View Full Version : Recycling mixed ULP
CHAPPY
26-07-2008, 05:58 AM
I am reluctant to launch the tinny with less than 20lt. of fuel in the main tank. I also carry a 4lt. spare tank. The reason being, I have run out once and had bad fuel on another trip. The outboard is only a 15 hp 2 stroke and quite often, I will only use 10lt or less. This fuel could then sit for 4 or 5 weeks before my next trip. So, I usually pour the mixed fuel into the Ford Longreach. My reasoning being, it is easier to walk home than row home.
I just wonder am I doing harm to the Ford? Can any of you learned gentlemen tell me if I am harming my ute or not.
Regards Chappy
dogsbody
26-07-2008, 06:50 AM
Put less fuel in the boat when you go out and buy a larger jerry can and only mix it when you need it on the water. That way you'll have less premix to use. Put it in the mower first, it might be easier to walk home but it may be an expensive one, I don't know. Then again it's only a ford. Sorry Chappy had to get that one in.
I've used fuel a lot older than that with a bit of a top up,,,,so far so good.
Dave.
Innkeepers
26-07-2008, 07:15 AM
Hi Chappy,
I wouldn't be putting pre mix into a vehicle that I relied upon for everyday transport......however........This may help your thinking on the timing of shelf life of your pre mix.
We recently had 6 weeks off and travelled from Armidale out into the deserts West of Cameron Corner and then on up to Innamincka, Birdsville and Mt Isa Camooweal, Lawn Hill, Burketown, Normanton and Karumba.
Along the way we always bush camped in our Bushtracker caravan and had a great fire at night and a few grogs.
We regularly cut firewood with our Stihl Chainsaw which always starts on the third pull of the rope...(takes that to suck the fuel through).
So that was May-June this year and the last time we used that chainsaw was around Feb 2005.
So the fuel in the chain saw and in the 5 litre fuel drum was over 3 years old.
I know that we're told that ULP goes off after 4 weeks and we need to use an additive to prevent that, however, I'm just relating my recent experience.
Hope this helps
Cheers
Rick
BaitThrower
26-07-2008, 07:45 AM
I think the problem with fuel as it ages is more so to do with water and varnish buildup in the fuel, and possibly other contaminants. These might eventually block jets or gum up carbies etc. A little Fuel Doctor added to the tank each time you fill should prevent most of the above occuring.
Kleyny
26-07-2008, 08:35 AM
At a guess the longreach tank is say 70lt. So pooring 10lts of pre mixed fuel into 60lt of normal fuel would realy dilute the oil to a point where in my opinion even if it had 500ml of oil would do little too no damage.
So as long as you poor the boat fuel in when you fill the car up i cant see a drama.
neil
CHAPPY
27-07-2008, 05:58 AM
Thanks gents,
It appears the best solution is to use the boat more. But this fuel doctor may ease my mind.
Thanks for your responses.
Regards Chappy
pubgolf
27-07-2008, 08:26 AM
I had my old Johnson 60 HP play up on me a few years ago. It didnt have a seperator on the fuel line so the first thing i thought of was water in the fuel (which was premixed). A few weeeks later the mobile outboard mechanic came over to service the old girl and i asked him how to get rid of sixty litres of 2 stroke fuel with a splash of water thrown in. He was happy enough to knock a bit off the price of the service and take the fuel which he told me he would use in his old XD falcon ute. When i reminded him that it was premixed 2 stroke and had some water in it he didnt care. 4 weeks later when i was cruising past his place i called in and picked up my jerry cans and his ute ran on it without a problem. That was his daily work car too. Makes you wonder hey?
Cheers
:thumbsup:
Rod
Chimo
27-07-2008, 09:30 AM
I don't know why your worrying about a bit of water going thru the car engine. I fitted water injection to a Ford V8 and 6 cylider years ago and they loved a bit of water. Before the water injection went on we stuck a garden hose above the inlet manifold and turned it on. Had a very solid stream before the thing started to splutter then backed off and then it ran great.
Also used to stick about 1% metho into the petrol tank to sop up any stray water in the fuel and that allowed the water to go thru the sytem and be burnt. Still do that in the boat ie 1% metho which is 1lt metho per 100 lt of ULP.
With water injection the deal is to feed in 1 gal water per 1000 miles or 1.5 to 2 cc water per km preferably so that the volume of water injected increases with the vaccuum so when towing you use more.
Also if the spark is say 6degree advance (old ford V8) change it to 12 degree advance. Still no pinging at that advance with the water injection.
If you get really keen stick a ram tube under the carby ie lift it 50mm and watch the torque band level off at the peak and fuel consumption drop. Went from 18 mpg to 29 and best the Boss got with her soft foot was 31 mpg.
In short I luv water in engines. Also when or if you pull them down the carbon comes off really easy and there is a lot less.
My old Celica seems to love old 50:1 premix; I guess with no lead the oil in the ULP suits it. Have run 25% and up to 50% and it seems fine.
IMHO feed the old stuff thru cars, I sure wouldn't be giving it away or throwing it out unless it really stinks and then its a weed killer.
Cheers
Chimo
garman1
27-07-2008, 10:32 AM
I agree with chimo with the water injection, I had a relative who had water injection setup on a datsun 200b and he was stoked with it..... it actually came as a kit from somewhere. He lived in WA so I guess it was from over there.
It squirted a bit of water in every time you gave the engine a bit of a boot full, it only had a carby on it.
I am not sure I'd do it on fuel injected. vvti. turbo charged blah blah blah though.
cheers garry
Xahn1960
27-07-2008, 09:27 PM
After my last trip I had 150lt of 50:1 premix left in the boat, fed the whole lot thru my wifes little toyota, it ran great on it. We do this after every trip, the car is a fuel injected 4 cyl and never gives a problem with it.
Bill.
Powered by vBulletin® Version 4.2.3 Copyright © 2024 vBulletin Solutions, Inc. All rights reserved.