Basic Chemistry
 

The main issue is bio compatibility, so I don't see why someone is suggesting the failures are related to 2-stroke. Notice in the chart linked below where the "no's" appear:

Alternative Fuel Compatibility | Goodyear® Engineered Products

It boils down the basic differences in the rubber chemistry. It's going to need a viton-type rubber compound for bio compatibility:

http://www.biodiesel.org/pdf_files/f...patibility.pdf

Various buna and nitrile compounds make up alot of the rubber in tubing sold as fuel hose.