Hey guys yall have been alot of help with my past projects. Well yall are in for a treat with this one. I got a 1990 SP not running. I get it open the seat and its the 580 white engine. It doesnt run obviously it has no compression in one cylinder and makes a really really loud clicking noise when it turns over. My question is should I rebuild the engine but if I do rebuild it would it run correctly? How could I check the parts to make sure whoever did the swap did it right. BTW the owner knows nothing of this ski. Thanks in advance!