I don't know if I've got this right but I am looking for a replacement crank shaft for my Honda engine. It is fitted to an Atco Mower approx 5yrs old. Blade bolt is snapped off in end of crank and has resisted all attempts at removal. Serial number stamped in block is GJAAA-3225844 S4LE and beneath is HONDA 186cm3 (cubic centimetres).