You're welcome Marvic, I'm sorry I don't recognise the engine type. I've never actually encountered one of those very small (5 cubic inch, the smallest B&S engine size made in a very long time I think) gravity-fuel-feed engines. As I said, it seems to be a relatively recent successor to the 1950s small engines.
If you find the model number, please post it here - I'll leave this thread open.
