PERIODIC MAINTENANCE EPA Requirements Inspection and Maintenance See Inspection and Maintenance of EPA Emission-Related Parts on page 4-8 . Inspection and maintenance procedures not shown in the Inspection and Maintenance of EPA Emission-Related Parts section are covered in Periodic Maintenance Schedule on page 4-5 . This maintenance must be performed to keep the emission values of the engine in the standard values during the warranty period. The warranty period is determined by the age of the engine or the number of hours of operation. 4-4 BY Service Manual © 2009 Yanmar Marine International