Clearing A Jammed Impeller; Mooring Your Boat; Operating In Freezing Temperature - Mercury Jet 20 Manual

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Clearing A Jammed Impeller

It is possible, for a stone or other debris inside the jet housing to lodge between the
impeller and wall, especially after the engine has been stopped. This will lock the
drive shaft and will prevent the engine from being able to crank over for starting. In
this case follow these steps for freeing the jam.
Turn the ignition key or lanyard stop switch to the OFF position and remove all the
spark plug leads to prevent the engine from accidently starting. Remove the flywheel
or rewind cover and rotate the engine flywheel counterclockwise. If this doesn't free
the jammed impeller, it will be necessary to remove the six screws and water intake
housing.
If the flywheel is rotated to free a jammed impeller, there is the possibility that
the engine will crank over and start. To prevent this type of accidental engine
starting and possible serious injury, always turn the ignition key or lanyard
stop switch to the OFF position and remove all spark plug leads from the
spark plugs.
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Mooring Your Boat

When your boat is pulled onto a beach or tied to a dock where the up and down wave
action may cause the water intake housing to dig into sand or other debris, be sure
to tilt the jet drive out of water. Failure to do this may cause the water intake housing
to fill with sand or other debris and could prevent the outboard from cranking over for
starting.
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Operating In Freezing Temperatures
If there is a chance of ice forming on the water, the jet drive should be removed and
drained completely of water. If ice should form at the water level inside the outboard
drive shaft housing, it will block water flow to the engine causing possible damage.
Do not start the engine until the ice is clear.
OPERATION
WARNING
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