Sept 30 2006 Dear All, This has been a great summer of adventure and learning. I now know more about Yanmar Diesels than I ever thought I would. What ahs happened repeatedly though is thatb as we get rolling a bit and the fuel gets down to about 1/2 we will suck in dirt,air and H2O and then the engine fails. We have been given a few choices as to how to remedy the probs and are trying to get feedback. One has been to suction out the bottom, another has been to steam clean after draining others along the same line include a new 2 piece tank and or a bladder system. We think the tank is 15 US gallons. What are peoples thoughts? Is the fix simple? Should I get a Marine Mechanic to fix it? Also the Pre-filter/seperator has a small diesel leak that a couple of wraps of teflon tape has only slowed the problem (the bottom nut is leaking). Any thoughts as to how to solve that problem? Also while I am at it has any one ever seen or would know where to purchase a drop in filter at the fuel opening to slow/prevent the ineveitable drops of H2O that fall in as well as bits of dirt and dust? Crew Member Kevin (kwcoffin@hotmail.com)
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Clean Tank
Pardon my expression but it sounds like you are cruising on the seat of your pants. If you have dirt and water in your fuel tank the only reasonable solution is to drain it and clean it out. If your fuel fill fitting is leaking water into the tank by all means fix it or replace it, this is a must. The leaking nut....if there is a copper washer replace it, this should stop the leak, if not replace the assembly........you do not want fuel leaking into or on to anything.........BOOM! You have some serious problems that need attention
Pardon my expression but it sounds like you are cruising on the seat of your pants. If you have dirt and water in your fuel tank the only reasonable solution is to drain it and clean it out. If your fuel fill fitting is leaking water into the tank by all means fix it or replace it, this is a must. The leaking nut....if there is a copper washer replace it, this should stop the leak, if not replace the assembly........you do not want fuel leaking into or on to anything.........BOOM! You have some serious problems that need attention
1/2 tank and sucking air
I'd have to agree with Bob. Fuel leaks = BOOM. If you are sucking air at 1/2 tank then something is either seriously amiss or you are motorsailing at an EXTREEM heel angle. The tank needs looking at. A normal marine tech is not going to be able to dispose of the fuel he takes out of your tank and will not get envolved. There are specalist (say $$$$$$$$$$$) who do this. Lots of equipmet that has EPA stamps and such. If you have a transfer pump you could drain the tank almost compleatly through a filter then re-use after cleaning the tank. I'd check the fuel pickup line also as it is probably not configured to take fuel out of the bottom of the tank.
I'd have to agree with Bob. Fuel leaks = BOOM. If you are sucking air at 1/2 tank then something is either seriously amiss or you are motorsailing at an EXTREEM heel angle. The tank needs looking at. A normal marine tech is not going to be able to dispose of the fuel he takes out of your tank and will not get envolved. There are specalist (say $$$$$$$$$$$) who do this. Lots of equipmet that has EPA stamps and such. If you have a transfer pump you could drain the tank almost compleatly through a filter then re-use after cleaning the tank. I'd check the fuel pickup line also as it is probably not configured to take fuel out of the bottom of the tank.
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