engine mounting

The chain is skipping when starting? Even if you put a new one? New rosette and sprocket?

Pick up the back sail and watch the whole motor when starting. It swings backward, the chain is released and jumps. Usually you find out that you have squeezed mounts in the rear engine bracket and the front one is not much better. It is fortune then if you are able to pull off the rear mount pin when dismantling.