I would need the model number of your engine to be able to tell you the shaft length.
If your engine is also a 20" model the gearcase will fit with no problems. They used the same gearcase.
I found something that says Loopeer CD4 and underneath that are the numbers XXX-XXXX. Is that enough to get the shaft length?
No problem. The gearcase you are looking at is a direct fit.
You will need to re-use your old shift rod and possibly the upper driveshaft.
Marine Mechanic
Evinrude Master Technician with 27 years of experience.