Hi, got the RS fired up with a brand new lump…. Runs for 1 or 2 mins with decent oil pressure etc then bang!! And just stops dead. Tried to turn start motor n nothing.

stripped starter and it had seized up and was damaged so guessed hadn’t disengaged n locked engine.

New starter motor fitted and she fires up and makes a god awful like scraping sound.

Take all plugs out and spin on just starter motor and spins over without a noise.

what could of happened?? Don’t want to go down wrong road. But have a awful feel the engine I bought is goosed now.

thanks