mvarzoni

Hello friends!

Has anyone tryed to convert a YS 120 to gas?

Moss

w8ye

My Feedback: (16)

You are going to have trouble because the silcone pump diaphragm in the nose of the engine is not compatible with petroleum based fuels

mvarzoni

Ok, but I live in Brazil and over here, we have Ethanol on every gas station.
Would the Ethanol attack the silicon diaphragam?

How many magnets would I need to install on the prop washer?
Do I need to use same 20% oil mixture or can I reduce that?

Moss...

w8ye

My Feedback: (16)

I don't know about your 80% Ethanol and 20% water mixture with regards to the silicone diaphragm. You are just going to have to try it?

w8ye

My Feedback: (16)

Castor oil doesn't mix as well with ethanol as it does methanol. You still should try the 20% oil

You have to shake it up before you pump into the plane. If left alone it will eventually settle out

The complicated Y-S carb should work with the ethanol

spaceworm

Since in later posts, your suggest your "gas" is 80% Ethanol. Is this like the E85 we use here is the US? Or, what is the 20% rest of the mix? Maybe ask the question again for using the YZ120 with 80% ethanol, or E80 or maybe our E85?????????

As far as the number of magnets, one per cylinder (sparkplug) is required. Guessing that your YZ120 is a single cylinder, only one magnet or one spark per revolutrion is required. Actually only one spark every other revolution is all that is needed, but that complicates the spark timing, and the extra spark does no harm.

av8tor1977

My Feedback: (6)

Some confusion here... Brazil converted to mostly ethanol years ago, as the USA should have done. I don't think they mix their fuels. I believe they have pure ethanol, and limited availablity of regular gasoline. They don't have "E-85" as far as I know.

His reference to 20% was asking if that amount of oil would be needed; mixed with pure ethanol.

Feel free to correct me if I am wrong...

AV8TOR

mvarzoni

OK, here we go,

In Brazil we have
gas with 20% pure ethanol in it.
Ethanol with 15% wather in it

Our car engines runs with both fuel independent or any mix of both.
The ethanol costs like us$0,40 per litre and the gas costs like us$1,00 per litre.

to run our gas DLE engines, we add 10% mineral wather to the gasoline and it causes the ethanol separation from gasoline. so we pump the pure gas from the solution and fuel our engines...

Now, here comes the absourd, each gallon of byron 10% here, costs 50 dollar... the Byron 20/20 costs 80 dollar a gallon... See why I wanna convert my YS?

spaceworm

Do you have Aspen chain saw fuel or Coleman's lantern fuel? Aspen is 95 octane I think, while Colemans is only around 55 octane. But they are both petroleum derived. I use Colemans in My G23. Most everyone says it is too low octane for higher compression engines, but if you can get it, maybe lower the compression ratio of your engines and run it. I think Aspen was developed as a greener fuel for 2 strokes in Scandinavia. I have not found it here where I live, but some say it can be gotten at Stihl dealers.

mvarzoni

NO, any imported fuel is prohibited over here... unless you are an official representant of the brand.

What I know is that ethanol does not harm silicon tube on glow tanks, so, I will keep with Ethanol.
I´m able to buy Methanol in little quantities, like 2 gallons a week, but it is just 96% pure and costs 3 dollars a litre.
Since the YS engine is not good without the nitrometane, I hope I can get a reliable engine using Ethanol or Methanol + 20% oil and a spark plug.

Now, here comes the techinica questions.
Do I need to change something on the YS structure?
Can I stick w/ the original carb or do I need to put a walbro on it?
Do I need to deal with valves and so?

moss

w8ye

My Feedback: (16)

The only thing to worry aboput is that ethanol doesn't support the catalytic a platinum plated glow plug element as well as methanol.

You'll likely resort to spark ignition as you have already mentioned

gkamysz

My Feedback: (19)

YS will run OK without nitromethane. I test ran an FZ-63 not long ago without it and it ran nice. I didn't try to compare to 20% nitro, but there was plenty of power for me.

Glow and ethanol may not work. I could not get my OS FS-52 to run on E85 (85% ethanol and 15% gasoline) and an OS F plug. I normally run this engine with spark ignition, but had a glow plug handy one day. I've heard the Enya #3 might be better.

I think the YS fuel system will be OK. You will have to adjust the regulator though.

av8tor1977

My Feedback: (6)

I too have tried ethanol with a glow plug and the results were definitely unsatifactory. At the very least, you would need to run full time glow power. A recent article in one of the model magazines also verified problems running ethanol with a glow plug, and it looks like OS has dropped their idea of marketing an ethanol burning glow engine. A much better option would be to use ethanol and spark ignition. However, I would still run the recommended amout of oil in the mix.

AV8TOR

mvarzoni

Ok, I thank you all for the tips and recommendations, I will definentelly try Ethanol and spark plug since no majo changes need to be done.

I tryed a home made brew, Methanol and 20% castor oil, the YS simply did not held idle speeds.

As soon I start, I'll come back here and ask for more help and post results as well...

Thanks!
Moss.