SELVA MARINE SEA HORSE2 User manual

OWNER'S MANUAL
Sea Horse 2,5
(Vers. 01-2008)
(Inglese)

1
This manual must be considered as an integral part of your outboard motor and has to be kept with it, also if the motor is resold.
Selva joint-stock CO. reserve the right to change its product at any moment, except for the essential specifications, which will be
kept as they are.
Any reference to products or details of a third party has only an informative purpose and it doesn't represent an obligation.
Selva joint-stock CO. doesn't take on any responsibility concerning the performance or the employment of these products.
We are glad that you have chosen a SELVA MARINE product, which means quality, technology and careful research. Your choice
will give you many advantages, which you will soon learn to appreciate. Our dealers, our after-sales service and the guarantee,
which you have signed, together with the observance of the information contained in this owner's manual are the essential
conditions to give your recent purchase a long life.
Your holiday, your favorite sport, your job, which has from today the name SELVA MARINE, will be a further moment of satisfaction.
This manual belongs to Selva joint-stock CO. All rights reserved. Any partial or total reprinting without the permission is
prohibited.

2
INTRODUCTION
Before operating this outboard motor, read this Owner's Manual carefully
and completely, pay attention especially to the safety measures and
rules.
Your safety and other people's safety do not depend only on your ability
at using the motor, but they depend also on your knowledge and on the
efficiency of the motor as well as on the respect of the laws and
regulations relating to the use of outboard motors.
We suggest you improve your knowledge of the motor so that you can
sail with mastery and confidence.
If any kind of repair on the motor should not have been clearly described
in this manual or if you want to order spare parts or accessories, or if you
have any question about the operation or maintenance of your outboard
motor, please consult an authorized SELVA MARINE service station or
SELVA MARINE dealer
ATTENTION
Pay attention to all the particularly important information that in this
manual are distinguished in the following ways:
Safety measures and rules, which protect the machine
operator and other people from serious accidents or
risks.
Directions or special precautions that must be taken
to avoid damage to the outboard motor or personal
accidents.
Directions that make procedures easier or clearer.
Technical information.

3
OUTBOARD MOTOR IDENTIFICATION DATA
This data is stamped on the label attached on the clamp bracket, as
shown on the picture 1.
When you receive your new SELVA outboard motor write down the serial
number, it will be useful to you in case you will have to order spare parts
or for reference if your outboard motor would be stolen.
Make sure that the data on the label is the same as the
data written in your registration book.
Picture No.1
Do not install an outboard motor with higher horsepower
than shown in the certification of your boat.
SERIAL NUMBER RECORD
Write down the identification number and the model of your outboard
motor in the spaces below.
MOTOR MODEL
SERIAL NUMBER

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CONTENTS
GENERAL INFORMATION.............................................................1
Introduction....................................................................................2
Outboard motor identification data.................................................3
Serial number record.....................................................................3
Directions for use. Basic safety measures.....................................5
Specifications.................................................................................8
Location of main components........................................................9
Control functions...........................................................................10
Wiring diagram..............................................................................11
Symbols........................................................................................11
THE USE OF OUTBOARD MOTOR..............................................12
Preliminary controls chart ............................................................12
Check of the supply......................................................................13
Outboard motor mounting.............................................................13
Trim angle adjusting .....................................................................14
Refuelling ....................................................................................15
Fuel...............................................................................................15
Mixing oil.......................................................................................15
Starting ........................................................................................16
Verifications before starting the motor..........................................16
Starting procedures ......................................................................16
Verifications when the motor is on................................................16
Use of the motor...........................................................................16
Running-in procedure.................................................................17
Stopping procedure....................................................................17
Emergency stopping procedures ..................................................17
Stopping in normal conditions.......................................................17
Operating in reverse gear...........................................................17
Removal of the motor from the boat..............................................17
Cleaning.......................................................................................18
Cleaning outside ...........................................................................18
Cleaning cooling-water passages.................................................18
MAINTENANCE..............................................................................18
Introduction ...................................................................................18
Periodic inspections and adjustments chart..................................19
Greasing chart ..............................................................................19
Greasing and additions.................................................................20
Gearbox-oil change.......................................................................20
Adjustment of idle..........................................................................20
Sacrificial anode............................................................................20
Spark-plug.....................................................................................21
Replacement of the propeller........................................................21
Storage..........................................................................................21
TROUBLESHOOTING....................................................................22
Troubleshooting chart ...................................................................22
EXPLANATORY PICTURES..........................................................25

5
DIRECTIONS FOR USE
BASIC SAFETY MEASURES
To use the outboard motor you must have all requisites provided by law
(physical suitability, insurance, government duties, registration, and so on).
We suggest you become familiar with your boat equipped with SELVA
motor in places, which are not too crowded.
Taking some medicines, alcoholic drinks or drugs increase considerably
the risk of accidents.
Make sure that you are in a physical condition suitable for driving. Pay
attention to tiredness and sleepiness.
The engine operator should not let his mind wander, or be distracted or
influenced by other people, things or actions,(do not smoke, eat, read, and
so on.) while steering the boat.
Use fuels and oils suitable for the engine, which are listed in the "greasing
chart ".
Check every so often the oil level and the fuel level.
Stop the motor before every kind of maintenance or cleaning procedures,
and in case of complicated maintenance take the spark-plug cap out.
Picture No. 2.
When the motor is running it may reach high temperatures.
Before opening the top cowling, wait till the engine has cooled down.
Do not open the top cowling, when the engine is running. Picture No. 3.

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PAY ATTENTION TO THE PROPELLER
The propeller is certainly the less protected part of your motor. It is
therefore forbidden to get near the propeller when this is in rotating. You
must leave bathers, skiers and other boat users enough space to move, in
order to avoid any contact with the propeller. Picture No. 4.
The engine operator must attach the engine stop switch lanyard to his
wrist when the motor is on. Picture No. 5.
Never sit on the motor. Picture No. 6.
Never change the trim/tilt angle of your motor pushing on the steering
handle. Picture No. 7.
The motor must always have its top cowling on, when it is operating
Picture-No. 8.
When starting there must be nobody within the engine operator's action
radius.
Picture No. 9.
There must be nobody within the motor steering radius.
Never tilt-up the motor out of the water, while it is in motion.
Picture No. 10.
Never pull the recoil starter handle, while the motor is running.
To transport the motor use only the proper handle.
Before transporting the motor you have to tilt-up the steering rod properly
and the event valve on the fuel tank must be closed.
When starting or operating the engine, do not touch electrical parts and
particularly the ignition-coil, the high voltage wire, the spark-plug cap and
the spark-plug itself.

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If the motor has had an accident, you should have it fully checked, before
you use it again. If necessary let the SELVA MARINE authorized skilled
staff have a look at it.
Do not use the motor, if the damage could have compromised the sailing
safety.
Any alteration attempted on your motor or the removal of any of its basic
elements, can compromise its safety and it is besides against the law, and
anyway it means the immediate loss of your guarantee.
Observe the laws in force.
Pay great attention to the weather conditions. Listen to the weather
forecast and take the warnings to the sailors into consideration.
Keep your boat and equipment on board in a perfect state of efficiency.
Keep enough spare parts on board.
Inform somebody of your route, before sailing.
Prevent fires and explosions.
Before operating an outboard motor, you must know the laws and
regulations relating to navigation.
Avoid sudden and dangerous manoeuvres
SELVA motors are only meant as propulsion for pleasure crafts.
SELVA joint-stock CO. declines all responsibility for any damage to items
or harm done to any person, which is due to an improper use of the motor.

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TECHNICAL DATA
MODEL SEA HORSE
POWER 2,5 HP 1,8 Kw
FULL THROTTLE OPERATING
RANGE 6000
PISTON DISPLACEMENT 55
BORE X STROKE 47 x 32
NUMBER OF CYLINDER 1
ENGINE TYPE Cycle eight – four stroke
AVERAGE CONSUMPTION 0,7 liters/hour
FUEL Unleaded gazoline
FUEL TANK Incorporated lt 1,4
OIL TANK Incorporated cc.700
RECOMMENDED OIL NMMA TC-W3 – SAE J 1536 GRADE 3
(OIL FOR MIXTURE 2 STROKES SYNTHETIC)
IGNITION electronic
SPARK LEAD fix
STARTING Manual with easy start system
SPARK PLUGS Champion: RZ7C – NGK: CMR 7H
EXHAUST submarine
COOLING Motor Block : Air
Exhaust and transmission : water cooling with forced circulation caused by a pump
PROPELLER REDUCTION RATIO 13/30
GEAR SHIFT LEVER 360° rotation
RECOMMENDED GEARBOX-OIL "SELVA OUTBOARD MOTOR GEARBOX OIL" (API GL-5 SAE 80W/90)
GEARBOX-OIL QUANTITY 95 cc. / 90 gr.
PROPELLER TYPE anti-weed with two blades
TRIM ANGLE ADJUSTING 4 positions, which you can select through pin
SUSPENSIONS anti vibrations annular shock-absorbers
RECOMMENDED HEIGHT OF
THE TRANSOMS(mm.) normal shaft 380 - long shaft 510
WEIGHT (Kg.) normal shaft 17 - long shaft 17.5
Selva joint-stock CO reserve the right to change weight, construction, materials and characteristics without warning and without therefore having to change
the motors, which were built previously. See Picture No. 11 for the dimensions of your motor.

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LOCATION OF MAIN COMPONENTS See picture No. 12
N° DESCRIPTION
1 Tilt-up handle and air intake
2 Grill for air motor cooling expulsion
3 Transport handle
4 Cooling system warning lamp (only when propeller is engaged)
5 Steering adjustment
6 Trim angle adjusting-rod
7 Anti-cavitation plate
8 Propeller nut
9 Propeller
10 Oil drain plug hole
11 Cooling water inlet
12 Oil level plug hole
13 Anode
14 Swivel bracket
15 Clamp-screws
16 Security stop rope
17 Security stop / stop switch
18 Starting handle
19 Accelerator grip
20 Throttle control adjustment
21 Choke knob
22 Front cowling lock lever
23 Fuel tank cap
24 Oil tank cap
25 Motor lift cam

10
CONTROL FUNCTIONS
Security switch / Push-button to stop the motor.
Pressing the stop button (red) the ignition circuit is interrupted and the
engine stops immediately. Picture No. 13.
Choke knob.
Pulling this knob supplies a rich mixture required to start a cold engine.
Picture No. 14.
Recoil starter handle.
Pulling this handle starts the engine.
Picture No. 15.
Throttle-control adjustment.
Device which permit to have a constant speed.
Picture No. 16.
Accelerator-grip/steering-handle.
Turn the grip to operate the accelerator, and move it sideways to adjust
the steering angle. Picture No. 17.
Cowling lock lever.
Moving this two levers upwards locks the top cowling. To remove the top
cowling push the cowling lock levers downwards
Picture No. 18.
Motor tilt cam
You use this to bloc and unblock the engine in the tilt position
Picture No. 19.
Clamp-screws.
Use them to clamp the outboard motor on the transom
Picture No. 20.
Steering adjustment grip.
With it you can adjust the resistance to steering movement. Screw it to
increase resistance. Picture No. 21.
Trim angle adjusting-rod.
It can be positioned in different holes in order to obtain the appropriate trim
angle. Picture No. 22.

11
Wiring diagram.
Legend
1. Flywheel
2. Ignition-coil
3. Sparking plug.
4. Security stop. Button to stop the motor
Picture No. 23.
SYMBOLS see picture No. 24.
1. A serious risk is present. The machine operator must read and follow
the instructions in the manual.
2. Pull the choke knob.
3. Position of the gear-shift lever.
4. Warning against fire hazard.
5. Button to stop the motor

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THE USE OF OUTBOARD MOTOR
PRELIMINARY CONTROLS CHART
DETAIL CHECK DESCRIPTION PAGE
Complete supply Check that the motor supply includes all the components, that are in the detailed list 13
Check the proper installation of your motor ( the center of the transom). 13
Right installation Check the proper mounting height of your motor. 13
Check the tightness of the clamp screws. 13
Fuel Check the conformity of the fuel and of the oil to the detailed list. 15
Check of the equipment on board Check that you have on board everything necessary to face a possible emergency.
Before leaving always check your motor to make sure that it is
in a perfect state of efficiency, check its proper and safe
functionality. Failure to check as shown in the chart could
result in severe injury to people or damage to the boat.
If you ever have a question about the operation of your
outboard motor, or if you should find any kind of anomaly, please
consult a SELVA MARINE dealer. The time which is needed to check
your motor is very modest, but the safety, that you obtain from it is
enormous.

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Check of the supply.
When you receive your motor, check that:
- the packing is integral
- the supply corresponds to the detailed list:
1. the entire motor
2. tool-bag
3. use and maintenance manual
4. certificate of guarantee
5. motor cover
- that there is no evident damage. If there is a damage or if parts are
missing, you must inform immediately and in detail the forwarding-
agent, SELVA joint-stock CO. or its area agents. Picture No. 25.
Check that the registration book, the certificate of guarantee
and the CE declaration conformity are duly filled in and signed,
and that the data written in them correspond to the data printed
on the engine’s label.
Outboard motor mounting
A good position of the motor on the transom is very
important to have an appropriate trim angle and therefore to obtain a good
performance from your boat.
To have the optimum mounting height of the outboard motor, you must
mount it so that the anti-cavitation plate is between the bottom of the boat
and a level of 2 cm below it and it is parallel to it.
If the mounting-height is too high, cavitation tends to occur and
consequently there will be a falling-off in the performance and
a probable overheating of the motor. If the mounting-height is
too low, the water-resistance will increase and thereby reduce
engine efficiency. Picture No. 26.
The motor must be vertical to the water surface and the
bracket mounted on a flat even surface and should be fully
supported by the top edge of the transom.
If the bracket is not fully supported or, if the transom height is
too low, a hard wood block should be securely fitted between
the bracket and the transom Picture No. 27.
Fix the engine in the correct position locking the clamp screws.
Picture No. 28.

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Trim angle adjusting
The trim angle is the inclination angle, that should be given to the motor in
order to obtain an optimal performance from your boat.
An improper trim angle does not only affect the performance of
your boat, but can also cause loss of control, which means
danger for the people on board.
While sailing the motor should be perpendicular to the water
surface, but the trim angle can be 3 degrees to 5 degrees.
If the trim angle is made too great, the buoyancy center of the
boat will shift towards the stern. In this condition, and if the
stability moment at the bow is large, the boat will tend to
"porpoise". If the trim angle is insufficient, the bow may
"plough", making the boat unstable.
When the boat is in stable trim it remains parallel to the water.
To adjust the trim angle proceed as follows:
− tilt up the motor;
− bloc the engine in the tilt position turning downwards the engine tilt
cam;
− remove the adjusting-rod and reposition the rod in the desired hole,
which allows the appropriate trim angle;
− lift the engine, unlock the tilt support bar and bring again the motor
in the vertical position, so that it leans on the adjustment pin;
Improperly distributed load on boat or in different positions, can
alter the ideal trim conditions.
You must adjust the trim angle when the engine is switched
off. Picture No. 29
Ensure the transom clamp screws are tightened securely

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FUEL
Fuel
The fuel used for the propulsion of internal combustion engines
is highly flammable and, in certain cases can become
explosive.
Refueling and maintenance operations must be done in a well-
ventilated area and with the engine stopped.
Do not smoke while refueling, keep away from sparks, flames,
or other sources of ignition, which could cause fire or
explosion.
Do not spill gasoline. If gasoline spills, wipe it immediately with
dry rags, before starting the motor .
Do not overfill the fuel tank, because gasoline expands with
the heat and the sun radiation.
Tighten the filler cap securely after refueling.
Do not let gasoline get into your eyes or onto your skin. Avoid
swallowing gasoline or inhaling its vapor. Do not pour fuel off
using a pipe.
KEEP OUT OF THE REACH OF CHILDREN
Gasoline
Use only un-leaded petrol with octane number 95 N.O.
Research or higher which do not contain alcohol.
In case the motor remains dry of fuel, in order to facilitate
the filling, press for some times the bulb of the primer on the
carburetor.
Picture No. 30
Oil mixture
Even if a 4 stroke, the motor is lubricated with oil for 2 strokes that
is mixed automatically to the gasoline and consumed when it is
used.
Even if the oil autonomy is remarkable, be always
sure of having in the tank a sufficient oil quantity.
For the oil mixture refuelling see following steps. All refuelling
and maintenance operations must be made when engine is
switched off.
•Remove the top cowling from the motor.
•Open the oil filler cap (the smaller tank) and use 2 stroke
oil as per below mentioned specifications. Fig. 31
Use synthetic oil mixture for 2 stroke motors
Type NMMA TC-W3 – SAE J 1536 GRADE 3
IF MOTOR IS RUNNING WITHOUT OIL, IT MAY
UNDERGO TO SEVERE DAMAGE.
Check that the oil used has the requested specifications

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STARTING
Verifications when the engine is OFF
check that the top cowling is properly locked.
Picture No. 32.
Make sure that the lock plate is installed on the engine kill
switch. Picture No. 33.
Starting procedures
THE MOTOR IS EQUIPPED WITH A STARTING DEVICE
EASY START WHICH FACILITATES THE STARTING.
To start the engine operate according to the following steps:
If your engine is cold, you have to pull the choke knob.
Picture No. 34.
Place the throttle-grip in the "start" position. Picture No. 35.
Pull the starter-handle slowly for 2 or 3 times . When the spring is
sufficiently charged it is unblocked authomatically and the engine starts.
Picture No. 36.
Set the choke knob to home position. Picture No. 37.
You don't need to use the choke-knob, if the engine is warm.
If the motor doesn't start after several attempts, you should refer
to the troubleshooting section.
Verifications when the motor is ON.
This motor is cooled with mixed air/water system. When
starting, with motor at idle the cooling is only by air and there
is no water circulation. By accelerating, when the graft of the
clutch that transmits the motion to the propelleris ingaged,
also the water cooling enters into action and, only with the
propeller in motion, in the back area of the motor the pilot
flow of the cooling circuit must be present.
Just after starting the motor, you should make sure :
- that you do not hear any strange noise;
- that the throttle-grip operates in a proper way;
- that the engine stop switch operates properly;
USE OF THE MOTOR
Your motor is equipped with a centrifugal clutch device
which engages automatically when a proper r.p.m.
is reached.
This system alows to have the propeller not engaged
both during starting and with motor at idle.
By accelerating the clutch engages and the propeller
starts working.

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RUNNING-IN PROCEDURE
A SELVA outboard motor is tested completely in our workshop and it is
partially run in a tank. A second test is done by the dealer. It is always
advisable to complete the running-in procedure in the following way:
During the first 3 running hours do not accelerate too much,
and during the following navigation hours you can accelerate
properly but only for short periods.
After about 20 hours you have to change entirely the gearbox-
oil (see the greasing sectioning in this manual).
A good running-in will allow you to obtain a good
performance from your motor and a longer life.
STOPPING PROCEDURE
Emergency stopping procedures.
In an emergency you must stop your motor by pulling the
engine stop switch lanyard.
To start the motor again you have to install the lock plate again
on the engine stop switch. Picture No. 38.
Stopping in normal conditions
Place the gear-shift lever in the neutral position " N " (neutral gear);
accelerate lightly in order to avoid flooding, run the engine again at idling
speed and then push the stop button. Picture No. 39.
OPERATING IN REVERSE GEAR
To run in reverse gear you need to turn the engine through 180°
compared to the normal position.
When the engine is in reverse position, the motor’s lift is automatically
prevented by a mechanism.
Use the engine in the reverse position only in manoeuvre
operations and at low r.p.m.
Removal of the motor from the boat
Each time that you need to remove the motor from your boat,
you must let it cool down and then carry out the following
operations :
- release the clamp screws.
- lift up the motor vertically and keep it in this position till all the water has
run out from the cooling-water passages ( about 1 minute )
- tilt up the steering tiller
- transport the motor using the proper handle.
- lay down the motor only on its back side. Picture No. 40.

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CLEANING
Cleaning outside
SELVA motors do not need much cleaning, to clean the painted parts use
a cloth soaked with water
Do not use flammable solvents.
Cleaning of cooling-water passages
Every now and then after using, clean the cooling-water passages, in
order to remove mud and salt, so that they do not affect the performance
of your motor.
You can carry out this cleaning operation in the following way:
Immerse the outboard motor without the propeller in a vessel filled up with
fresh-water, make sure that the water level is over the height of the water
inlets, to avoid causing irreparable damage to the motor. Shift the gear-
shift lever into neutral " N ". Start the engine and run at low speed for a few
minutes.
when you start the engine, the propeller shaft turns.
Operate carefully to avoid wounding. Never approach the
hands or other objects to the propeller shaft.
While cleaning the cooling water passages make sure that
water always circulates in the passages, checking its running
out of the pilot hole. Picture No. 41.
MAINTENANCE
Before doing any kind of maintenance or checking operation, switch off the
engine and wait till it has cooled down, then remove the spark plug cap, in
order to avoid an accidental staring.
Pay attention to the motor parts, which are still hot, so that you do not burn
yourself.
Some maintenance operations must be carried out by qualified staff.
Contact SELVA MARINE after-sale service.
The following chart lists the periodic maintenance operations to do on your
motor.
The pointed out operations must be done by qualified staff.