Reply With QuoteYears ago, I saw someone on the Tanami Track with a marine/outboard tank mounted underneath a LWB Series III as an extra tank.
If that arrangement survived the Tanami, I would expect it to be safe enough on your pump.
Swaggie
i think this should work........but thought i would ask the question prior to outlaying dollars
to cut a long story short i need to increase the fuel capacity on a small petrol driven water pump
i'm thinkning about buying a marine/boat fuel tank (~20L) and connecting this directly to the carby by-passing the OEM fuel tank.
thoughts?
it case like this where health, safety and environment control are getting over the top
ForumSage
SupporterYears ago, I saw someone on the Tanami Track with a marine/outboard tank mounted underneath a LWB Series III as an extra tank.
If that arrangement survived the Tanami, I would expect it to be safe enough on your pump.
1973 Series III LWB 1983 - 2006
1998 300 Tdi Defender Trayback 2006 - often fitted with a Trayon slide-on camper.
Master
I did exactly that with a transfer pump, using a 40ltr drum.
It works fine. As long as the tank is higher than the carb to avoid air locks you should have no problems.
Pete.
YarnMaster
SubscriberFWIW I'm presuming there's a float valve which regulates the level of fuel in the carby bowl? And a constant fuel level is fairly critical to proper fuel management? If yes to both, then the "head" of fuel (i.e. the weight of the fuel pushing against the float valve) generated by a large container vs the standard tank, might be considerably more thereby putting undue stress on the float valve. Thus you may need to put a tap in the line to regulate the flow so that the float valve isn't overwhelmed. Other than that it should work just fine
MY99 RR P38 HSE 4.6 (Thor) gone (to Tasmania)
2020 Subaru Impreza S ('SWMBO's Express' )
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ForumSage
SupporterWouldn't a tap regulate the flow rather than the pressure?Originally Posted by Hoges
.... .... ....
Thus you may need to put a tap in the line to regulate the flow so that the float valve isn't overwhelmed. Other than that it should work just fine
If what you have described is a problem, then the height of the tank would be the way to control it, wouldn't it?
1973 Series III LWB 1983 - 2006
1998 300 Tdi Defender Trayback 2006 - often fitted with a Trayon slide-on camper.
RoverLord
plug it up and let it go....
to make 1psi of pressure you need to have a height of water of 90cms.
fuel is about 10% lighter than water so lets say you need to make a head of 1m to get 1psi over the normal full fuel height..
lets further say that the OEM tank is sealed (which is reasonable as most fuel tanks now have a one way valve in the cap that lets air in but not fumes out.
Whats the pressure that can be generated by petrol if its sitting on top of an engine thats warmed the environment up by 10 degrees? how about 20? what if its a freezing day and the engine has made a 50 degree temperature differential?
Whats the bet that the engine will be fine with a gravity siphon from a remote tank with a 2m head height and a vented tank (most likely non vented as well, but hey, lets make the siphon easy to start)
Most float controlled needle valves will work happily at between 1+7psi.
Dave
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SubscriberYep, done exactly that when we had to pump water from the Wellington river down to Licola many years ago after some fires - not the last fires, or the fires before that, but the fires before that...
We ran 3.5km of 2 1/2" poly from where the Wellington flows into the Macalister - just up from the windmill for those that know the area, and used a 2" Honda pump to pump he water. It was all down hill but we couldn't quite get a siphon to work, so we stuck the pump on it. Sat a 20 litre container on an upturned milk crate and we would run the pump about 14 hours each day or so - until the 20 litre drum ran out. Did that for a couple of months until the Macalister cleared up, then for a while after that when it rained heavily and the water turned to mud each time.
Eventually the poly pipe got washed away by flooding - it's probably in Lake Glenmaggie by now...
If you need to contact me please email homestarrunnerau@gmail.com - thanks - Gav.
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