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post #1 of 4 Old 05-06-2004 Thread Starter
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Flexible diesel tanks

Does anyone have any experience with the flexible/collapsible plastic diesel tanks? My tankage is only 50 gallons for a 56hp Yanmar and now with a new generator I would like to increase my fuel capacity. Unfortunately my boat seems to have run out of spaces to put a rectangular aluminum or rigid plastic tank.
Appreciate any thoughts you may have...

Marcus
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post #2 of 4 Old 05-06-2004
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Flexible diesel tanks

The basic issue is having two tanks instead of just one.

My boat has two tanks and it is both good and bad. Good is having more fuel if you really need it.

Wheh you have two tanks you need to deaol with both the suplly and return line (with deisel). It;s also hard to take a full tank down to empty without sucking air into the line.

You can''t use all the fuel in any tank without that risk.

I have twin 30 galon tanks with a transfer seicth and an electric fuel pump. I switch tanks from this switch then also must switch the return line. The transfer switch is also wored to the pump so I can also use it to bleed the lines.

That feature is very nice.

It is possible to add a second tank but there is a few down sides.
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post #3 of 4 Old 05-12-2004 Thread Starter
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Flexible diesel tanks

Thanks for the reply. One thought would be to have the second (new and likely smaller than original) set up to simply refill the main tank when nearly empty--either by gravity feed or pump depending on relative positions of the two. Has anyone ever done such a thing and is it reasonable/safe?

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Marcus
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post #4 of 4 Old 05-13-2004
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Flexible diesel tanks

A transfer pump would be the easiest solution. In some ways I think I would prefer that setup were it not already part of my own boat now. I actually would not mind having a transfer pump any way. Adding a set of Racor filters to the transfer line would let you polish the fuel as you transfer it.
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