Hey alan,
this was the chinese donk i was looking at in oz....
http://cgi.ebay.com.au/ws/eBayISAPI....3559&rd=1&rd=1
I just found the 45cc you were talking about and i reckon that it might just been too much for the 70" fw-190. i was hoping to find a 35-38cc donk. have you heard anything about these SPE engines? i have heard they can be a bit variable in quality, but most replace the carb with a walbro unit which is supposed to set you back about $14 USD and thy run like clocwork and pickup 700-800rpm too.
I know that the CRRPro 26cc he advertises has a thread on here in the gas engines forums and they have been having dramas with the CDI units....
Thanks