RCU Forums - 91FZ question

Hi,

I just picked up my first YS engine and had a quick question. I read this post from Dave:

Quote:

Not much difference between the two, many parts interchange. We have plenty of parts for both. The AC came two ways, one with a screw in liner which you do not want. It was the first. Only way to tell is to take the cylinder off.

This engine is 'new', never been run and was wondering if I should be concerned about the type of liner in this engine. Don't know how long its been on the shelf so no way to tell if its a early or later model. The only markings besides 'made in Japan' are the 'F-91AC' on the side of the case.

Thanks,

Mike