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Ouch.
At this point we don't know what shaft length motor he has.
I read the Short Shaft and not the length.

Yes,
Short Shaft = 15 inch
Long Shaft = 20 inch

sjp2, let us know the year and model number of the motor so we know exactly what shaft length you have.

If you do have a Long Shaft 20 inch motor, then you are good to go.