The comments on loss of generator power at altitude got me thinking: Some (all?) built-in Onan RV generators have a convenient twist knob labeled as "altitude in feet" to adjust their air-fuel mixture if you need to use them at higher altitudes.
Is this type of easy adjustment right on the generator a rocket science feature? Why don't portable generators have a simple twist knob to adjust air-fuel ratios versus altitude?
Messing with jet-changing seems an obsolete solution. I guess fuel injection gets around the need for this ... so how is it done on non-fuel-injection Onans ... and why couldn't what Onan did be included on any portable generator?
