That motor has a timing pointer attached to the top cowling support, just to the right of center. You need to make sure it is set correctly.
Another question about the timing mark, is the mark a indentation in the cowling support? Just to the right of center there is an opening where something has been, maybe 2" long, it is gone and the mark we are using we are having a lot of trouble. I printed out the sticky "Timing and Syne of Mere Inlines"
Thank for any help.