SELVA MARINE Oyster 5 User manual

Zadar - Capri
OWNER'S MANUAL
Oyster 5
Oyster 6
Black Bass 7,5

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 favourite 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
authorised 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 should 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 more
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.
MODEL
SERIAL NUMBER

4
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
Fuel...............................................................................15
Fuel ...............................................................................15
Type of fuel ...................................................................15
Fuel tank clamping and pipes connection.....................15
Starting ........................................................................16
Verifications before starting the motor ..........................16
Starting procedures.......................................................16
Verifications when the motor is on................................16
Emergency starting procedures................................17
Running-in procedure ...................................................17
Stopping procedure....................................................17
Emergency stopping procedures ..................................17
Stopping in normal conditions.......................................17
Stopping for a long period of storage............................ 18
Shallow water cruising...............................................18
Removal of the motor from the boat ............................. 18
Cleaning.......................................................................19
Cleaning outside ...........................................................19
Cleaning cooling-water passages.................................19
MAINTENANCE.............................................................19
Introduction ...................................................................19
Periodic inspections and adjustments chart ................. 20
Greasing chart .............................................................20
Greasing and additions.................................................21
Motor oil........................................................................ 21
Motor oil change............................................................21
Gearbox oil.....................................................................21
Gearbox-oil change.......................................................21
Spark-plug.....................................................................21
Sacrificial anode............................................................22
Motor oil filter replacement.............................................22
Replacement of the propeller........................................22
Storage .........................................................................23
TROUBLESHOOTING................................................... 24
Troubleshooting chart ...................................................24
EXPLANATORY PICTURES .........................................26

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.
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.

6
PAY ATTENTION TO THE PROPELLER
The propeller is certainly the least 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 inclination angle of your motor using the
steering rod, but use the proper handle.
Picture No. 7.
The motor must always have its top cowling on, when it is
operating
Picture-No. 8.
When you connect the fuel joint, check the proper connection.
Picture No. 9.
When starting there must be nobody within the engine
operator's action radius. Picture No. 10.
There must be nobody within the motor steering radius.
Picture No. 11.
The free lock lever must always be engaged while the motor is
in motion.
Never tilt-up the motor out of the water, while it is in motion.
Picture No. 12.
Never pull the recoil starter handle, while the motor is running.
Picture No. 13.
To transport the motor use only the proper handle.
Before transporting the motor you have to tilt-up the steering
rod properly.
The fuel tank is also provided with a handle to use for the
transport. Picture No. 14.
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.
When opening the safety valve of the fuel tank, highly
flammable vapours come out. Do not smoke, inhale or use
open flames close to it.

7
If the motor has had an accident, you should have it fully
checked, before you use it again. If necessary let the SELVA
MARINE authorised 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 craft.
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.

8
SPECIFICATIONS
MODEL OYSTER 5 – F135A OYSTER 6 – F135 B BLACK BASS 7,5 – F165 A
POWER 5HP / 3,7 Kw 6HP / 4,4 Kw 7,5HP / 5,5 Kw
FULL THROTTLE OPERATING RANGE 5000/5500 5500/6000 5500/6000
PISTON DISPLACEMENT 135 135 165
BORE X STROKE 57x53 57x53 63x53
NUMBER OF CYLINDER 1 1 1
ENGINE TYPE cycle eight - 4 stroke
FUEL PUMP N° 1 Mechanical pump
AVERAGE CONSUMPTION 1,2 litres/hour 1,5 litres/hour 1,9 litres/hour
FUEL Petrol min 95 octans RON
FUEL TANK Separatated lt 12 (incorporated lt. 1.7) Separatated lt 12
RECOMMENDED ENGINE-OIL 4 Stroke Motor oil API SE, SF,SG,SH,SJ - SAE 10W-30;10W-40; 15W-40
OIL QUANTITY 600gr.
SPARK LEAD electronic automatic programmed with the engine revolutions
STARTING manual with rope, which returns automatically on the pulley
SPARK PLUGS Champion RAX96C – Bosch XR 5 DC – NGK DPR6EA-9
EXHAUST submarine depression-working through the propeller-hub
COOLING water cooling with forced circulation caused by a NGK pump
PROPELLER REDUCTION RATIO 13/30
GEAR SHIFT LEVER forward gear - neutral gear - reverse gear + shaft rotation of 360°
RECOMMENDED GEARBOX-OIL OUTBOARD MOTOR GEARBOX OIL - API GL-5 SAE 80W/90
GEARBOX-OIL QUANTITY 200 gr.
PROPELLER TYPE anti-weed with three blades
TRIM ANGLE ADJUSTING 5 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 27 - long shaft 27,5
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. 15 for the dimensions of your motor.

9
LOCATION OF MAIN COMPONENTS
See picture No. 16
N° DESCRIPTION
1 Tilt-up handle and air intake
2 Back cowling lock lever
3 Oil filling plug / motor oil level
4 Transport handle
5 Steering adjustment
6 Engine stop switch / Stop button
7 Trim angle adjusting-rod
8 Anti-cavitation plate
9 Propeller
10 Water inlet
11 Swivel bracket
12 Accelerator grip
13 Throttle-control adjustment
14 Clamp-screws
15 Tilt lock lever
16 Choke knob
17 Gear-shift lever ( R = reverse gear ; N = neutral gear ; F = forward gear )
18 Fuel joint
19 Recoil starter handle
20 Cooling system warning lamp
21 Fuel tank cap (model with incorporated fuel tank only)
22 Fuel Cock (model with incorporated fuel tank only)
23 Oil draining plug

10
CONTROL FUNCTIONS
Gear-shift lever
Starting out from the position of neutral gear ( N ), turn the lever in
boat direction and you engage the clutch with the forward gear.
Turning it in the opposite direction, you engage the reverse gear
(R). Picture No. 17.
Push-button to stop the motor.
Pressing the stop button (red) the ignition circuit is broken and the
engine stops immediately. Picture No. 18.
Choke knob.
Pulling this knob it supplies a richer mixture required to start a cold
engine. Picture No. 19.
Fuel cock (integrated tank)
Turning the cock you open or close the fuel connection to the
carburator. Picture No.20
Fuel joint (separated tank)
Connecting the fast fuel joint, you connect the fuel hose to the fuel
tank. Picture No. 21.
Recoil starter handle.
Pulling this handle starts the engine.
Picture No. 22.
Emergency engine stop switch.
Swithc to stop the engine in an emergency.
Picture No. 23.
Throttle-control adjustment.
Device which permit to have a constant speed.
Picture No. 24.
Accelerator-grip/steering-handle.
Turn the grip to operate the accelerator, and move it sideways to
adjust the steering angle. Picture No. 25.
Cowling lock hook.
Cowiling blocking device. To remove the top cowling pul the lever
to the up side. When put the top cowling, pay attention that it
should placed correctly with the front hook inserted, than couple
the back hook and block pushing down the lever Picture No.
26.
Lever to control the anti capsize hook.
It control the engine blockage hook, to avoid the capsize caused
by the reaction to the propeller push during the reverse navigation.
Picture No.
27.
Clamp-screws.
Use them to clamp the outboard motor on the transom.
Picture No. 28.
Steering adjustment grip.
With it you can adjust the resistance to steering movement. Screw
it to increase resistance. Picture No. 29.
Shallow water lever.
It release the tilt support bar. Picture No. 30.
Trim angle adjusting-rod.
It can be positioned in different holes in order to obtain the
appropriate trim angle.
Picture No. 31.

11
Wiring diagram.
Legend
1 - Flywheel
2 - Ignition-coil
3 - Sparking plug.
4 - Emergency engine stop switch / Stop button
Picture No. 32.
SYMBOLS see picture No. 33.
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 - Outboard motor free lock.
5 - Opening level of the throttle.
6 - Warning against fire hazard.
7 - Starter-switch for engine.
8 - Button to stop the motor
9 – Indication fuel cock positionning

12
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
Right installation Check the proper installation of your motor ( the centre of the transom). 13
Check the proper mounting height of your motor. 13
Check the tightness of the clamp screws. 13
Fuel Check the conformity of the fuel to the detailed list. 15
Fuel hose connection Check the proper connection of the fuel hose. 15
Oil filling Check the motor oil level in the oil sump with the appropriate dipstick 22
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

13
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. fuel tank supplied complete with the fuel hose and fast
fuel joint ( for the motors with separate fuel tank )
3. tool-bag
4. use and maintenance manual
5. certificate of guarantee
6. declaration of conformity E.E.C.
- 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. 34
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. 35.
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. 36.

14
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
centre 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:
−close the safety valve of the fuel tank (for motors
with incorporated fuel tank );
−push down the free-lock lever and tilt up the motor ;
−remove the adjusting-rod and reposition the rod in
the desired hole, which allows the appropriate trim
angle;
−unlock the tilt support bar and bring again the motor
in the vertical position, so that it leans on the
adjustment pin;
−set the free-lock lever to the lock position;
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. 37
Ensure the transom clamp screws are tightened
securely
Picture No. 38.

15
FUEL
Fuel
The fuel used for the propulsion of internal
combustion engines is highly flammable and, in
certain cases can become explosive.
Refuelling and maintenance operations must be
done in a well-ventilated area and with the engine
stopped.
Do not smoke while refuelling, 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 refuelling.
Do not let gasoline get into your eyes or onto your
skin. Avoid swallowing gasoline or inhaling its
vapour. Do not pour fuel off using a pipe.
KEEP OUT OF CHILDREN REACH
Preparation of the fuel
Use only petrol with a octane number higher than 95
N.O. Research and that they not contain alcohol,
(see the detailed list)
Fuel tank clamping and pipes connection
Put the fuel tank horizontally in the hull, anchored to the
bottom, in a place where it does not hinder your movements
and so that the piping is long enough to reach the motor.
Then connect the piping to the fuel joint. Picture No. 39.
For this operation you have to insert the female fast fuel joint.
PictureNo.40.
Now you have to check the connection, pulling lightly the joint
(do not pull grasping the hose). Picture No. 41.
To release it is enough to pull the ring nut of the fast joint.

16
STARTING
Verifications before starting the motor
Check that the top cowling is locked, that the free-
lock mechanism is in the lock position and that the
gear-shift lever is in the neutral position ( N ).
Picture No. 42.
Make sure that the lock plate is installed on the
engine stop switch. Picture No. 43.
Starting procedures
Open the fuel cock (for integrated tank models) Picture No.44
Loose the safety valve on the fuel tank. Picture No. 45
Fill up the carburettor with fuel using the little hand pump ( you
have reached your aim, when the pump has become firm ). If
your engine is cold, you have to pull the choke knob.
Picture No. 46.
Place the throttle-grip in the "start" position. Picture No. 47.
Pull the starter-handle slowly so that the starter pinion engages
with the flywheel. Picture No. 48.
Set the choke knob to home position. Picture No. 49.
Pull the starter-handle powerfully until the engine starts. If
necessary, repeat the procedure. Picture No. 50.
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.
In case of start of the models with intagrate tank
following the stop of the engine caused from fuel
exaustion, after refueling pull the choke knob with
warm motor. This procedure make easier the filling of
the carburator
Verifications when the motor is on
Just after starting the motor, you should make sure that :
- after 5/10 seconds, water runs out from the cooling-
water pilot-holes. The indicator at the entrance of
the circuit, provides only for the proper operation of
the pump and not for the circulation of water in the
head and in the cylinder . That means that possible
shortages will not be indicated.
If water does not flow from the pilot-holes check to
see if the water-inlets are blocked. Picture No. 51;
- that you do not hear any strange noise;
- that the throttle-grip operates in a proper way;
- that the gear shift lever operates properly and that
with the reverse gear selected the motor does not
rise;
- that the engine stop switch operates properly;

17
Emergency starting procedures
If the starter does not operate, the engine may be started with
an emergency starter rope.
Carry out the following operations :
remove the cowling; place the gear-shift lever in the neutral
position " N ", and the throttle-grip in the start position and
check the installation of the lock-plate on the engine stop
switch. Remove the screws blocking the starter and remouving
it (it is necessary to detach the block start system with insterted
gear)
Insert the knotted end of the emergency starter rope into the
notch in the flywheel rotor, wind the rope two turns clockwise,
then pull strongly to start. repeat if necessary.
When starting the engine with the emergency starter
rope, it is very important to make sure that nothing
can get entangled in the engine. A rotating flywheel
is very dangerous. never try to replace the top
cowling when the engine is running. Proceed at once
to the nearest port to get the engine repaired. Take
care to prevent water splashing onto the flywheel.
While the emergency start, the starter block with
inserted gear is disabled. Before to start the engine, make sure
that the invester is in postition “N”.
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
concessionaire It is always advisable to complete the running
in procedure in the following way:
.During the first hour let run the motor to at 2000 rpm
(or at half acceleration).
During the second hour maintain it at 3000 rpm and
accellerate at max speed for 1 minute max each 10
min.
After this operation use the motor in a normal way.
After 10 hours change the motor oil. After 20 hours
change the gear oil (see the lubrification paragraph)
A good running in will allow you to obtain a good
performance from your motor and a longer
endurance of it.
STOPPING PROCEDURE
Emergency stopping procedures.
In an emergency you must stop your motor pulling the
engine stop switch lanyard.
To start the motor again you have to install again the
lock plate on the engine stop switch. Picture No. 52.
Stopping in normal conditions
Place the gear-shift lever in the neutral position " N "
(neutral gear); accelerate light in order to avoid
floodings, run the engine again at idling speed and then
push the stop button. Picture No. 53.

18
Stopping for a long period of storage.
If you don’t use the motor for many days, is preferable to stop
the engine in the following way:
When engione is cold, take out the spark plugs and spray
some c.c. of motor oil in the chylinder.
Set in action the starter, let make some movement to the
piston, re-install the spark plugs
SHALLOW WATER CRUISING
A SELVA motor is equipped with device, which adjusts the trim
angle so that you can sail in shallow water.
This operation must be carried out with the engine
not in motion and paying very much attention.
Cruising in shallows, run the boat at the lowest
possible speed.
Release the free-lock lever.
Close the safety valve of the fuel tank (for motors with
incorporated fuel tank).
Tilt up the engine till the first automatic stop using only the tilt
up handle.
To bring the engine to the home position, tilt up slightly the
engine (using always the proper handle), release the tilt
support bar, operating the shallow water levers and take the
motor again to its vertical position, then set the free lock lever
to the lock position.
Picture No. 54
Removal of the motor from the boat
Each time that you remove the motor from your boat,
you must let it cool down and then you have to do
the following operations :
- close the fuel cock
- disconnect the fast fuel joint.
- 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 rod.
- transport the motor using the proper handle.
- lay down the motor only in the specific position.
Picture No. 55.
If the engine will be placed in a wrong position,
the oil inside the oil sump may come out throught the
breather, smears the engine so that will be impossible to
use it and it risks to heavy damage the order.
Oil may come out from the engine