Wont start help

[Virgilbigfish]

I'm New to all this bought me used mt2 g3 and I'm having problems starting it seems like when I'm using my roti starter the motor just free spins then when I put pressure on the output shaft then the piston kicks in and starts going up and down let go of the pressure and free spin

Help please

 

[NightFlier X4.6]

Welcome to the forum and it sounds like a bad one way bearing to me.