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post #9 of Old 01-08-2013
Brett01
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Re: Troubles with Bukh

I had the same symptoms with my Bukh DV20 here in Australia. It would slowly starve after maybe 20 minutes. I also had trouble priming it using the manual lever on the vertical lift pump, the lever felt "dead" and it certainly didn't pull any fuel through.

Checked filters etc. etc. all clean.
It ended up being "bug" (microbe growth) in the diesel tank which was a black sludge consistency. It would block the pick up line (thin copper tube) and never even made it into the first fuel/water separator. The motor stopped, suction ceased and bug would drop away allowing another 15 to 20 minutes of running before it stopped again.

It took months to figure this out and was only after we took the top off the tank (built in fibreglass) and simply scooped handfuls of this black sludge out.

Hope this may help.
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