N39453 Chapter 4
Page 45
Preventive maintenance periods - 415GM, 422TGM & 422TGM
These preventive maintenance periods apply to average conditions of operation. Check the periods given by
the manufacturer of the boat in which the engine is installed. If necessary, use the shorter periods. When the
operation of the engine must conform to the local regulations these periods and procedures may need to be
adapted to ensure correct operation of the engine.
It is good preventive maintenance to check for leakage and loose fasteners at each service.
These maintenance periods apply only to engines that are operated with fuel and lubricating oil which conform
to the specications given in this handbook.
Preventive maintenance, Models