Fuel going stale?

[Flip]

Fuel goes stale because the small easy to ignite molecules evaporate and the spark from a std ignition system will not ignite the fuel. Just add a little fresh fuel and everything will be fine, there is no need to dump the whole tank of fuel. I would say 6 weeks in a petrol tank is about the safe limit as all petrol tanks tend to breathe so some degree. In a sealed fuel container 3-9 months. Finally as the fast burning or small molecules leave the fuel the octane rating goes up and octane and igniteability are not the same thing.

[reofix]

stale fuel ....bullshit... its an old excuse for poor maintenance , bad design or shoddy manufacture

[ManDownUnder]

Last time I had problem ascribed to stale fuel was ummm...

... never?... and you?

That answers the concern as far as I'm concerned... the only issue coming close to it is 2 stroke fuel left in the carb of my weedeater which appears to vapourise out leaving a gummy residue (or maybe just the oil coming out of solution) behind making it hard to start.

Yeah - na. I'd happily buy a 44 gallon drum of the stuff on special and use it as needed if possible

[cheese]

Nice to meet you at wood hill today Cheese

Stupid fouled plug ruined my first hour of riding though!
Tried the convict and criminal tracks once SpikedPunch had enough and they were definitely challenging. Took a few detours but my excuse was that I was already pretty stuffed by this stage.

Likewise.

I love that new Criminal track. there is some awesome hill climbs. Unfortunately that track is where I had my spill... Worst thing is that it was not on anything hard. I just fucked up a whoop, went forwards and then back wheel hit a tree root which sent me over the bars and nearly took out my nuts.

[warewolf]

Part of the problem is that gummy residue. It can get bad enough to alter the effective size of jets.

Yes, fuel does deteriorate with time, and yes it is an academic issue. Most of the time we wouldn't notice. If your engine was in not-so-good condition, or extremely highly-strung, you would be more inclined to notice... so reofix is kinda right in that respect.

Worst and only serious case I saw was a kids 2T mxer that had been left for a looong time, several years at least. Float bowl was left full of premix. It had set to the consistency and white colour of soft RTV silicone. We dug that out, and tried to start the bike, eventually by towing it behind the ute, tied with a fairly long rope, fortunately. When it fired up, it passed the ute before the rider could shut the throttle down because that muck had jammed the throttle WFO.

[Hemex]

I just fucked up a whoop, went forwards and then back wheel hit a tree root which sent me over the bars and nearly took out my nuts.

You seemed to be talking in a slight Soprano tone the whole way back mate!

[Rupe]

You seemed to be talking in a slight Soprano tone the whole way back mate!

you two guys get out there today, how'd you find the sand hemi?

It's real good out there at the min, the guys have put heaps of effort into the place.

When you next out for a ride cheese?

[cheese]

Hemi had a spill first lap and broke his unbreakable brake lever!

Won't be riding for a bit, see all excuses under my GNCC thread - Thanks Aaron... LOL

[cheese]

Actually all excuses except about the fluke beating Aaron in the T100, that was skills..... LOL

[Rupe]

Actually all excuses except about the fluke beating Aaron in the T100, that was skills..... LOL

What about the "he will beat rupe" option, I see a challange comming on!!!

[barty5]

What about the "he will beat rupe" option, I see a challange comming on!!!

Well i thoughht the GNCC was going to be the challange might have to be the best of 3-4 laps round thunder when were down there next. (A loop)

[rocketman1]

Couldnt start the KDX the other week it had been sitting all winter with fuel in the tank.
About 30 kicks would not go. You how stuffed you get after that work out
Stuff It drained all the fuel out the tank and the carb, went the shell station bought got can of new gas V-power, sure enough 2 kicks & she lit up like a new one.
Im a believer.

[98tls]

Last time I had problem ascribed to stale fuel was ummm...

... never?... and you?

That answers the concern as far as I'm concerned... the only issue coming close to it is 2 stroke fuel left in the carb of my weedeater which appears to vapourise out leaving a gummy residue (or maybe just the oil coming out of solution) behind making it hard to start.

Yeah - na. I'd happily buy a 44 gallon drum of the stuff on special and use it as needed if possible

for me to,i know as i posted that it lasts at least 2 years with no problems from my own experiance.If you do an interweb search theres guys had no problems with fuel stored way longer than 2 years.

[ManDownUnder]

Couldnt start the KDX the other week it had been sitting all winter with fuel in the tank.
About 30 kicks would not go. You how stuffed you get after that work out
Stuff It drained all the fuel out the tank and the carb, went the shell station bought got can of new gas V-power, sure enough 2 kicks & she lit up like a new one.
Im a believer.

Yup - had the same problems meself with the weedeater at home so I did a little close examination.

Dismembered the carb flushed it out with contact cleaner, reassembled and reprimed it with exactly the same fuel from the weedeaters tank that had not been drained. Started as normal and away she went.

The tiny amount of fuel in the finest ports of the carb seems to evaporate over time leaving the 2 stroke oil to come out of solution. Being a lot less viscous is gums up the ultra fine ports in the carb.

The fuel didn't go off - it went away (leaving it's oily cargo behind).

Diesel does go off - well... it can get a bug. Petrol though? I'm yet to find any real evidence.

[B0000M]

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