Yanmar 6LYA-STP User manual

OPERATIONMANUAL
Be sure to read this manuaI for safe and
proper operation．
Store this manual carefully after use．

Congratulations on your choice of
YANMAR product from YANMAR DIESEL ENGINE CO., LTD.
This manual describes operation, periodic inspection and
maintenance servicing for the ENGINE manufactured by
YANMAR DIESEL ENGINE CO., LTD.
Please read this manual carefully before use, and operate
your engine properly under the optimum conditions, should
you have any questions or concerns, please do not hesitate to
contact your nearest dealer or distributor.
California
Proposition 65 Warning
Battery posts, terminals, and related
accessories contain lead and lead
compounds, chemicals known to the
State of California to cause cancer and
reproductive harm.
Wash hand after handling
California
Proposition 65 Warning
Diesel engine exhaust and some of its
constitutions are known to the State of
California to cause cancer, birth defects,
and other reproductive harm.

_1_
Thank you for purchasing the YANMAR Marine Diesel Engine.
[INTRODUCTION]
●This Operation Manual describes the operation, maintenance and inspection
of the 6LYA-STP, 6LY2A-STP Yanmar marine diesel engines.
●Read this Operation Manual carefully before operate the engine to ensure that
the engine is used correctly and that it stays in the best possible condition.
●Keep this Operation Manual in a convenient place for easy access.
●If this Operation Manual is lost or damaged, order a new one from your dealer
or distributor.
●Make sure this manual is transfered to subsequent owners. This manual
should be considered a permanent part of the engin and remain it.
●Constant efforts are made to improve the quality and performance of Yanmar
products, so some details included in this Operation Manual may differ slightly
from your engine. If you have any questions about such difference, please
contact your Yanmar Dealer or Distributor.
●For detailed information marine gears other than model KMH6A/ KMH6A1,
refer to the Marine Gear Operation Manual.
YANMAR
MARINE DIESEL ENGINE
MODELS
:6LYA-STP, 6LY2A-STP
OPERATION MANUAL
Operation Manual
(Marine Engine)
Models
Code No.
6LYA-STP, 6LY2A-STP
49961-205581

_2_
INTRODUCTION …………………………………………………………………………………………………………………………………………………………………………………………………………1
INDEX …………………………………………………………………………………………………………………………………………………………………………………………………………………………………………2
1. FOR SAFE OPERATION ………………………………………………………………………………………………………………………………………………………………3~6
1.1 Warning Symbols …………………………………………………………………………………………………3
1.2 Safety Precautions ……………………………………………………………………………………………4~5
1.3 Location of product safety Labels ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯6
2. EXPLANATION OF PRODUCT…………………………………………………………………………………………………………………………………………7~16
2.1 Use, Driving System etc. …………………………………………………………………………………………7
2.2 Engine Specificitions ……………………………………………………………………………………………8
2.3 Names of Parts ……………………………………………………………………………………………………9
2.4 Major Servicing Parts……………………………………………………………………………………………10
2.5 Control Equipment …………………………………………………………………………………………11~17
2.5.1 Control panel ……………………………………………………………………………………………11˜15
2.5.2 Remote Control Handle ……………………………………………………………………………………16
3. OPERATION ……………………………………………………………………………………………………………………………………………………………………………………………………17~32
3.1 Fuel oil, Lube oil & Cooling Water…………………………………………………………………………17~19
3.1.1 Fuel …………………………………………………………………………………………………………17
3.1.2 Lube oil ………………………………………………………………………………………………………18
3.1.3 Cooling Water …………………………………………………………………………………………18˜19
3.2 Before lnitial Operation ……………………………………………………………………………………20~24
3.2.1 Supplying Fuel and Bleeding Air in the Fuel System …………………………………………………20
3.2.2 Supplying Engine Lube oil …………………………………………………………………………………21
3.2.3 Supplying lube oil to marine gear (for Yanmar model : KMH6A KMH6A1) …………………………22
3.2.4 Supplying Cooling Water ………………………………………………………………………………22˜23
3.2.5 Starting after storage or new engine ……………………………………………………………………23
3.2.6 Checking and Resupplying Lube Oil and Cooling Water ………………………………………………24
3.3 How to Operate ……………………………………………………………………………………………25~30
3.3.1 Inspection before Starting ……………………………………………………………………………25~27
3.3.2 How to Start the Engine ………………………………………………………………………………27˜28
3.3.3 Shifting ………………………………………………………………………………………………………29
3.3.4 Checking during Operation ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯29~30
3.3.5 Stopping the Engine ………………………………………………………………………………………30
3.4 Long Term Storage ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯31~32
4. MAINTENANCE & INSPECTION ………………………………………………………………………………………………………………………………33~45
4.1 General Inspection Rules ………………………………………………………………………………………33
4.2 Periodic Inspection …………………………………………………………………………………………34˜35
4.3 Periodic Inspection Items …………………………………………………………………………………36~45
4.3.1 Inspection after Initial 50 Hrs. Operation ……………………………………………………………36~37
4.3.2 Inspection Every 50 Hours ……………………………………………………………………………37~38
4.3.3 Inspection after First 250 Hrs. ……………………………………………………………………………39
4.3.4 Inspection Every 250 Hrs. (or 1 yr.) …………………………………………………………………39~43
4.3.5 Inspection Every 500 Hrs. (or 2 yrs.) ……………………………………………………………………43
4.3.6 Inspection Every 1000 Hrs. (or 4 yrs.) ………………………………………………………………43~44
4.3.7 Inspection Every 2000 Hrs.……………………………………………………………………………44~45
5. TROUBLESHOOTING……………………………………………………………………………………………………………………………………………………………………46~47
6. SYSTEM DIAGRAMS ……………………………………………………………………………………………………………………………………………………………………48~51
6.1 Piping diagram …………………………………………………………………………………………………48
6.2 Wiring diagram ………………………………………………………………………………………………49~51
INDEX
page No.

_3_
1. FOR SAFE OPERATION
1.1 Warning Symbols
These are the warning signs which are used in this manual and on the products.
Pay special attention to them.
DANGER- Indicates an imminently hazardous situation
which, if not avoided, WILL result in death or serious
injury.
WARNING- Indicates a potentially hazardous situa-
tion which, if not avoided, COULD result in death or
serious injury.
CAUTION- Indicates a potentially hazardous situation
which, if not avoided, MAY result in minor or moderate
injury. It may also be used to alert against unsafe
practices.
●The descriptions captioned by [NOTICE] are for the particularly important cautions for
handling. If you ignore them, the performance of your machine may deteriorate leading to
trouble.
Following the precautions described in this manual will enable you to use this engine with complete
satisfaction. Failure to observe any of the rules and precautions, however, may result in injury,
burns, fires, and engine damage. Read this manual carefully and be sure you fully understand it
before beginning operation.
DANGER
WARNING
CAUTION

_4_
1.2 Safety Precautions
Burns from Scalding
●Never remove the filler cap of the fresh water cooler while the engine is still hot.
Steam and hot water will spurt out and seriously burn you. Wait until the water
temperature has dropped, then wrap a cloth around the cap and loosen it slowly.
●After inspection, refasten the filler cap firmly. If the cap is not secure, steam or
scalding water may be emitted during operation causing burns.
Proper Ventilation of the Battery Area
●Be sure the area around the battery is well-ventilated and there is nothing which
could start a fire. During operation and charging, hydrogen gas is emitted from
the battery and can be easily ignited.
Fires from Oil Ignition
●Be sure to use the correct type of fuel when refueling.
Mistakenly filling with gasoline or the like will result in ignition.
●Be sure to stop the engine before refueling.
If you spill fuel, wipe such spillage carefully.
●Never place oils or other flammable material close to the engine as this could
result in ignition.
Exhaust Gas Poisoning
●Be sure to establish good ventilation in the engine room with windows, vents, or
other ventilation equipment. Check again during operation to be sure that venti-
lation is good. Exhaust gas contains poisonous carbon monoxide and should
not be inhaled.
Moving Parts
●Do not touch the moving parts of the engine (propeller shaft, V-belt, PTO-pulley,
etc.) during operation or let your clothing get caught in them as this can result in
injury.
●Never operate the engine without the covers on the moving parts.
●Check before starting the engine to see that any tools or cloths used in mainte-
nance have been removed from the area.
Burns from Contact with Hot Engine Parts
●The whole engine is hot during operation and immediately after stopping.
The turbocharger, exhaust manifold, exhaust pipe, and engine are very hot. Never
touch these parts with your body or clothing.
DANGER
DANGER
DANGER
WARNING
WARNING
■Precautions for Operation
(Observe these instructions for your own safety.)
CAUTION

_5_
Disposal of waste materials
●Put oil or liquids to be disposed in a container. Never dispose of waste oil or other fluids
outside, in a sewer, river, or the sea.
●Treat waste materials safely observing all regulations and laws. Ask a waste recovery
company to collect and dispose of it.
Do not alter the diesel engine.
Rebuilding the engine or altering parts to increase the speed or the amount of fuel discharged,
etc. will make operation unsafe, and result in damage and shortening of engine life.
Alcohol
●Never operate the engine while you are under the influence of alcohol or when
you are ill or feel unwell as this results in accidents.
Battery Fluid
●Battery fluid is diluted sulfuric acid. It can blind you if it gets in your eyes, or burn
your skin. Keep the fluid away from your body. Wash it off immediately with a
large quantity of fresh water if you get any on you.
Fire due to Electric Short-Circuits
●Always turn off the battery switch or detach the earth cable (--) before inspecting
the electrical system. Failure to do so could cause short-circuiting and fires.
Precautions for Moving Parts
●Stop the engine before you service it. lf you must inspect while the engine is
operating, never touch moving parts. Keep your body and clothing well clear of
all moving parts as this could result in injury.
Precautions for Removing Hot Oil and Water to
Prevent Burns
●If extracting oil from the engine while it is still hot, do not let the oil splash on you.
●Wait until the temperature has dropped before removing cooling water from the
engine to avoid getting scalded.
CAUTION
DANGER
WARNING
WARNING
WARNING
■Safety Precautions for Inspection
[NOTICE]
[NOTICE]

_6_
To insure safe operation, warning device labels have
been attached. Their location is shown in the
diagram below. Keep the labels from becoming dirty
or torn and replace them if they are lost or damaged.
Also, replace labels when parts are replaced,
ordering them in the same way as for the parts.
WarningDeviceLabels,PartsNumbers
No. Part Code No.
①128296-07300
②120324-07240
③128296-07260
④128296-07350
1.3 Location of Product Safety Labels
Name plate

_7_
2. Explanation of Product
In the case of engine with marine gear, connect the propeller shaft to the marine gear
output shaft.
In order to obtain full performance from your engine, it is imperative that you check the
size and structure of the hull and use a propeller of the appropriate size.
The engine must be installed correctly with safe cooling water and exhaust piping and
electrical wiring.
To handle the drive equipment, driven systems (including the propeller) and other
onboard equipment, be sure to observe the instructions and cautions given in the
operation manuals supplied by the shipyard and equipment manufacturers.
The laws of some countries may require hull and engine inspections, depending on the
use, size and cruising area of the boat.
The installation, fitting and surveying of this engine all require specialized knowledge and
engineering skills.
Consult Yanmar's local subsidiary in your region or your distributor or dealer.
Never modify this product or release the limit devices (which limit engine speed, fuel
injection quantity, etc.). Modification will impair the safety and performance of the
product and functions and shorten the product life.
Please note that any troubles arising from modification of the product will not be
covered by our warranty.
2.1 Use, Driving System, etc.
WARNING

_8_
(Note) 1. Rating condition : ISO 3046-1, 8665 2. 1hp = 0.7355 kW
3. Fuel condition : Density at 15˚C = 0.860, Fuel oil temperature *: 25˚C at the fuel injection pump inlet
**: ISO 8665 (Fuel oil temp. 40˚C at the fuel injection pump inlet)
2.2 Engine Specifications
Engine model 6LYA-STP
Type Vertical water cooled 4-cycle diesel engine
No. of clinders 6
Bore ×Stroke mm 100×110
Displacement 5.184
Fuel stop power at crankshaft
kw(hp)/rpm *272 (370) / 3300
**264 (359) / 3300
Cont. power at crankshaft.
kw(hp)/rpm 213 (290) / 3100
High idling rpm 3720±25
Low idling rpm 700±25
Combustion system Direct injection
Starting system Electric starting
Cooling system Fresh water cooling
Lubrication system Forced lubrication system with gear pump
Direction of rotation (crankshaft) Counter clockwise (viewed from flywheel side)
Lube oil capacity 20
18(including oil filter capacity)(oil pan 16.4)
Cooling water capacity Engine:20, Subtank :1.5
Turbochager RHC7W (IHI made)
Water cooled turbine housing
Dry mass(gear less) kg 530
Recommended battery capacity 12V×120Ah
Recommended type of remote control
handle Single lever type
Engine installation style On the flexible engine mount
6LY2A-STP
105.9×110
5.813
*324 (440) / 3300
**315 (427) / 3300
257 (350) / 3100
3670±25
535
Model
Type
All
Oil pan
Model KMH6A HSW800A2 MG5050A
Type 10°Angle 8°Angle 10°Angle
wet and multi-disc
Reduction ratio 1.58 1.2 1.12
Lube oil
capacity
4.0 Refer to the maker's manual
0.3
2.261.92 2.52.01.61.4 2.52.041.81.5
Full
Effective
Model KMH6A1 MG5061A
Type 10°Angle 7°Angle
wet and multi-disc
Reduction ratio 1.58 1.13
Lube oil
capacity
4.0 Refer to the maker's
manual
0.3
Full
Effective
2.261.92 2.472.001.751.54
●●
Marine gear (Option)
●●
For 6LYA-STP
●●
For 6LY2A-STP
(Note)
Reduction ratio:
Both ahead and astern

_9_
〈Note〉 This illustration shows Yanmar marine gear (Model : KMH6A) when it has been attached.
2.3 NAMES OF PARTS
Turbo charger
Lube oil cooler
for marine gear
Lube oil filter
Fresh water tank
Inter cooler
Fuel oil filter
Fuel oil injection
pump
Lube oil cooler
Marine gear
Fuel oil filter
Fresh water filler cap
Lube oil filter
Fresh water tank
Marine gear
Turbo charger
Dip stick
Fresh water cooler
Alternator
Sea water pump
V-belt
Engine oil filler cap
Starter motor
Fresh water filler cap

_10 _
2.4 Major Servicing Parts
Name of Part Function
●Fuel filter
Removes dust and water from fuel. Drain the filter periodically, (there is a
drain plug at the bottom). The internal element (filter) should be changed
periodically.
●Fuel feed pump Feeds fuel to the fuel injection pump.
Equipped with mechanical pump attached with the fuel injection pomp.
●Engine oil filler cap Filler port for engine lube oil.
●Lube oil filters
(Full-flow & by-pass)
Filters fine metal fragments and carbon from the lube oil.
The oil through the full flow filter is sent to the engine's moving parts and
another ones through the by-pass filter returns to oil pan.
［Cooling Water
System]
●Fresh water cooler
○Filler cap
○Sub tank
○Rubber hose
●Fresh water pump
●Seawater pump
This engine has two cooling water systems (for fresh water & for seawater).
Fresh water flows from the fresh water tank into the fresh water cooler, where
the fresh water is cooled by sea water.
The fresh water then flows into the cylinder block throgh the fresh water pump.
It further cools the turbocharger and goes back to the fresh water tank.
The fresh water cooler is a heat exchanger using sea water.
The filler cap mounted on the fresh water tank has a pressure regulating
valve.
When the cooling water temp. rises and then the pressure rises inside the
fresh water tank, the pressure regulating valve releases vapor and hot water
overflow to the sub tank.
The hose is connected betweev the filler cap and sub tank. Vapor and hot
water discharged to the sub tank.
When the engine stops and cooling water cools, the pressure in the cooling
water tank also drops to negative pressure. The filler cap valve then opens to
suck water back from the sub tank. This minimizes cooling water
consumption.
The centrifugal water pump circulates fresh cooling water inside the engine.
The pump is driven by the V-belt.
The rubber impeller-type pump is driven by gears. Do not operate it without
seawater, due to damage the impeller.
●Oil cooler This heat exchanger cools high temp. engine oil by seawater.
●Turbocharger
The pressurized intake air feeding device: the exhaust gas turbine is rotated
by the exhaust gas, and the power is used to rotate the blower. This
pressurizes the intake air for sending to the cylinder.
●Inter-cooler This heat exchanger cools the pressurized intake air from the turbocharger
with seawater.
●Anticorrosive zinc
The metal area of the seawater cooling system is prone to electrical
corrosion. The anti-corrosive zinc is installed in the oil cooler, inter-cooler,
etc. to prevent this.
The anti-corrosive zinc is itself reduced over time by electrical corrosion, so it
must be replaced at fixed intervals before it is completely consumed in order
to ensure that the metal area of the seawater cooling system remains fully
protected.
●Name plate Name plates are provided on the engine and have the model, serial number
and other data.
●Starter Starter powered by the battery.
●Alternator Rotates by belt drive, generates electricity and charges the battery.

_11 _
The control equipment consists of the control panel and remote control handle, which are
connected by the wires and cables to the control levers for remote control operation.
2.5.1 Control Panel (Optional)
The control panel has the following gauges and alarm devices (optional accessories):
2.5 Control Equipment
No. Model New B-type New C-type New D-type
7
Switch unit
Key switch (Starter switch) ●●●
8Engine stop switch ●●●
10 Alarm buzzer ●●●
9Alarm buzzer stop switch ●●●
11 IIIumination switch for meters ●●●
6
Battery not charging ●●●
C.W. high temperature ●●●
L.O. low pressure (engine) ●●●
C.W level ●●●
Exhaust ●●●
Boost ─●●
1Tachometer unit Tachometer with hour meter ●●●
4
Sub meter unit
LO. pressure meter ─●●
3C.W. temperature meter ─●●
5Boost meter (Turbo) ──●
12 Clock unit Quartz clock ●
(optional)
●
(optional) ●
Alarm lamp unit
●New B-type
x100/min
ENGINE HOURS
10
20 30
40
50
BATTERY
CHARGE
C.WATER
TEMP
LUB.OIL
PRESS.
EXHAUST
C.WATER
LEVEL
DIESEL
PREHEAT
61911
210 7
8
GLOW
OFF ON
START
SET OFF
BUZZER
STOP
ILLUML
O N
STOP
0
01
00h
0
●Avalable, −Not avalable

_12 _
●New C-type
GLOW
OFF ON
START
SET OFF
BUZZER
STOP
ILLUML
ON
0
0
x100/mi n
ENGINE HOURS
0
10
20 30
40
50
1
00
BATTERY
CHARGE
C.WATER
TEMP
LUB.OIL
PRESS.
C.WATER
LEVEL
LUB.OIL
FILTER
EXHAUST
C
LHH
C.W. TEMP
L.OILPRESS.
CLUTCH
OIL.P.
STOP
431911
8
6210
7
DIESEL
PREHEAT BOOST
●New D-type
●Available switches (for alarm) and senders (for meter) (attached with engine)
SET OFF
BUZZER
STOP
ILLUML
ON
GLOW OFF ON
START
0
0
x100/min
ENGINE HOURS
0
10
20 30
40
50
1
00
BATTERY
CHARGE
C.WATER
TEMP
LUB.OIL
PRESS.
C.WATER
LEVEL
LUB.OIL
FILTER
CLUTCH
OIL.P. EXHAUST
CH
C.W.TEMP
LH
L.OILPRESS.
HM
STOP
BOOST
01234
5431911 8
612 210 7
BOOST
DIESEL
PREHEAT
6LYA-STP 6LY2A-STP
Switches
Battery not charge ○○
C.W.high temperature ○○
L.O low pressure ○○
C.W.level ×△
Exhaust (C.S.W flow) ×△
Boost ×△
Senders
Tachometer ○○
C.W. temperature △△
L.O.pressure △△
Boost △△
C.W.temp. △△
L.O. press. △△
○: Standard △: Optional ×: Not available
For two stations

_13 _
(1) Gauges and Equipment
Gauges & Equipment Functions
Starter switch OFF: The switch key can be inserted or removed.
All power is turned off.
ON: For engine operation. Gauges and alarm devices are turned on.
START: For engine starting. When the key is released after starting, it
moves automatically to ON.
GLOW: For the air heater (optional)
(Note) ●The engine cannot be stopped by the starter switch.
Engine stop switch
Press the button to stop the engine by fuel cut.
And continue to push the stop button until the engine has come to a
complete stop.
Alarm buzzer The buzzer sounds if an abnormality arises.
See explanation under (2).
Warning lamps The lamps come on when an abnormality arises.
See explanation under (2).
Buzzer stop switch The switch is used to stop the buzzer noise temporarily. Do not turn the
buzzer off except when inspecting for an abnormality.
Illumination switch Switch for lighting control panel.
Hour meter Total operation hours are shown in the window below the tachometer.
Refer to the figure as a standard for periodic inspections.
Lube.Oil. pressure
meter The needle shows engine oil pressure.
Cooling water
temperature meter The needle shows engine cooling fresh water temperature.
Boost meter The needle shows intake air pressure (intake air boost pressure of
turbocharger.)
Heat up indicating
lamp for air heater
The lamp comes on when the air heater is heated up to start the engine
easily under low temperature condition. (Refer to 3.3.2(3))
(The lamp is located in warning lamp display column.)
Before starting
during operation
Release your
hold when
engine
engine is
started
GLOW OFF ON
STSRT
DIESEL
PREHEAT

_14 _
(2) Functions of Alarm Devices (Alarm Buzzer & Lamps)
1) The alarm buzzer sounds when any warning lamp (except the charge lamp) comes on.
2)
Warning lamps come on when sensors (switchs) detect an abnormality during engine operation.
The warning lamps in the display column of the control panel are off during normal operation,
but come on as follows when an abnormality arises:
Charge Lamp
The lamp comes on when there is a charging failure. The alarm buzzer
does not sound. Check for breakage in the alternator V-belt
Cooling Water Temp. Warning Lamp
The lamp comes on when the cooling water (LLC) gets too hot.
Check the water level in the sub-tank and cooling water tank, and the
discharge volume of the cooling seawater.
Lube Oil Pressure Warning Lamp
The lamp comes on when the engine lube oil pressure drops.
Check the engine oil level.
Cooling Water Level Warning Lamp.
The lamp comes on when the cooling water (LLC) in the cooling water tank
falls below the normal level.
Check the cooling water level in the cooling water tank.
Exhaust : Cooling seawater Discharg Warning Lamp.
The lamp comes on when the cooling seawater flow becomes too small.
Check for clogging in the seawater cooling system.
Boost Pressure Warning Lamp
The lamp comes on when the intake air boost pressure (intake air boost
pressure of turbocharger) rises abnormaly.
BATTERY
CHARGE
C.WATER
TEMP
LUB.OIL
PRESS.
C.WATER
LEVEL
EXHAUST
BOOST
(3) Functions of Warning Devices
When the key switch is turned on, the alarm devices functions as follows
1) Turning the key to ON :
①Warning buzzer sounds
②The BATTERY CHARGE, LUB. OIL PRESS. and EXHAUST lamps come on.
(Note) When the warning buzzer and lamps function as above, everything is normal.
2) When the key switch is turned to START to start the engine and then returned to ON after
the engine starting up.
①The warning buzzer stops sounding.
②All warning lamps go off. After the engine starts up, make it the rule to check alarm
devices. If they do not work normally, contact your dealer.
①
②
③
④
⑤
⑥

_15 _
Function of Alarm Devices
Alarm Buzzer On Off
Alarm Lamps
Charge Lamp On Off
Cooling Water Temperature Off Off
Engine Oil Pressure On Off
Cooling Water Level Off Off
Exhaust On Off
Boost Off Off
Before starting
OFF
→ON
After Starting
START
→ON
Key Operation

_16 _
2.5.2 Remote Control Handle
Use the remote control handle in the steering room for ahead, astern and speed control.
●OperationofSingleLeverRemoteControlHandle(Option)
①: The marine gear shift lever is in neutral.
②: The marine gear shift lever is in ahead
or astern
③: Engines max. speed position.
②〜③: Acceleration position

Throughoutknob
whenfreeslottle

Sidemounttype

Remotecontrolhandle

Throughoutknob
whenfreeslottle

Neutral
Ahead or Astern
Max Speed
to marine gear shift lever.
to engine governor lever.
Reverse Ahead
Neutral
Neutral
Ahead Reverse
to marine gear shift lever.
to engine governor lever.
to marine gear shift lever.
to engine governor lever.
ME
M
E
M
E

_17 _
3.1.1 Fuel
(1) Selection of fuel
Use the following diesel fuels for best engine performance:
ISO8217 DMA, BS2869 A1 or A2
(2) Fuel Handling
1)Water and dust in the fuel oil can cause
operation failure.
Use containers which are clean inside to store
fuel oil. Store the containers away from rain
water and dust.
2)Before supplying fuel, let the fuel container
rest for several hours so that water and dust
in the fuel are deposited on the bottom. Pump
up only the clean fuel.
3)Use fuel with a Cetane number of over 45.
4)When supplying fuel to a new boat for the
first time, be sure to extract all fuel from the
F. O. tank and check for impurities in the fuel.
(3) Fuel piping
Install the piping between the fuel tank and the
engine's fuel injection pump, as illustrated on
the right.
Be sure to install a drain cock at the bottom of
the fuel tank to remove water and dust.
Install an oil/water separator and a fuel filter in
the middle of the fuel piping.
Use of fuels not recommended in this Operation Manual may cause a decrease in
engine performance and cause components to fail.
[NOTICE]
Fuels equivalent to Japanese Industrial Standard, JIS. No. K2204-2
Fuel oil strainer Fuel oil return pipe
Fuel oil primiing pump of fuel feed pump
Oil/water separator
Fuel oil tank
Drain cock
Fuel oil cock
Less than 500mm
To fuel oil injection pump
Approx. 50 mm
Cetane fuel number should be 45 or greater
Pump up only fuel above the down half, leaving
dreg accumulated on the bottom.
3. OPERATION
3.1 Fuel Oil, Lube Oil & Cooling Water

_18 _
3.1.2 Lube oil
(1) Selection of Engine Lube Oil
Use the following lube oil:
●API CD SAE Viscosity ……… 30
●SAE Viscosity……………15W40
(2) Selection of Oil for marine gear.
●Yanmar KMH6A, KMH6A1…SAE Viscosity 30
Follow the instructions for other types of Marine
Gear.
(3) Handling the Lube Oil
1) When handling and storing lube oil, be careful
not to allow dust and water to enter the Iube
oil. Clean around the filter port before refilling.
2) If lube oil of different brands are blended, the
quality of lube oil may deteriorate. To prevent
this, do not mix the lube oil.
3) Lube oil supplied to the engine will undergo
natural degeneration with time even when the
engine is not used.
Lube oil should be replaced at the specified intervals regardless of whether the engine is
being used or not.
3.1.3 Cooling Water
UseofIubeoilsnotspecifiedinthisoperationmanualmaycausetheseizureor
prematurewearofinternalpartsandshortentheengineslife.
[NOTICE]
AIR TEMPERATURB
Single grade Multi grade
SAE 30
SAE 40
SAE 20W40
SAE 15W40
SAE10W
SAE 10W20
SAE SW20
SAE 15W30
50
40
30
20
10
0
5
10
15
20
30
35
40
55
25
104
86
68
50
32
23
14
5
4
13
22
31
40
67
F
C
122
Be sure to add Long Life Coolant /Antifreeze (LLC) to cooling fresh water.
In cold seasons, the LLC is especially important.
Without LLC, cooling performance will decrease due to scale and rust in the
cooling water line. Without LLC, cooling water will freeze and expand, breaking
various parts.
IF YOU OPERATE YOUR EOUIMENT AT TEMPERATURES BELOW
THE LIMITS SHOWN, CONSULT YOUR DEALER FOR SPECIAL
LUBAICANTS AND STARTING AIDS.
[NOTICE]