Thanks NormK.
I have been looking into ebay but found myself faced with brands I have never heard of such as
Miller Falls (2 year warranty)
RATO (1 year warranty)
Jono & Johno (2 year warranty)

Has anyone had any experience with these virtually no name brands ?

I realize you get what you pay for but for my purposes I dont see putting 1k plus into an engine (eg B&S brand) cost effective.
No rush though so I will keep on looking but if one of these brands as above seen OK I may go this way.