Mooring The Boat; Water Intake Blockage; Clearing A Lodged Impeller - Mercury 25 Jet FourStroke Operation, Maintenance And Installation Manual

Mooring the Boat

Be sure to tilt the jet drive out of the water when the boat is pulled onto a beach
or tied to a dock in shallow water. Failure to do this may cause the water intake
housing to fill with sand or debris and could prevent the outboard from cranking
over for starting.

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 jet drive, 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 the lanyard stop switch to the "OFF" position.
2. Remove the spark plug leads to prevent the engine from accidentally
starting.
3. Remove the 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
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WARNING
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