Onan 5500 Marquis Altitude Adjustment

[tada]

Is there a way to adjust the altitude setting on this generator. Right now, as shown in the picture, it is set for 0 ft. Any help would be appreciated.

Tom

[gatorb8]

possible there was a knob on the bottom broken off, needed to be rotated to the right for higher altitude?

[Redapple]

I have never touched it. Been going to 8k feet every year, it runs fine, maybe rich, but o am ok with that for a week. Longer periods adjustment would need to happen. I think it is a screw on the bottom.

Good luck

[Sunny1]

Tom,
I have the same generator and altitude adjustment knob. The only time I’ve adjusted it has been a few times the generator has been surging and not running smooth and I’ve changed the altitude setting just a bit and it corrected the condition and ran smooth. To adjust all you do is turn the black knob on the bottom. There’s an indicator on the side of the knob. It’s not an exact measurement, but it’ll get you in the ballpark. I’d say don’t touch a thing if your generator runs fine, but if it’s not running quite right adjusting the altitude knob may correct the problem.