Kubota WG752 E3 Applications Manual page 79

• Catalyst Identification Marks
The manufacturing number and the catalyst number are marked on surfaces of the catalyst parts.
You must keep record of the catalyst identification information with the engine model and engine serial number
that the catalyst is installed. [Check Item] The catalyst parts are shipped with bar-code identification information.
#1 Part number
#2 Manufacturing number
#3 Catalyst number:
5