Troubleshooting - Mercury 135 Optimax Manual

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STORAGE
Fuel system
3. Remove the water separator fuel filter from the engine. Empty the fuel into a
suitable container and discard the filter properly.
4. Premix the following in a container:
.27 oz (8cc) or 2 teaspoons of Mercury Precision Quickleen lubricant.
.27 oz (8cc) or 2 teaspoons of Mercury Precision Fuel Stabilizer
5. Pour this mixture in a new water separator fuel filter. Reinstall the fuel filter.
6. Prime the fuel system as outlined in the "Starting Procedure".
7. Place the outboard in water or use the flushing attachment for circulating
cooling water. Start the engine and run at idle speed for 10 minutes to allow the
treated fuel to fill the fuel system.
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Protecting Internal Engine Components
Note: Make sure the fuel system has been prepared for storage. Refer to Fuel
System on previous page.
IMPORTANT: Refer to Spark Plug Inspection and Replacement Section for
correct procedure for removing spark plug leads.
1. Remove the spark plugs and add approximately one ounce (30ml) of engine
oil into each spark plug hole. Rotate the flywheel manually several times to
distribute the oil in the cylinders. Reinstall spark plugs.
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Protecting External Outboard Components
1. Lubricate all outboard components listed in the Inspection and Maintenance
Schedule.
2. Touch up any paint nicks. See your dealer for touch-up paint.
3. Spray Quicksilver or Mercury Precision Lubricants Corrosion Guard on
external metal surfaces (except corrosion control anodes).
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Gear Case
1. Drain and refill the gear case lubricant (refer to maintenance procedure).
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Positioning Outboard for Storage
Store outboard in an upright (vertical) position to allow water to drain out of
outboard.
CAUTION
If outboard is stored tilted up in freezing temperature, trapped cooling
water or rain water that may have entered the propeller exhaust outlet in
the gear case could freeze and cause damage to the outboard.
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Battery Storage
1. Follow the battery manufacturers instructions for storage and recharging.
2. Remove the battery from the boat and check water level. Recharge if
necessary.
3. Store the battery in a cool, dry place.
4. Periodically check the water level and recharge the battery during storage.
90-10199R30
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TROUBLESHOOTING

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1
STARTER MOTOR WILL NOT CRANK THE ENGINE
Possible Causes
•
Blown 20 Amp fuse. Check starting circuit fuse, refer to Maintenance Section.
•
Outboard is not shifted to neutral position.
•
Weak battery or battery connections are loose or corroded.
•
Ignition key switch failure.
•
Wiring or electrical connection faulty.
•
Starter motor or starter solenoid failure.
2
ENGINE WILL NOT START
Possible Causes
•
Lanyard stop switch not in RUN position.
•
Battery not fully charged.
•
Incorrect starting procedure. Refer to Operating Section.
•
Old or contaminated gasoline.
•
Fuel is not reaching the engine.
a. Fuel tank is empty.
b. Fuel tank vent not open or restricted.
c. Fuel line is disconnected or kinked.
d. Primer bulb not squeezed.
e. Primer bulb check valve is faulty.
f. Fuel filter is obstructed. Refer to Maintenance Section.
g. Fuel pump failure.
h. Fuel tank filter obstructed.
•
Blown 20 Amp fuse. Check fuses, refer to Maintenance Section.
•
Threaded connection of an air hose is loose.
•
Ignition system component failure.
•
Spark plugs fouled or defective. Refer to Maintenance Section.
3
ENGINE RUNS ERRATICALLY
Possible Causes
•
Spark plugs fouled or defective. Refer to Maintenance Section.
•
Incorrect setup and adjustments.
•
Fuel is being restricted to the engine.
a. Engine Fuel filter is obstructed. Refer to Maintenance Section.
b. Fuel tank filter obstructed.
c. Stuck anti-siphon valve located on permanently built in type fuel tanks.
d. Fuel line is kinked or pinched.
e. Injector Plugged.
•
Threaded connection of an air hose is loose.
•
Fuel pump failure.
•
Ignition system component failure.
4
PERFORMANCE LOSS
Possible Causes
•
Throttle not fully open.
•
Damaged or improper size propeller.
•
Boat overloaded or load improperly distributed.
•
Excessive water in bilge.
•
Boat bottom is dirty or damaged.
5
BATTERY WILL NOT HOLD CHARGE
Possible Causes
•
Battery connections are loose or corroded.
•
Low electrolyte level in battery.
•
Worn out or inefficient battery.
•
Excessive use of electrical accessories.
•
Defective rectifier, alternator, or voltage regulator.
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