How long for oil to separate

[Mr Bogus]

On the smaller scale of things...I have a 2nd season old chain saw that would not run after sitting for 2 months during the Summer.

They rebuilt the carb under warranty and blamed the ethanol for the issue, they said the gas evaporated out leaving the white residue on the diaphram from the ethanol which caused the issue.

They suggested to always run higher octane fuel, advising this will not solve future issues but it will not be as bad of an issue.

the white residue is the oxidized aluminum from the alcohol (same as rust).. nasty nasty stuff...

I learned this lesson the hard way... Hiborn injector on the drag boat and I had to "make" some 'AN' fittings.. 'AN' fittings are "anodized" lots of pretty colors...

well let me warn you, it is not just for looks...(I never knew any better)

where I had drilled and ramped the internal passages, the fuel (pure methanol) had oxidized the now "raw" aluminum.. that stuff made it clear back to the fuel tank and plugged the filters, and polluted the entire system.. Motor leaned out at about 8500 rpm in the lights and vaporized a set of pistons.. was not pretty... could not return for next round either so throw away a race too....

that one or two inches of "un anodized" fuel system probably created 3 or 4 ounces (by volume) of that white powder.... every thing went in for "hard anodize" after that little screwup...

 

[outlawbusa]

WoW~!~

That really had to have made your day~!~

 

[Mr Bogus]

WoW~!~

That really had to have made your day~!~

understatement... 1000 mile one way trip to RedBluff CA from Phx... win first round and go home...

the stuff apparently formed overnight.. Loaded the boat full of fuel 4 times for qualifying and then drained it for the overnight sit (we actually put gasoline in the system and run the boat to flush the methanol out at end of day, but obviously was not sufficient)..

Loaded full of fuel Sunday AM, warmed it up, changed the oil and put it on the water... and put on a light show...

 

[StromBusa]

Any companies still selling gasoline without 10% ethanol? Effin ethanol

 

[outlawbusa]

I hear it's out there, but hard to find.

I called down through 3 states trying to locate MR9 this past fall (went dry here due to pricing issues) and did find one fella that runs a fuel business in NC that seems to have just about anything that you could possibly want. He gets shipments in 55 gallon drums.

I mapped him out, but did not end up using him because of a very nice member of this board picking some up for us from up North.

It'd take a little digging, but I'm sure I still have his info somewhere...