Hello Again Dave,

I have just finished installing a new crankshaft, crankshaft bearings and shaft seal in the YS110 I mentioned earlier in this thread. I am currently in the process of trying to install the camshaft.

The instructions state "Turn drive washer so the piston is at top dead center. This can be accomplished by aligning the "I" mark on the drive washer to the top of the mold line on the engine front case. ...cam...should also be mounted with the point mark located towards the top of the engine just below the cam followers." I have a couple of issues/questions regarding these instructions.

I haven't yet mounted the drive washer, it does not have an "I" mark, and doesn't have any kind of key aligning it with the crankshaft anyway. How would I possibly use it to obtain TDC?

I have set the engine at top dead center by aligning the rod pin on the crankshaft with the casting line on the case. I measured the casting line to ensure it represented the center of the case. With the crankshaft aligned with the casting line, I installed the cam. The problem here is that the mark on the cam is not exactly at the top (w/ cam seated in its innermost bearing). In fact, it's almost exactly 1/2 tooth off, so I don't know whether to install it 1/2° retarded or 1/2° advanced?

Thanks in advance for any answers you can give me on these issues.

P.S. I just read through some other 1.10 related threads on the YS Engines Support Forum. Sounds like others are having mid-range problems similar to what I mentioned earlier in this thread. Can you give me some details on what you are finding as the cause for this problem?