You have one of Evinrude’s more durable motors. If the block is not cracked , you have a good chance of having it run again. I have 5 — they’re great to listen to — as with all opposed, both cylinders firing at the same time transmit a sharp metallic clack .
There are only a few showstoppers when it comes to getting one running: the aforementioned block, bushings around top/bottom of crankshaft and the lower driveshaft and propshaft bushings. There are lots of parts motors around should you need carb/coil/condensers replaced.