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Mercury 2.5 Manual

Mercury 2.5
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90-10100R30
9
GB
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19XX
XX
OGXXXXXX
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a
c
b
d
e
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GENERAL INFORMATION
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RECORDING SERIAL NUMBER
It is important to record this number for future reference. The serial number is
located on the outboard as shown.3
a. Serial Number
b. Model Year
c. Model Designation
d. Year Manufactured (Europe Only)
e. Certified Europe Insignia (Europe Only)
obm1
SPECIFICATIONS
Models 2.5 3.3
Horsepower 2.5 3.3
Kilowatts 1.9 2.5
Full Throttle RPM Range 4000-5000 4500-5500
Idle Speed in Forward Gear 900-1000 RPM
Number of Cylinders 1
Piston Displacement 4.6 cu. in. (74.6cc)
Cylinder Bore 1.85 in. (47mm)
Piston Stroke 1.69 in. (43mm)
Recommended Spark Plug NGK BPR6HS-10 or
Champion RL87YC
Spark Plug Gap .040 in. (1.0mm)
Gear Case Lubricant Capacity 4.5 fl. oz. (135ml)
Gear Ratio 2.18:1 2.15:1
Recommended Gasoline Refer to Fuel Section
Recommended Oil Refer to Fuel Section
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1
3
2
1-2in.
(25-50m
m)
a
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INSTALLATION
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INSTALLING OUTBOARD
Boat Transom Height Requirement
1 Measure the transom height of your boat. The boat bottom should be aligned
or be within 1 in. to 2 in. (25-50mm) above the anti-ventilation plate (a) of the
outboard.
Installing Outboard on Transom
2 Place outboard on center line of transom.
3 Tighten transom clamp handles.
goc2
4
occ1
FASTENING SECURITY LINE
4
The primary purpose for installing a security line is to prevent loss of the
outboard if the outboard becomes detached from the boat transom.
An effective security line should be of a working strength of at least five times the
weight of the outboard.
The security line should be attached between the boat and outboard following one
of these steps.
Step 1. The length of the security line should be short enough and affixed in a
manner to prevent the outboard from rising up and disengaging off the boat
transom.
Step 2. The length of the security line should be long enough and affixed in a
manner to permit a detached outboard to submerge completely behind the boat
and stop running but not too short that could allow the outboard to continue running
and propel itself back into the boat.
WARNING
If the length of security line being used is long enough to allow the
outboard to disengage off the boat transom but is too short to not
allow the outboard to submerge behind the boat and stop running, the
outboard could continue running and propel itself back into the boat
with the propeller rotating under power. This exposes the occupants to
serious injury or death.
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2-3
1
4-6
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TRANSPORTING
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CARRYING YOUR OUTBOARD
1
Your outboard has a carrying handle located in front.
TRANSPORTING YOUR OUTBOARD WHEN REMOVED
FROM BOAT
2
With the outboard still in the water, close the fuel shut-off valve and run engine
until it stops, draining carburetor. Remove outboard from the boat and hold
upright until all cooling water is drained out. Lay the outboard down on its back
side so the tiller handle is facing up as shown. Place a protective pad under the
outboard.
3 Close the fuel tank vent.
TRAILERING YOUR BOAT
IMPORTANT: The tilt lock pin is not intended to support the outboard up in
the tilted position when trailering your boat. Use of the tilt pin could allow
the outboard to bounce and drop down causing damage to the outboard.
4 Your boat should be trailered with the outboard tilted down (normal operating
position).
5 If additional ground clearance is required, remove the outboard from the boat
and store securely. Additional clearance may be needed for railroad crossings,
driveways, and trailer bouncing.
6 Side Shift Models Set the gear shift into forward gear. This prevents the
propeller from spinning freely.

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Mercury 2.5 Specifications

General IconGeneral
Fuel Induction SystemCarburetor
IgnitionCDI
StartingManual
SteeringTiller
Cylinders1
Recommended Fuel87 Octane
Shaft Length15 in (381 mm)
Horsepower2.5 HP
Gear ShiftForward, Neutral

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