It's a decent motor. I would replace the exhaust housing gaskets on the block and the impeller. Keep it propped to 5800 rpm and go boating. Do a compression test before buying and hopefully a test run on the lake
You can rebuild it but I don't know if I would trust the oil side. Aftermarket are garbage. I would pay up for the OEM one and keep the oiler. If you dont want the oiler Go with the aftermarket double pump. .
Serious reliability issues with those which is why you don't see them used. The OMC CDI ignition is far and away better than atom modules. even the Phasemaker is better than Atom modules.
that motor is a disaster. One piston has had something flying around in it. It probably threw a crank bearing and they rebuilt the crank and never touched the beat to crap piston.