The model number is the first line from that sticker on the starter housing. Hence it is normally called a Geo 195 OHV. That is, it is from Tecumseh's last model line, which they called Geo-Tech, it is a 195cc engine, and it has Over-Head Valves. It was made in both vertical and horizontal crankshaft versions. Your particular variant of this model series, the 65 version with horizontal crankshaft, is an E-69012A. I can find almost no information on this engine on the internet - my guess is that Tecumseh's venture into OHV engines happened in the last moments of their engine production and consequently distribution of spare parts may not have been all that extensive.
Tecumseh sold off its engine division and the Peerless transmission division to a private equity firm in 2007. The private equity firm sold Peerless to Husqvarna and closed the engine business in 2008. Engine assets were sold to Certified Parts Corporation, who had a plan to sell the stock of spares to the trade and continue to make some of them, selectively. There was said to be a possibility of making complete engines eventually. Here is a state-of-play report from September 2010:
http://www.manufacturing.net/news/2010/09/certified-parts-corp-determined-to-stay-afloatThis is the Certified Parts website:
http://www.certifiedpartscorp.com/EpiphanyWeb/FlexPage.aspx?ID=189If you go to their FAQ page you will find a dealer locator - perhaps it will be of help. I think it would take considerable luck to find either parts or an engine in Australia, where Tecumseh engines were never popular, and the last-gasp OHV engines do not seem to have been common even in the US.
