I just bought a plane from a swap meet that came with a gas engine. I'm pretty sure it is a conversion engine but I'm not sure what it is. I was told it was a 30cc. I have attached some pictures.

Here are the questions I have aside from the identification:

In the picture of the carb - I assume one needle is low-end and one is high-end. Am I right? Which is which?

There is a fuel nipple next to the needles and another on the opposite side of the carb. Is the nipple next to the needles the fuel inlet? Is the opposite side a pressure tap?

The muffler that came with the engine does not fit. It is a Bennet muffler. Any ideas what it does fit? Where can I get a muffler for this engine?

Aside from those are there any general tips on starting and running this engine? This is my first gasoline engine so I'm really in the dark here.

Thanks for your help!

Keith