Fix The Engine Gear On My Dranzer G

Hey Does anyone know how to fix engine gear on my dranzer G? when i wind up the engine gear and rip it it didnt go of so i took the engine gear out the blade base and pressed the white little button underneath the tip it makes a loud CLICK and spins a little. Can anyone help?
Seeing that you already asked your question in the Ask a question, get an answer topic, I will close this.