Opinion - what does "rebuilt" mean. I would want to get a look at any paperwork before even entertaining a rebuilt engine of any sort to see who did it and what was done and then research it and the builder to within an inch of their lives so to speak. If it was rebuilt using genuine parts - maybe. Aftermarket parts - not a chance. Then, if it all checks out, a full third party mechanical. Evinrude owners group can be a valuable source of information with technical questions on stuff like this.