Do you have a copy of the Ryobi RY48111 Riding Mower repair manual? We have not been able to identify the issue as the blades are not turning. Replaced the battery (installed a lithium 48V for easier use). The mower does move. Using a multi-meter to measure the leads from both of the blade motor controllers, they were all measuring 18 ohms. Replaced one of the mower motors and it is still not working though.