One of my Sp 225s sounded "funny" while idling at dock, so I shut them down.Turned out to be a cracked intercooler housing. Ordered another one, took 4 months to get. Re-assembled and tried to start, motor just "clunk", won't turn over. Changed oil & color was slightly off, not bad. Removed injectors & vacuumed out cylinders for water, only got small condensation from 1 or 2 cylinders, but must have sucked a small amount of salt water in, which I didn't know at the time. Have been squirting Marvel Mystery oil into each cylinder for about a month,letting it soak & trying to gently bar it over. No luck so far. Have used about 1/2 quart of Marvel so far. Any ideas would be appreciated. I'm still hoping to free it up if possible. Cylinders are chrome lined, I'm hoping that may improve my chances. Should I add more Marvel to cylinders? Any other ideas I can try?