Oxygenated fuels..ethanol=burn downs??

2strokinit

2strokinit

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If using a oxygenated fuels Yamaha recommends stepping up to the next Main jet size. I run 150's with good results. Perhaps this explains the burn downs???
 
2strokinit said:
If using a oxygenated fuels Yamaha recommends stepping up to the next Main jet size. I run 150's with good results. Perhaps this explains the burn downs???
Click to expand...


Sort of.. But that will pretty much eliminate these issues....If you have already jetted down, you might want to go back to stock. If you have mods, and are jetted higher already, better jump up a size or 2 to be safe....
 
Nos boy where are you?

I would like to hear what Nos Boy has to say about ethanol..... I am staying away from Main, that is for sure. We have always run premium fuel, I guess we better stick with it. Al
 
Mains

To clarify ..I went up, not down. 146.5 are stock Im at 150, they didnt have any 148.5. Is that too much?? Thx...

BTW nice reading link...appreciated!!!!
 
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Have you run your sled? What do the plugs look like? If they are dark cocoa brown then you'll be fine. If you go up in jetting it means that actually your cylinders will mostlikey get a slight bit more fuel than they need, which is not a problem it just means cooler combustion chamber temps and more lubrication.
"IF" you jet too big then your sled will breakup and gurgle (if you will) on top end.
 
Yamaha recomends jetting up with anything more then 5% ethanol,right in the manuals.glad we don't have much of that shit around here..
 
Was wondering about that...(the %-age of that shit in Michigan fuel). I am heading up to go riding next weekend and have to un-summarize my sled and was wondering if I need to drain the reminants of fuel to assure that there is not an issue. Think I might do it just incase as a preventitive measure... T
 
I have not seen any ethanol and any of the sled fuel stops in Michigan or Indiana. I do not think I saw any in Minnesota either. I always use Premium in the sleds. I have seen some at fuel stops along the interstate though, i believe the octane was 89???
 
This is second hand, so take it for whats it's worth. My riding partner calims that he spoke with a gasoline retailer, and was told that there is no legal requirement in Michigan to put the "10% Ethanol" sticker on the pumps. Some stattions do it, some do not.

Anyone know for sure?

here is a excerpt from a Business Week article about ethanol:
Are there any problems with ethanol?
Oh, yes. Ethanol can't travel in pipelines along with gasoline, because it picks up excess water and impurities. As a result, ethanol needs to be transported by trucks, trains, or barges, which is more expensive and complicated than sending it down a pipeline. As refiners switched to ethanol this spring, the change in transport needs has likely contributed to the rise in gas prices. Some experts argue that the U. S. doesn't have adequate infrastructure for wide ethanol use.

Also, ethanol contains less energy than gas. That means drivers have to make more frequent trips to the pump.

Here the website it came from: http://www.businessweek.com/technology/content/may2006/tc20060519_225336.htm
 
Here's another website that discusses how ethanol blend affect small engines:
http://www.ethanolproducer.com/article.jsp?article_id=5273&q=&page=2

Specifically a quote for the article:

Impact on Small Engines
Unlike some on-road vehicles with sophisticated closed-loop operation capability, small engines generally aren’t equipped to adjust fuel/air ratio and apply long-term fuel trim.

Thus, when small engines like those found on chain saws or weed eaters are run on intermediate ethanol blends, they tend to run leaner and therefore hotter. “These open-loop engines are commonly air-cooled, and they customarily operate fuel-rich to achieve cooler combustion temperatures for longevity purposes,” the report states. “With a fixed fueling calibration, as ethanol content in the fuel increases, combustion becomes leaner, leading to higher combustion temperatures and higher component temperatures, as well as changes in emissions and sometimes idle speed.”

Good reading
 
Thats Correct It Is The Law If Its Got It They Have To Tell You And How Much.... I Heard There Is Some Areas Using As Much As 20% That Shit Sucks ... Add Starton To Any Tank Of Fuel Thats Going To Sit For More Than A Day Or Two!!!!!!!
 
Here's a document that clearly states that Michigan gas retailers ARE NOT required to disclose the ethanol content in the gas they sell as long as it is 10% or less. Look at the bottom of page 4.

Read it and weep for us here in Michigan. We may never really know for sure what's in our gas. Jet up and NEVER leave gas in your sled for more that 2-3 weeks !!!

Here's where I found it...

www.marquette.org/documents/LSCP2008GasReport.pdf
 

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It's just a little different, and I can almost guarantee that many of you are using e10 without even knowing it.
 
I agree - We can all adjust to using it, but we need to know what we are putting in the sled so we can adjust our jetting and storage procedures accordingly. ALL stattions should be required to disclose the presence of ethanol in the fuel.

Seeing all the threads this year for engine meltdowns on the 2-stroke forums makes me really seriously wonder if it is related to the ethanol. A buddy who is on a Doo forum says it's discussed a lot there too as many Doo's are melting down too....nor sure if the Poo's and the Cats are suffering too....

I'm just so used to all my Yamaha's being bulletproof.......
 
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