Just as a sidenote ... I always scratch my head wondering about "why Honda requies jet changes for optimizing it's performance at high altitudes, while an Onan generator has an ultra-convenient knob you turn for optimizing it's performance at high altitudes?".
I must be missing something here: Does Honda need to do it more right in their portable inverter generators and design in a twist knob for fuel-air mixture adjustments ... or is Onan kidding us in that we're really not doing anything when we turn a knob to change fuel-air mixture in their built-in constant RPM generators? :h