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Go Back   SailNet Community > On Board > Gear & Maintenance > Mount above-deck gas tank below-deck?
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Thread: Mount above-deck gas tank below-deck? Reply to Thread
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Topic Review (Newest First)
01-08-2014 05:30 PM
mitiempo
Re: Mount above-deck gas tank below-deck?

Quote:
Originally Posted by azguy View Post
I think if you ran a vent hose you have no problem at all. I'd rather not have that tank mounted on my stern.
The fuel fill cannot be below deck. It is both an ABYC and Coast Guard regulation - eg a law.

If there was a fire I doubt your insurance would pay out either.
01-08-2014 04:54 PM
bajaking
Re: Mount above-deck gas tank below-deck?

Quote:
Originally Posted by mitchbrown View Post
Maybe I missed something here but couldn't you use the existing fuel tank. Just suck out the diesel or whatever is in it and fill it with fresh gas. Run a hose to the outboard and bingo!! all done. It must have a tank if it has an inboard.
I considered that for a minute, but I can't imagine what's inside the tank. Engine seized at least 5 years ago, per p.o., so I suspect there's some 5 year old diesel in there. The tank exterior and its connecting hoses are all sketchy looking. Disposal of the tank is one of my next projects.

I will probably end up just mounting a 3 gallon tank on a small platform atop the transom. Or do nothing and live with it in the cockpit. Oh well. Shame those dinghymates aren't available.
01-08-2014 02:29 PM
svHyLyte
Re: Mount above-deck gas tank below-deck?

Quote:
Originally Posted by bajaking View Post
Mine has the "vomit red" stripe.
Now, if I can only find out where to buy one of these tanks. There's a 6 gallon on ebay for $200. I notice the Moeller site says "approved for use in Australia, New Zealand, Japan". I wonder what that's about.
Humm...

A quick search reveals these units still being offered by Budget Marine in Martinique but no longer offered by either Defender or West Marine or other state-side vendors (of which I was not aware when I offered my suggestion and for which I have no explanation). Other than the used equipment-market, state-side, I don't see many economic solutions to obtaining one. As a practical matter, if you have some building/fabrication skills, you could make up a small platform that your could temporarily hang on your transom to secure a 3-gallon tank to while you were sailing/under-way (but storing them in the ****-pit while you're away from/off the boat). In any case, I would not succumb to the temptation to temporarily mount an outboard tank below deck, elongated vent tube or not.

FWIW...
01-08-2014 01:15 PM
mitchbrown
Re: Mount above-deck gas tank below-deck?

Maybe I missed something here but couldn't you use the existing fuel tank. Just suck out the diesel or whatever is in it and fill it with fresh gas. Run a hose to the outboard and bingo!! all done. It must have a tank if it has an inboard.
01-08-2014 01:05 PM
azguy
Re: Mount above-deck gas tank below-deck?

I think if you ran a vent hose you have no problem at all. I'd rather not have that tank mounted on my stern.
01-08-2014 12:42 PM
bajaking
Re: Mount above-deck gas tank below-deck?

Mine has the "vomit red" stripe.
Now, if I can only find out where to buy one of these tanks. There's a 6 gallon on ebay for $200. I notice the Moeller site says "approved for use in Australia, New Zealand, Japan". I wonder what that's about.
01-08-2014 08:00 AM
svHyLyte
Re: Mount above-deck gas tank below-deck?

You don't need to make a cover. Just paint the tank (leaving the top surfaces red). The portion that crosses the shear strip can be painted "Pepsi Blue" (I assume that's the color of yours as it was the most common on Cal's) and the lower portion white to blend in with the hull. Just use a plastic primer and then a common semi-gloss latex paint. It won't last forever but it will several years at a time and certainly until you get your inboard replaced. And, the tank can later be used for your dinghy, eh?

Good Luck...
01-08-2014 04:39 AM
bajaking
Re: Mount above-deck gas tank below-deck?

The more I think about it, the less I'm inclined to move the tank below deck. The cabin is currently clean and odor free, and bilge is clean and dry as a bone, and I'd like things to stay that way.
HyLyte -- I didn't know such tanks existed. Thanks for pointing that out, and going to the effort of photoshopping one on a Cal! I think I may just go that route. There's little room to work with for setting up a standard boxy tank in the aft cockpit/transom/taffrail area, so that odd tank may be just the ticket. I can make a canvas cover to reduce the ugly factor and provide some sun protection.
01-07-2014 03:17 PM
svHyLyte
Re: Mount above-deck gas tank below-deck?

For the sake of the exercise:
01-07-2014 03:13 PM
miatapaul
Re: Mount above-deck gas tank below-deck?

Quote:
Originally Posted by JoeLena View Post
The hysteria over using gas instead of diesel is just that. Gas has been used a long time, on a lot of vessels without issue.
Well I agree and disagree with this statement. Yes gas can be perfectly safe, if installed in a safe manor, with proper ventilation. But diesel is inherently safer by a large margin than gas. Gas has a very low flashpoint and if not properly vented fumes can pool and explode. diesel on the other hand has a much higher flashpoint and does not create explosive vapors at normal boat temperatures. It basically has to be squirted out of a fine jet to atomize it enough to be flammable. You can drop a lit match into a cup of diesel and the match will go out, not so with gas. So I don't think it is hysteria at all, just that a proper system must be maintained for gas to be safe. Some know that many will not maintain the systems well so recommend diesel instead. Same thing is true of propane, yes it is in fact more dangerous than CNG but as long as you have the proper systems and they are maintained then it is fine.

The bottom line is if you are moving a gas tank below decks you have to make sure the compartment is sealed from the rest of the cabin, and that there is proper ventilation even with a non-vented tank.

Seems to me that a boat like this is likely going to only need a small amount of fuel to have sufficient range, I would get the smallest tank I could find and install it on the stern rail, somehow. If you are going to go cruising for a longer time then you could always put a jerry can on deck. This would get the can out of the cockpit, and the smaller tank would encourage the use of FRESH gas since today's gas is only good for a few weeks at best before you wind up with carburetor issues anyway. The other thing to look into is if it had an A4 (or other gas engine) originally where is the original tank, and if it is sound perhaps you could use that and add a small electric fuel pump inline.
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