Hello Jose……Welcome to the Forum
Can you post a picture of the steam engine, please?
There doesn't seem to be much wrong with it
Is it new?
I would recommend that you oil all moving surfaces and run on the compressor for 15 mins
CAUTION!
You need to be very careful with steam engines and boilers!
The boiler needs to be pressure tested, using a water pump, to a pressure, much higher than the normal running pressure
You need to get a knowledgable competent person to check over the setup and declare it safe, before running again with the boiler, by joining a model boat club and seeking their advice
All the best……….Bob