
    I believe so. If I was speccing a new build I’d have 2 per side with a changeover. So they can be changed with the engine running.

  10. #20
    Join Date
    Jul 2004
    Location
    Rockall
    Posts
    31,252

    Default Re: diesel bug?

    Quote Originally Posted by Elessar View Post
    I had a problem I think with bug last year. It wasn't blocking the filter but actually blocking the pipe prior to the filter.

    I dosed the tank and blew the line through. And I haven't been using the boat much as I had a bad leg but the few little trips I did were all fine.

    Went to cowes yesterday from southampton. It was a bit bumpy ( gusting 45 knots wind - top end of F8) so the tank got a good agitation - and the engine went again.

    Switched to the other tank and all was well thankfully as I didn't fancy berthing on 1 engine in that wind.

    Filter is clear.

    So what does the panel think? Is it bug? Suggested fixes either way please. There is no drain off on the bottom of the tank nor is there an inspection hatch.
    I had exactly the same problem as you have described - engine cutting out in lumpy seas but nothing appearing in the filter(s). Here's what was in the tank:

    Can you sample from the bottom of the tank using a long tube, such as the "wand" of a PELA pump, inserted via the filler pipe?
    A1

Page 2 of 6 FirstFirst 123456 LastLast

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  

Latest YBW News

Find Boats For Sale

to
to