How to set timing chain
I have only had my valve cover off to set the valves once. I wish I could remember what I saw in there. Could you pull the valve cover off your other 150 and see. Like LT80 said the piston needs to be at TDC and the valves closed. Lobes of the cam facing out. Now that I think about it, there is a mark on the flywheel to tell you the piston is at TDC. If you dont get it by friday I'll take my wifes apart again and look inside if you want.