MFL wrote:
dieseltruckdriver wrote:
I only use 91 ethanol free in both of mine, and have never had a problem.
This is the best choice, if available!
Adding ethanol, will cause a more lean condition, and can cause more heat, under load. The OP may have used a higher octane 89 fuel, that contained more ethanol, and caused over heating, of his small gen engine, while under max load?
Jerry
This is what I'm thinking is happening. Too high of an octane (or ethenol) causing it to run way hot and shuts down under load after long periods of running.
I thought it was an altitude issue, but it has done the same at higher altitudes or sea level