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On ethanol and two strokes...

Interesting stuff - as soon as I finish compiling all the information I've received from various places and manufacturers I'll post it.

But the major advice seems to be, if you have a non-injected normally aspirated carb engine, add more oil to the mix - go richer on the oil mix.

Makes sense to me.

 Shortwave
Jun 5
2006
For what it's worth I have heard that excessive oil contributes more to deposits.

Shortwave Sportfishing wrote:

 jamesgangnc
Jun 5
It only makes sense to add more oil, or use the same amount of better oil, for instance a good synthetic like amsoil for 2-strokes (it's designed to provide a higher ratio mix - like 100:1)

While changing the fuel/oil ratio to a less fuel/more oil mix would normally create some problems like plug fouling and "deposits" caused by unburned oil, with a greater percentage of ethanol in the fuel, the fuel mix will burn significantly hotter which should balance out the problem of unburned oil. The extra oil will help slow the burn a little and keep the temp down a little.

It might also help to use a higher octane fuel since it is designed to burn more evenly and a little slower than lower octane fuel, which might help prevent piston holes or cylinder scoring caused by excessive spot heat.

Jeff

Shortwave Sportfishing wrote:

 Chehalis
Jun 5
   
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