Underfloor fuel tank question

[pauleanne]

We have just purchased a Haines Hunter V17C and will probably have heaps of questions as we are new to boating.


Todays question is:


There is an under floor fuel tank that appears to be standard. Does anyone know the size of this tank and do outboards run on a vented fuel system. Appreciate any help.

[Noelm]

How old is the boat? I don't remember any of the older ones having a standard underfloor tank, but of course I could be mistaken! Fuel tank is vented.

[Vitamin Sea]

As Noelm said above, I to do not believe many 17C's came out with standard underfloor tanks, so it could be any size. Drain it out and fill it back up is the way to go.

The vent would more than likely be around the transom area, possibly in the well.

Photos?

[gr hilly]

my old 1980 19 c came out with a 220 litre stainless under floor tank and i got the size from the factory at wacol.cheers,Hilly99.

[Noelm]

yes, but yours is a 19...

[Vitamin Sea]

my old 1980 19 c came out with a 220 litre stainless under floor tank and i got the size from the factory at wacol.cheers,Hilly99.

And my 19c had a 130 litre tank under the floor...

[gr hilly]

Tommy Wild from Sringwood Marine got my Hains built and he would not let me have the motor on it it was covered i know it came off his racing boat,when i bought it he fitted a new 175 merc and i was wrapped.it flew cheers Hilly99.

[pauleanne]

Took a few picks today

[Fed]

Measure the tank & do the sums, use a stick to get the depth.

[Jarrah Jack]

Decent size tank by the looks.

[Noelm]

if the tank is flat on the bottom, the capacity will be a breeze to work out, if it is "V" bottomed, still easy, but just a little more tricky.

[deckie]

Todays question is:

There is an under floor fuel tank that appears to be standard. Does anyone know the size of this tank and do outboards run on a vented fuel system. Appreciate any help.
go here
http://www.calculatoredge.com/enggcalc/volume.html
then scroll down the page and enter your dimensions into "calculate volume of a square or rectangle room" (choose "inches"), click "calculate", then go back up the page and enter that number into "enter value" and click just below that on "cubic inches to litres" to get the tank size in litres.

[pauleanne]

Thank you for all your comments. Finally figured out it holds 150lts! Thanks for your link deckie, worked a treat.

[mowerman]

Hi mate.

You may need to check those measurements.
Mine is 100 liters.
See here. http://www.ausfish.com.au/vforum/showthread.php?165116-This-is-my-story..Continued..Trailer-repair&p=1173833#post1173833

Rod
.

[Argle]

Looks like a fair sized spare tank under the back seat area too by the looks! I would be a bit careful about having both tanks full as it would perhaps sit a bit heavy in the bum?

[WalrusLike]

Don't forget a long tank like that can't fill to the brim and won't suck from the very bottom.

So you lose a fair bit of usable capacity. Don't make a trip based on what it should hold. :)

[pauleanne]

Looks like a fair sized spare tank under the back seat area too by the looks! I would be a bit careful about having both tanks full as it would perhaps sit a bit heavy in the bum?
Spare tank is 50lts so all up will have 200lts when full.


Which fuel tank should you use first??

[WalrusLike]

How do you fill the spare? Is it easy enough to move?

I would probably try and achieve using the lower tank first then refilling it from the spare. If its higher you can maybe have it hooked up to siphon into the lower tank.

That way you avoid having old fuel sitting in either tank. Best to run the main down to one third whenever you can... But not so low you suck the crap from the bottom.

Depends a lot on how many miles you do and how often. If you rarely need the extra capacity maybe just keep the spare empty unless needed. Be careful with vapours though.

You have to use your fuel... it doesn't keep.