Actually, that is a common inexpensive motor lots of people have.

Mounting it is not that hard. There is usually a plastic "gearbox" like stick-mount that comes with or is available for those motors, and you mount the base of the motor (the flat round part) to the gearbox using 3 screws (or at least 1). Then you can mount the gearbox onto the stick on the firewall if so equpped.

Failing that, I would suggest you take 3 tiny screws w/ nuts preferrably, and mount the base of the motor (the round flat part begind the shaft) to the firewall using the 3 holes it has. That's the way you can mount it directly to the firewall. ...Unless you didn't see those 3 holes already?

I'm hoping someone else will read your question and further elaborate with pictures or something to clarify.

BTW, what kind of plane/brand/model is this motor going to be used on?

[bEdit:][/b] Notice the tiny dark hex-screw on one side of the base of the motor? That holds the rest of the shaft/motor in place. I would tighten that just ot be sure, before doing anything else. Mine came a little loose in flight but thankfully I discovered that and tightened it in time.