New to me. I've completely rebuilt my '89 J60 TLCEA after a sinking in salt water. It runs very strong. This post isn't about that, but I do know my way around older JE 2 strokers. This '84 90 hp sat up for 12 years. Not even in a shed or barn. Just out there beside his barn. I bought it on the assumption that if it made compression, I could get it running. After getting the boat home, I ran a wet compression test on it cold, before any attempt was made to clean up the fuel system. The left two and top right showed about 105 psi. Bottom right showed 80 psi. All right I thought, it could be worse. It's over the 10% difference in cylinders, but it'll run. Two years later, after redoing the foam and deck, I deal with getting it running again. Full carb job, OE carb kits, ultra sonic cleaner, the whole bit. Got the primer loosened up and working again. Did a pre-mix retro fit. VRO is gone. New water pump. Vacuum test lower unit. New fuel lines and filter. Fresh plugs and fired it up. Let it run for a few minutes till the thermostat opened up then shut it off and did another compression test. This one was done engine warm, dry. Compression came up to 120 psi on left two and top right and 95 on bottom right. Pulled bottom right plug, oiled up the cylinder and did a wet compression test on lower right. Engine still warm. It came up to 105-110. All that to pose this possibility. It acts like a stuck ring to me from sitting for over a decade. To my way of thinking, If I had a broken ring it would not have come up that much on the wet test. I could have a scored cylinder wall too. Either way, the stuck ring being the better of the two, I'm betting that after getting it on the water and run it like I stole it, even the lower numbers on the bottom right will come up some. I have sea foam, and will trim up and soak that cyinder before it goes to the lake. One other observation. I have a home made soak solution of acetone and transmission fluid. I trimmed up and brought lower right up to tdc and filled the hole with this concoction. It did slowly leak down and drain away. Out of curiosity, I did the same for top right. No leakdown. So there is something wonky with bottom right. I'm really looking forward to finishing up the boat itself and do a test run. After it warms up, I'm gonna run it as hard as it'll go, for a sustained period then do another compression check. So, for the motor heads, what thinkest thou?
