GDPR150987
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Sorry for a duplicate thread - I posted this in the practical section but thought I may get a better chance of an answer on here. Do you think the fuel sample has bug contamination?
Thanks
Fuel Bug?
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Sorry for a duplicate thread - I posted this in the practical section but thought I may get a better chance of an answer on here. Do you think the fuel sample has bug contamination?
Thanks
BruceK
Well-Known Member
Almost certainly yes.
However if you want to be sure: http://www.marine16.co.uk/acatalog/Diesel-Bug-Test-Kit-3.html
However if you want to be sure: http://www.marine16.co.uk/acatalog/Diesel-Bug-Test-Kit-3.html
kashurst
Well-Known Member
definitely, I like Grotomar 82, some like Marine 16 as they both kill the bug dead, but there are others so take your pick. Get half a dozen filters too.
GDPR150987
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Thanks guys
Bandit
Well-Known Member
Yes Fuel Bug.
Treat with a good Biocide such as Grotamar 82 at shock dose, mix in a cn with a bit of diesel and pour into the tank, it mixes better.
If you have not already done so drain the bowls of the prefilters and pull the filters and inspect. Keep at least 4 spare sets of prefilters in case you get a blockage at sea.
To get fuel bug you will probably have water in your tank and the bug grows on the interface between water and the fuel above or you have drawn it from a contaminated source which is highly unlikely.
Strip the bottom of your tanks to clear the water, the water will be corrosive due to fuel bug and may damage your tanks.
If you have a big problem dose with a shock dose of Grotamar and get the tanks cleaned and the fuel polished.
Treat with a good Biocide such as Grotamar 82 at shock dose, mix in a cn with a bit of diesel and pour into the tank, it mixes better.
If you have not already done so drain the bowls of the prefilters and pull the filters and inspect. Keep at least 4 spare sets of prefilters in case you get a blockage at sea.
To get fuel bug you will probably have water in your tank and the bug grows on the interface between water and the fuel above or you have drawn it from a contaminated source which is highly unlikely.
Strip the bottom of your tanks to clear the water, the water will be corrosive due to fuel bug and may damage your tanks.
If you have a big problem dose with a shock dose of Grotamar and get the tanks cleaned and the fuel polished.
QBhoy
Well-Known Member
Hi
Bandit is totally correct in all he/she has mentioned. But, please be aware that it's often the case that after such a problem and when bioside or fuel treatment is added, it can often cause a fuel blockage problems for a period afterwards.
Best to have many filters spare and be prepared to change them frequently. It's ultimately doing good in the long run, but can (by its very nature) break up the sludge in your tank (that perhaps wasn't bothering too much before) and send it through the system.
Best of luck...
Bandit is totally correct in all he/she has mentioned. But, please be aware that it's often the case that after such a problem and when bioside or fuel treatment is added, it can often cause a fuel blockage problems for a period afterwards.
Best to have many filters spare and be prepared to change them frequently. It's ultimately doing good in the long run, but can (by its very nature) break up the sludge in your tank (that perhaps wasn't bothering too much before) and send it through the system.
Best of luck...
Bandit
Well-Known Member
Its a judgement thing as to how bad the contamination is From:
1/ shock dose with Grotamar 82 and clean it out over time with the pre filters
to
2/shock dose with Grotamar 82 and get the tanks cleaned and the fuel polished.
Without seeing it first hand its hard to judge, but my feeling is start with 1/ wait a day or two for it to work and take it for a sea trial and then inspect the prefilters.
If you start to get "Hunting" on an engine revs where they drop and struggle to come back to throttle setting and drop again etc. That is probably due to diesel bug and general debris it mats up with from the fuel tank blocking a fuel pick up or line, as a temporary measure you can blow back down the line with compressed air or a dinghy pump to blow the obstruction back in to the tank.
The other thing is personally if i bought a new diesel powered boat tomorrow i would treat with a good Biocide such as Grotamar 82 from day 1 at normal preventative doses of 1 litre Grotamar to 4,000 of diesel, engines and repairs are expensive its worth protecting them.
You will still need to strip the water out of the tank. A new Pella type oil removal vacuum pump https://www.amazon.co.uk/Extraction-Transfer-Syphon-Diesel-Chemical/dp/B004CWG1Q4/ref=sr_1_10?ie=UTF8&qid=1469249869&sr=8-10&keywords=oil+extractor+pump. They get stained and contaminated with lube oil so I keep one only for diesel extraction, luckily on my boat each tank has a sump and a stripping line I check it annually, pour contents out in a clean white plastic pot to see debris and estimate water quantity.
1/ shock dose with Grotamar 82 and clean it out over time with the pre filters
to
2/shock dose with Grotamar 82 and get the tanks cleaned and the fuel polished.
Without seeing it first hand its hard to judge, but my feeling is start with 1/ wait a day or two for it to work and take it for a sea trial and then inspect the prefilters.
If you start to get "Hunting" on an engine revs where they drop and struggle to come back to throttle setting and drop again etc. That is probably due to diesel bug and general debris it mats up with from the fuel tank blocking a fuel pick up or line, as a temporary measure you can blow back down the line with compressed air or a dinghy pump to blow the obstruction back in to the tank.
The other thing is personally if i bought a new diesel powered boat tomorrow i would treat with a good Biocide such as Grotamar 82 from day 1 at normal preventative doses of 1 litre Grotamar to 4,000 of diesel, engines and repairs are expensive its worth protecting them.
You will still need to strip the water out of the tank. A new Pella type oil removal vacuum pump https://www.amazon.co.uk/Extraction-Transfer-Syphon-Diesel-Chemical/dp/B004CWG1Q4/ref=sr_1_10?ie=UTF8&qid=1469249869&sr=8-10&keywords=oil+extractor+pump. They get stained and contaminated with lube oil so I keep one only for diesel extraction, luckily on my boat each tank has a sump and a stripping line I check it annually, pour contents out in a clean white plastic pot to see debris and estimate water quantity.
GDPR150987
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Thanks for your help guys. Looks like there is some hard work infront of us. Thanks again.
