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fuel tank in a 45' Voyager

DIESEL engine, transmission and generator repair and maintenance discussion forum.
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carver45
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fuel tank in a 45' Voyager

Postby carver45 » June 4th, 2017, 7:07 am

Is there anyone out there who knows how the baffles are constructed in the 227 gal. tank? We are having an issue with the starboard tank, and the fuel polisher (as well as the other 2 a year ago) say they can only reach one area - this side of the baffles. My captain tried to keep things stirred up by using an air compressor, to no avail. We went 4.5 miles and then the starboard engine stopped. Mind you the port tank is fine - and we always add diesel fuel to both tanks when we fuel up. The starboard tank also feeds the generator which of course has from time to time has stopped as well, using the air compressor to unblock the hose works, along with changing filters. So we have something in the tank but we can't figure out how to access it because of the baffles.....

2000 Carver Voyager 450
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Re: fuel tank in a 45' Voyager

Postby Viper » June 4th, 2017, 8:35 am

Welcome aboard. This is a more generic answer than model specific but you'll likely have more than one baffle, the number will depend on the length of the tank. If you look closely at the side wall, you may be able to see the distortion where each baffle is welded. If you can't see anything, call Carver with your hull number, they can put you in touch with the tank manufacturer so you can get some specs, or look for a label on the side of the tank. If you're lucky, they're still around. I know some no longer are.

There should be a gap under the baffle, the height of which really depends on the manufacture's design, and may or may not be large enough to run a hose under to the other side. Multiple baffles do present a challenge even if there is enough room. A more extreme approach would be to cut an access hole on top of the tank between each baffle.

There may be chemical products out there that help break things up but most of their claims are just marketing hype. Try finding something with actual user feedback that has worked for them. Maybe someone here has a suggestion based on their experience.
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John Easley
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Re: fuel tank in a 45' Voyager

Postby John Easley » July 10th, 2017, 9:15 am

Viper wrote:Source of the post Welcome aboard. This is a more generic answer than model specific but you'll likely have more than one baffle, the number will depend on the length of the tank. If you look closely at the side wall, you may be able to see the distortion where each baffle is welded. If you can't see anything, call Carver with your hull number, they can put you in touch with the tank manufacturer so you can get some specs, or look for a label on the side of the tank. If you're lucky, they're still around. I know some no longer are.

There should be a gap under the baffle, the height of which really depends on the manufacture's design, and may or may not be large enough to run a hose under to the other side. Multiple baffles do present a challenge even if there is enough room. A more extreme approach would be to cut an access hole on top of the tank between each baffle.

There may be chemical products out there that help break things up but most of their claims are just marketing hype. Try finding something with actual user feedback that has worked for them. Maybe someone here has a suggestion based on their experience.


We ran into a similar problem, also with our starboard tank. Previous owner hadn't really run the boat in about four years and hadn't kept the fuel tanks topped up. Bought the new-to-us boat and headed off shore to reposition. Got into four foot waves and stirred up algae that we didn't know was in the tank. Limped in and a mechanic blew out the lines and changed the filters. We began using Biobor JF. http://www.biobor.com/products/biobor-jf-fuel-additives/ It's available from a lot of places and much cheaper on Amazon than in most marine supply stores. That killed the algae but it was still in the tank. Took a few trips to drain the tanks and change the filters, topping up the fuel each time, but we now run in rougher water without issues. First dose of Biobor JF was at "shock" levels. After that, we add a "maintenance" amount each time we fuel. Great stuff! Might help you too.
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rcoff512
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Re: fuel tank in a 45' Voyager

Postby rcoff512 » July 10th, 2017, 10:46 am

Carver 45,

Attached are photos of the labels on my 2 tanks. I own 1999 Carver 450 Hull #3.
I looked for baffle indications on my tanks and see none.

Starboard tank is the one with the power cord in the photo as well.
IMG_20170710_102009.jpg


IMG_20170710_101948.jpg


Perhaps if you call Florida Marine Tanks they can advise where the baffles are and how to access the complete interior.
Best of luck. If I can help in any other way let me know.

Rich
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Re: fuel tank in a 45' Voyager

Postby mjk1040 » July 10th, 2017, 2:57 pm

I assume you are running diesel, if so I would suggest a case of fuel filters and some good additive to try and get the algae out of your tanks. Diesel fuel grows bacteria that over time will give you sludge and plug the fuel system. Ideally diesel tanks should be refilled after every use when hot to help minimize bacteria growth and condensation.
Mike :down:
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