Originally Posted by fast fred
VRO = Vary Rarely Oiled. it likes to fail, which cooks the power head. most chuck them and go premix.
Interesting you say that, I know your a knowledgable engine guy from your posts and I think the line on Ribnet follows your thinking. However I read recently an article praising VRO systems as being effective ( being variable which I can see the principal of) and reliable and claiming that any engine developing a fault usually had it diagnosed as a fault with the VRO system, have you personally had VRO faults?
I'll try and find the article again.