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Mercury 140 Service Manual

Mercury 140
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MAINTENANCE
47
1. Turn off the engine before servicing the battery.
2. Add water as necessary to keep the battery full.
3. Make sure the battery is secure against movement.
4. Battery cable terminals should be clean, tight, and correctly installed. Positive to positive and negative to
negative.
5. Make sure the battery is equipped with a nonconductive shield to prevent accidental shorting of battery
terminals.
Propeller Replacement
!
WARNING
If the propeller 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 propeller, always shift outboard to neutral position and remove spark plug leads when you are
servicing the propeller.
1. Shift outboard to neutral (N) position.
N
ob00351
IMPORTANT: Refer to Spark Plug Inspection and Replacement for removing spark plug leads.
2. Remove spark plug leads to prevent engine from starting.
ob00375
3. Straighten the bent tabs on the propeller nut retainer.
ob00376
4. Place a block of wood between gearcase and propeller to hold propeller and remove propeller nut.

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Mercury 140 Specifications

General IconGeneral
BrandMercury
Model140
CategoryBoat
LanguageEnglish

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