My Rotax starter doesn’t seem to want to engage. Last time I started it I spun the axle and then it engaged but it won’t even do that now. Any ideas?
Is the battery fully charged? Maybe the starter is not spinning fast enough.
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I’d second the battery idea. Make sure that sucker is well-charged.
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Yeah sounds like you might be getting voltage drop once the battery is loaded. Once that happens the starter gear will retract. Do you have a multimeter to check the battery voltage while it is running.
Looks like your clutch might be dragging a little possibly. But for sure that starter is not staying engaged.
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Battery is new and fully charged 
Reminds me of my X30 starter. It’s a good idea to have a manual starter handy. I remember hearing Jerry (wrench) mumble about stators and brushes.
I think you hit the nail on the head! Battery showed as being fully charged but wouldn’t turn it over fast enough. I connected up my battery charger to the kart battery with the 50amp start mode on and it turns over perfectly!
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Yep 70% of the time that’s the issue. Battery shows a good voltage with no load on it, but once loaded the voltage sinks.
Glad you got it running.
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