2003 ST 4 Stroke 9.9/15HP Johnson outboards Service Manual, Page 40Get this manual
PERIODIC MAINTENANCE PROPELLER NUT AND PINPROPELLER
PROPELLER NUT AND PIN PROPELLER
INSPECT INITIALLY AFTER 10 HOURS (1 MONTH) AND EVERY 100 HOURS (6 MONTHS) Make sure that the pin is installed securely If wear, breakage or other damage is found on propeller, propeller bushing or propeller shaft, replace
BOLT AND NUTS
INSPECT INITIALLY AFTER 10 HOURS (1 MONTH) AND EVERY 100 HOURS (6 MONTHS)Check that all bolts and nuts listed below are tightened to their specified torque