Well, I pulled open the case and I was disappointed. It has a plastic cam gear. Though, the gears are helical gears which is good.
I think it will probably hold up ok under normal power, but if it were to be spiked under some high power it might eat up the gear a little bit. The governor is in the top left corner there and the low oil sensor is the black bit under the crank.
They also drill out the crank shaft where the rod connects to, to save weight I'm assuming. I'm not sure if this is standard practice in small engines. I don't for see it really being a problem though.
The fly wheel is too parts, the cast iron wheel bit for the weight and then a plastic part that is the fins for the air blower.
I pulled the low oil sensor out, which can be done without removing the cam shaft I think, but I took it out anyways. After I got it all back together and put oil and gas in it, it started right up. At low speed it had a kind of kick to it, which I'm assuming is the power strokes, but if you gave it a little gas it steadied out pretty good. Now I just need something I can bolt it to for like 3 hours to break it in lol.
All of the machined surfaces looked pretty good from what I can remember. The lifter rods seem kind of puny to me as they are only about 1/8" I think.