Propeller for 20 hp Johnson

[Cobbawaba]

I bought a boat with what I was told had a 1973 20 HP johnson...missing prop and needed a 13 spline non thru hub prop...ordered the prop and it didnt fit, too small...counted the splines and it has 14...I am thinking it may be an 1984 instead of 73. This motor has no numbers anywhere....just need some advise before I order another prop and have to send that one back also...

[Rebel Sympathy]

We can't give you advice without a model and/or serial number.