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Outboard Care
To keep your outboard in the best operating condition, it is important that
your outboard receive the periodic inspections and maintenance listed in
the Inspection and Maintenance Schedule. We urge you to keep it
maintained properly to ensure the safety of you and your passengers, and
retain its dependability.
!
WARNING
Neglected inspection and maintenance service of your outboard or
attempting to perform maintenance or repair on your outboard if you are
not familiar with the correct service and safety procedures could cause
personal injury, death, or product failure.
Record maintenance performed in Maintenance Log at the back of this
book. Save all maintenance work orders and receipts.
SELECTING REPLACEMENT PARTS FOR YOUR OUTBOARD
We recommend using original Mercury Precision or Quicksilver
replacement parts and Genuine Lubricants.
!
WARNING
Using a replacement part that is inferior to the original part could result
in personal injury, death, or product failure.
EPA Emissions Regulations
All new outboards manufactured by Mercury Marine are certified to the
United States Environmental Protection Agency, as conforming to the
requirements of the regulations for the control of air pollution from new
outboard motors. This certification is contingent on certain adjustments set
to factory standards. For this reason, the factory procedure for servicing
the product must be strictly followed and, wherever practicable, returned
to the original intent of the design. Maintenance, replacement, or repair of
the emission control devices and systems may be performed by any marine
spark ignition (SI) engine repair establishment or individual.
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EMISSION CERTIFICATION LABEL
An emission certification label, showing emission levels and engine
specifications directly related to emissions, is placed on the engine at time
of manufacture.
ob00366
c
h
d
e
b
a
f
i
g
a - Idle speed
b - Engine horsepower
c - Piston displacement
d - Date of manufacture
e - Valve clearance (if
applicable)
f - Family number
g - Maximum emission output for
the engine family
h - Timing specification
i - Recommended spark plug
and gap
OWNER RESPONSIBILITY
The owner/operator is required to have routine engine maintenance
performed to maintain emission levels within prescribed certification
standards.
The owner/operator is not to modify the engine in any manner that would
alter the horsepower or allow emissions levels to exceed their
predetermined factory specifications.
Inspection And Maintenance Schedule
BEFORE EACH USE
• Check engine oil level. See Fuel & Oil ‑ Checking and Adding Engine
Oil.
• Visually inspect the fuel system for deterioration or leaks.
• Check outboard for tightness on transom.
• Check propeller blades for damage.
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AFTER EACH USE
• Flush out the outboard cooling system if operating in salt or polluted
water. See Flushing the Cooling System.
• Wash off all salt deposits and flush out the exhaust outlet of the
propeller and gearcase with fresh water if operating in salt water.
EVERY 100 HOURS OF USE OR ONCE YEARLY,
WHICHEVER OCCURS FIRST
• Lubricate all lubrication points. Lubricate more frequently when used
in salt water. See Lubrication Points.
• Change engine oil. The oil should be changed more often when the
engine is operated under adverse conditions such as extended
trolling. See Changing Engine Oil.
• Replace spark plug at first 100 hours or first year. After that, inspect
spark plug every 100 hours or once yearly. Replace spark plug as
needed. See Spark Plug Inspection and Replacement.
• Drain and replace gearcase lubricant. See Gearcase Lubrication.
• Check fuel line filter for contaminants. See Fuel System.
• Check corrosion control anode. Check more frequently when used in
salt water. See Corrosion Control Anodes.
•
Lubricate splines on the driveshaft.
1.
•
Replace water pump impeller.
1.
• Check tightness of bolts, nuts, and other fasteners.
BEFORE PERIODS OF STORAGE
• Refer to Storage procedure. See Storage section.
Flushing The Cooling System
Flush the internal water passages of the outboard with fresh water after
each use in salt, polluted, or muddy water. This will help prevent a buildup
of deposits from clogging the internal water passages.
Use a Mercury Precision or Quicksilver accessory (or equivalent) flushing
attachment.
NOTE: Do not run the engine while flushing the cooling system.
1. Remove plug and gasket and thread‑in hose coupling.
2. Attach a water hose to the hose coupling. Turn on the water gently
and flush the cooling system for 3 to 5 minutes.
1. These items should be serviced by an authorized dealer.
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3. Remove the thread‑in hose coupling and reinstall plug and gasket.
a
b
ob00484
a - Gasket b - Thread‑in hose coupling
Top Cowl Removal And Installation
REMOVAL
1. Unlock the rear latch by pushing lever down.
ob00485
2. Lift rear of cowl and disengage front hook.
ob00486
INSTALLATION
1. Engage the front hook and push cowl back over the cowl seal.
2. Push cowl down and move the rear latch lever up to lock.
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Corrosion Control Anode
Your outboard has a corrosion control anode installed on the gearcase. An
anode helps protect the outboard against galvanic corrosion by sacrificing
its metal to be slowly corroded instead of the outboard metals.
The anode requires periodic inspection especially in salt water which will
accelerate the erosion. To maintain this corrosion protection, always
replace the anode before it is completely eroded. Never paint or apply a
protective coating on the anode as this will reduce effectiveness of the
anode.
ob00487
Exterior Care
Your outboard is protected with a durable baked enamel finish. Clean and
wax often using marine cleaners and waxes.
Fuel System
!
WARNING
Avoid serious injury or death from gasoline fire or explosion. Carefully
follow all fuel system service instructions. Always stop the engine and do
not smoke or allow open flames or sparks in the area while servicing any
part of the fuel system.
Before servicing any part of the fuel system, stop engine and disconnect
the battery. Drain the fuel system completely. Use an approved container
to collect and store fuel. Wipe up any spillage immediately. Material used
to contain spillage must be disposed of in an approved receptacle. Any fuel
system service must be performed in a well‑ventilated area. Inspect any
completed service work for signs of fuel leakage.
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FUEL LINE FILTER
Inspect the fuel line filter. If the filter appears to be contaminated, remove
and replace.
ob00488
IMPORTANT: Visually inspect for fuel leakage from the filter connections
by squeezing the primer bulb until firm, forcing fuel into the filter.
FUEL LINE INSPECTION
Visually inspect the fuel line and primer bulb for cracks, swelling, leaks,
hardness, or other signs of deterioration or damage. If any of these
conditions are found, the fuel line or primer bulb must be replaced.
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. Remove the spark plug lead to prevent engine from starting.
ob00375
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2. Move gear shift lever into neutral.
R
F
N
ob00461
3. Straighten and remove cotter pin.
4. Place a block of wood between gearcase and propeller to hold
propeller and remove propeller nut.
5. Pull propeller straight off shaft. If propeller is seized to the shaft and
cannot be removed, have the propeller removed by an authorized
dealer.
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.
6. Coat the propeller shaft with Quicksilver or Mercury Precision
Lubricants Anti‑Corrosion Grease or 2‑4‑C.
ob00490
Tube Ref No. Description Where Used Part No.
94
Anti-Corrosion Grease Propeller shaft
92-802867A
1
95
2-4-C Propeller shaft
92-802859A
1
7. Install front thrust washer, propeller, rear thrust hub, and propeller nut
onto the shaft.
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8. Place a block of wood between gearcase and propeller to prevent
rotation and tighten propeller nut. Secure propeller nut to the shaft with
cotter pin.
a
b
c
d
e
ob00489
a - Cotter pin
b - Propeller nut
c - Rear thrust hub
d - Propeller
e - Front thrust washer
Spark Plug Inspection And Replacement
!
WARNING
Avoid serious injury or death from fire or explosion caused by damaged
spark plug boots. Damaged spark plug boots can emit sparks. Sparks
can ignite fuel vapors under the engine cowl. To avoid damaging spark
plug boots, do not use any sharp object or metal tool such as pliers,
screwdriver, etc. to remove spark plug boots.
1. Remove the spark plug boot. Twist the rubber boot slightly and pull off.
ob00375
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2. Remove the spark plug to inspect. Replace spark plug if electrode is
worn or the insulator is rough, cracked, broken, blistered or fouled.
ob00423
3. Set the spark plug gap to specification.
ob00424
Spark Plug
Spark plug gap 0.9 mm (0.035 in.)
4. Before installing spark plug, clean off any dirt on the spark plug seat.
Install plug finger tight, and then tighten 1/4 turn or torque to
specifications.
Description Nm lb. in. lb. ft.
Spark plug 27 20
Lubrication Points
1. Lubricate the following with Quicksilver or Mercury Precision
Lubricants 2‑4‑C or Special Lubricant 101.
Tube Ref No. Description Where Used Part No.
95
2-4-C
Co-pilot, swivel
bracket, transom
clamp screws, tiller
handle bushing, shift
handle detent
92-802859A
1
34
Special Lubricant 101
Co-pilot, swivel
bracket, transom
clamp screws, tiller
handle bushing, shift
handle detent
92-802865A
1
• Co‑Pilot ‑ Lubricate threads.
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• Swivel Bracket ‑ Lubricate through fittings.
a
b
a
ob00491
a - Swivel bracket b - Co‑pilot
• Transom Clamp Screws ‑ Lubricate threads.
ob00492
NOTE: Lubricating the tiller handle bushing and shift handle detent
requires disassembly of the product. These points should be lubricated at
least once a year by an authorized dealer.
• Tiller Handle Rubber Bushing ‑ Lubricate internal diameter.
ob00493
• Shift Handle Detent ‑ Lubricate detent.
ob00494
2. Lubricate the following with Light Weight Oil.
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• Tilt Pivot.
ob00495
3. Lubricate the following with Quicksilver or Mercury Precision
Lubricants Anti‑Corrosion Grease or 2‑4‑C.
Tube Ref No. Description Where Used Part No.
94
Anti-Corrosion Grease Propeller shaft
92-802867A
1
95
2-4-C Propeller shaft
92-802859A
1
• Propeller Shaft ‑ Refer to Propeller Replacement for removal and
installation of the propeller. Coat the entire propeller shaft with
lubricant to prevent the propeller hub from corroding to the shaft.
ob00490
Changing Engine Oil
ENGINE OIL CAPACITY
Engine oil capacaity is approximately 450 ml (15 fl. oz.).
OIL CHANGING PROCEDURE
1. Place outboard in an upright (not tilted) position.
2. Turn the outboard to gain access to the drain plug. Remove drain plug
and drain engine oil into an appropriate container. Lubricate the seal
on the drain plug with oil and reinstall.
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IMPORTANT: Inspect oil for signs of contamination. Oil contaminated with
water will have a milky color to it; oil contaminated with fuel will have a
stong fuel smell. If contaminated oil is noticed, have the engine checked
by your dealer.
a
ob00496
a - Drain plug
OIL FILLING
IMPORTANT: Do not overfill. Be sure that the outboard is upright (not tilted)
when checking oil.
Remove the oil fill cap and refill with 450 ml (15 fl. oz.) of oil. Reinstall the
oil fill cap.
Idle engine for five minutes and check for leaks. Stop engine and check oil
level on dipstick. Add oil if necessary.
Gearcase Lubrication
When adding or changing gearcase lubricant, visually check for the
presence of water in the lubricant. If water is present, it may have settled
to the bottom and will drain out prior to the lubricant, or it may be mixed
with the lubricant, giving it a milky colored appearance. If water is noticed,
have the gearcase checked by your dealer. Water in the lubricant may
result in premature bearing failure or, in freezing temperatures, will turn to
ice and damage the gearcase.
Examine the drained gearcase lubricant for metal particles. A small amount
of metal particles indicates normal gear wear. An excessive amount of
metal filings or larger particles (chips) may indicate abnormal gear wear
and should be checked by an authorized dealer.
DRAINING GEARCASE
1. Tilt outboard so that the oil drain plug is at the lowest point.
2. Place drain pan below outboard.
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3. Remove vent plug and fill/drain plug and drain lubricant.
a
b
ob00497
a - Vent plug b - Fill/drain plug
GEARCASE LUBRICANT CAPACITY
Gearcase lubricant capacity is approximately 195 ml (6.6 fl. oz.).
GEARCASE LUBRICANT RECOMMENDATION
Mercury or Quicksilver Premium or High Performance Gear Lubricant.
CHECKING LUBRICANT LEVEL AND REFILLING GEARCASE
1. Place outboard in a vertical operating position.
2. Remove vent plug from vent hole.
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3. Place lubricant tube into the fill hole and add lubricant until it appears
at the vent hole.
ob00498
a
b
c
a - Vent plug
b - Lubricant at vent hole
c - Fill/drain plug
IMPORTANT: Replace sealing washers if damaged.
4. Stop adding lubricant. Install the vent plug and sealing washer before
removing the lubricant tube.
5. Remove lubricant tube and reinstall cleaned fill/drain plug and sealing
washer.
Submerged Outboard
A submerged outboard will require service within a few hours by an
authorized dealer once the outboard is recovered from the water. This
immediate attention by a servicing dealer is necessary once the engine is
exposed to the atmosphere to minimize internal corrosion damage to the
engine.
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