Water Intake Blockage; Clearing A Lodged Impeller - Mercury Jet 25 Manual

Water Intake Blockage

A rotating impeller could cause injury if contact is made with
hands, clothing, or tools. To avoid injury, keep hands and clothing
away from the inlet or outlet of the jetdrive, regardless of whether
the boat is in the water. Secure tools and loose items to avoid
being struck by projectiles as a result of contact with the rotating
impeller, and to prevent damage to the impeller.
A large amount of debris being drawn into the water intake may
result in a loss of power. Intake suction holding debris against the
grate will result in restricted water flow. Shutting the engine off may
allow the debris to fall off the intake grate allowing full power to be
restored. If debris does not fall off the intake grate, the engine must
be shut off and debris physically removed from the grate.

Clearing A Lodged Impeller

Rotating the flywheel to free a lodged impeller can accidentally
start the engine, resulting in serious injury or death. Always turn
the ignition key or lanyard stop switch to the "OFF" position and
remove all spark plug leads from the spark plugs.
It is possible for debris to lodge between the impeller and jet
housing wall, especially after the engine has been stopped. This
will lock the driveshaft and will prevent the engine from being able
to crank over for starting. Following are steps for dislodging the
impeller.
1. Position lanyard stop switch to the "OFF" position.
2. Remove spark plug leads to prevent the engine from
accidentally starting.
3. Remove flywheel or rewind cover and rotate the engine
flywheel counterclockwise.
If this does not dislodge the impeller, it will be necessary to remove
the six screws and water intake housing.
OPERATION
WARNING
!
WARNING
!
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