Lower unit interchange- what years fit?

FinHunt

Recruit
Joined
Jul 4, 2006
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3
First let me start by saying I'm new to iboats.com and really appreciate the site. Excellent source of information. Couldn't ask for much more.
So here's my problem, I need to change out the lower unit on my 1980 Evinrude 70 hp. Model #E70ELCSA. It's a 20" shaft, driveshaft has 4 splines on top, 13 on the prop shaft. What years and hp range will fit this motor?
 
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