Suggested Flushing Intervals - Mercury Optimax 250 Service Manual

4. Flush outer surfaces of water outlet nozzle.

Suggested Flushing Intervals

After running jet in salt water environment
Where boat was operated in shallow water or run aground.
Overheat warning horn sounds (May be caused from accumulation of particles/debris
in jet powerhead)
If any of the above conditions are not corrected with normal flushing of engine, it
is recommended that the jet be taken to your authorized dealer for service.
90-888438 JUNE 2002
CAUTION
INSTALLATION
Page 1D-27