Except they are almost all too big (dimensions).
A true start cap would be in the 200 mfd range (177-217 for instance) depending on the HP of the motor.
That's what I figured. But then this 47 uF 200v cap in the chipper motor makes no sense, unless it's a case of serious skimping.
If by ‘almost too big’ it will fit, do it.
I have no idea what a chipper motor looks like, voltage, horsepower or anything else.
My experience is with HVAC, household items, pump motors, etc.
We often used what is called a ‘hard start kit’ on stiff single phase AC compressors. Basically a start cap and electronic relay that is hooked up in parallel with the run cap.
Check Graingers for your capacitor?