What kind of engine is this?

[ko55]

Hello colleagues, I am writing from Bulgaria and my english is not so good.
Please help, recently i bought a second hand outboard engine. In general, motor works, but i don't
know nothing about it. I attach pictures if anyone can help me i would be very gradeful.

 

[DavidAK]

Re: What kind of engine is this?

Probably a bit late, but that looks like a Mercury Gnat 3.5hp made is Brazil. It's missing the cowling.