Spark Plug Inspection And Replacement; Fuse Replacement; Timing Belt Inspection - Mercury 115 Manuam

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MAINTENANCE
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PROPELLER REPLACEMENT
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Coat the propeller shaft with Quicksilver or Precision Lubricants
Anti-Corrosion Grease or 2-4-C Marine Lubricant with Teflon.
IMPORTANT: To prevent the propeller hub from corroding and seizing to the
propeller shaft, especially in salt water, always apply a coat of the
recommended lubricant to the entire propeller shaft at the recommended
maintenance intervals and also each time the propeller is removed.
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Flo-Torq I Drive Hub Propellers – Install thrust washer (a), propeller (b),
continuity washer (c), thrust hub (d), propeller nut retainer (e), and propeller
nut (f) onto the shaft.
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Flo-Torq II Drive Hub Propellers – Install forward thrust hub (a), replaceable
drive sleeve (b), propeller (c), thrust hub (d), propeller nut retainer (e) and
propeller nut (f) onto the shaft.
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Place a block of wood between gear case and propeller and torque propeller
nut to 55 lb. ft. (75 N·m).
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Secure propeller nut by bending three of the tabs into the thrust hub grooves.
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SPARK PLUG INSPECTION AND REPLACEMENT

WARNING
Avoid serious injury or death from fire or explosion caused by damaged
spark plug boots (a). Damaged spark plug boots can emit sparks. Sparks
can ignite fuel vapors under engine cowl. To avoid damaging spark plug
boots, do not use any sharp object or metal tool such as pliers, screwdriv-
er, etc. to remove spark plug boots.
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Remove the spark plug leads by twisting the rubber boots slightly and pull off.
2
Remove the spark plugs to inspect. Replace spark plug if electrode is worn or
the insulator is rough, cracked, broken, blistered or fouled.
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Set the spark plug gap. See Specification Chart in General Information Section.
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Before installing spark plugs, clean away dirt on the spark plug seats. Install
plugs finger tight, and tighten 1/4 turn or torque to 20 lb. ft. (27 N·m).
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FUSE REPLACEMENT

The electrical wiring circuits on the outboard are protected from overload by fuses.
If a fuse is blown, try to locate and correct the cause of the overload. If the cause
is not found, the fuse may blow again.
Remove the electrical cover and remove the fuse with the fuse puller. Look at the
silver colored band inside the fuse. If band is broken (a), replace the fuse with a
new fuse with the same amperage rating.
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Electric Cover
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Fuse Puller
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Fuse Covers
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Fuse – 30A (2)
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Fuse – 20A (2)
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Spare Fuses
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TIMING BELT INSPECTION

Inspect the timing belt and have it replaced by an authorized dealer if any of the
following conditions are found.
a. Cracks in the back of the belt or in the base of the belt teeth.
b. Excessive wear at the roots of the cogs.
c. Rubber portion swollen by oil.
d. Belt surfaces roughened.
e. Signs of wear on edges or outer surfaces of belt.
f. Loose
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