Impeller Removal And Installation - Mercury Jet 20 Manual

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Impeller Removal And Installation

If the drive shaft is rotated while the engine is in gear, there is the possibility
that the engine will crank over and start. To prevent this type of accidental
engine starting and possible serious injury caused from being struck by a
rotating impeller, always shift outboard to neutral position and remove spark
plug leads when you are servicing the propeller.
REMOVAL
1
Shift outboard to neutral (N) position.
2
Remove spark plug leads to prevent engine from starting.
3
Remove the water intake housing that is fastened with six screws.
4
Straighten the bent tabs (a) on the impeller nut retainer and remove the impeller
nut (b).
5
Pull impeller straight off the shaft. If the impeller is tight, use a hammer and block
of wood to rotate the impeller (clockwise) on the shaft until the keyway is directly
above the flat on the shaft. This will free the jammed key and allow removal.
MAINTENANCE
N
WARNING
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b
4-5 a