good luck theres 2 or 3 different sized sump plugs on the 3s motors. dunno which is wich. ive seen all sorts of different combos
honestly the only thing these will tell you is it's rebuild time. bearings in these are ALU. non magnetic. pistons and rods are ALU. non magnetic. if there is a signifigant amount of metal on the magnetic plug, your motor is in dire need.
