My son-in-law has a Husqvarna yth20k46 lawn tractor and failed to refill his oil when he changed it. Needless to say the engine has seized. He is looking to replace the motor and is being asked to fine the SPEC # of the engine. We cannot find it anywhere on the engine or in the manual. Can anyone help me help my son-in-law? The manual says the engine is a kohler model sv600-0212. Is the 0212 the spec #?