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Question about ethanol gas in two stroke...
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[QUOTE="jaguar, post: 1468298, member: 19340"] Well here in South America my 100cc two stroke had detonation (or was it pre-ignition) problems due to a little higher compression (only 150psi cranking) when I was using gas with 25% ethanol. It was jetted too lean also. Now the cranking psi is down to 135 and it's jetted right on and I use gas that's had the ethanol taken out of it (by me using the water method) and I've had no more detonation problems. Keep in mind it gets as hot as the Arizona desert here. So if the water method lowers octane then it hasn't lowered it too much for my application. I should test for octane level though just to satisfy curiosity. If it's true that the water method doesn't get all the alcohol then it's an extremely small amount it isn't catching because if you do the water method twice on the same gas, the second time doesn't show a measurable amount of alcohol trapped by the water. [/QUOTE]
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Question about ethanol gas in two stroke...
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