Honda Marine BF9.9D Owner's Manual page 104

TAKING CARE OF UNEXPECTED PROBLEMS
If water is flowing from the cooling
system indicator, continue idling for
30 seconds. If the cooling system is
OK, the red indicator light should go
off within 30 seconds (R types), and
the engine will respond normally to
throttle grip or control lever
operation.
If there is no water flowing from
the cooling system indicator, stop
the engine, and tilt the outboard
motor to inspect the water intake
screens. If clogged, clean the water
intake screens, return the outboard
motor to the running position,
restart the engine, and check the
cooling system indicator again.
If there is still no water flowing
from the cooling system indicator,
or if the engine protection system
remains activated after 30 seconds,
return to the nearest boat landing,
and have the outboard motor
inspected by an authorized Honda
marine dealer.
102