Stupid question bought a couple of counterotating 200 johnson from craigslist old looper motors probably 1989 told was running takeoff (upgraded to four strokes) but had set stored upright and covered for two years! I had no option because of circumstance to do compression test, or any real tests (leap of faith kinda deal) motors are locked up both identicaly, crank will rotate about a degree back and forth I scoped out cylinder with boroscope no apparent problem smell like varnish(expected) no water in cyl, I soaked cyl with penetrant and im letting sit just seemed wierd both locked up identically anybody have similar problem when buy outboard that set up. any common problems with these units and how hard to rebuild powerheads. I have no outboard skills but Iam a diesel engine rebuilder so plenty of tools. thanks alot guys been alot of help so far with other parts of project.