3000seb jet change

[Salty]

I live at 4300 ft elev most of the places I use my generator are 4000 ft or above. The spark plug is black, I have cleaned it a couple of times. I think I need to lean it out a little. The manual says the main jet is a #101.3 I have found a #98.8 main jet. Is that 1 step or several steps leaner? Do I need to change or adjust any thing else? Any and all suggestions welcome.

Salty

[CycleRob]

That appears to be one step of change, or at least the amount of change you'll need with your black sparkplug insulator and 4000+ ft elevation. You'll also need to run adjust the pilot screw toward leaner, if there is one (hidden or not).
A too high float level (if adjustable) will also cause a too rich condition. This can also happen with the float needle cone and seat wearing from a zillion hours runtime.

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[Salty]

Thanks for the help Rob. I have recently acquired a service manual, now all I have to do is get the generator, manual, new spark plug, and tiny jet in the same location.

Salty