2003+ Suzuki DF9.9/DF15 four stroke outboard motors service manual, Page 28Get this manual
PERIODIC MAINTENANCE
PERIODIC MAINTENANCE SCHEDULE
The chart below lists the recommended intervals for all the required periodic service work necessary to keep the motor operating at peak performance and economyMaintenance intervals should be judged by number of hours or months, whichever comes firstNOTE: More frequent servicing should be performed on outboard motors that are used under severe conditions
PERIODIC MAINTENANCE CHART