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6LPAseriesOPERATION MANUAL6LPA-STP26LPA-STZP2P/N: 0A6LP-G00101MARINEENGINES

SAFETY PRECAUTIONSGeneral InformationThere is no substitute for common senseand careful practices. Improper practices orcarelessness can cause burns,

It is recommended that any replacementparts used for maintenance, repair orreplacement of emission control systemsare Yanmar parts. The owner may elec

Owner’s Responsibility:As the Yanmar marine engine owner, youare responsible for the performance of therequired maintenance listed in yourOperation Ma

Maintenance LogDate OperatingHoursMaintenance Performed Dealer Name Stamp orSignature

Date OperatingHoursMaintenance Performed Dealer Name Stamp orSignature

98 6LPA Series Operation Manual© 2007 Yanmar Marine International

! WARNINGThe safety messages that follow haveWARNING level hazards.Explosion HazardWhile the engine is running orthe battery is cha

! WARNINGPiercing HazardAvoid skin contact with high-pressure diesel fuel spraycaused by a fuel system leaksuch as a broken fuel in

NOTICEThe safety messages that follow haveNOTICE level hazards.It is important to perform daily checks aslisted in the Operation Manual.Periodic maint

LOCATION OF SAFETY DECALSFigure 1 shows the location of safety decals on Yanmar 6LPA series marine engines.(1) (2) (3) (4)(5)0004813Figure 11 – Part N

PRODUCT OVERVIEWYANMAR 6LPA FEATURESAND APPLICATIONSThe 6LPA series are 6-cylinder, 4-strokedirect injection diesel engines equipped withliquid coolan

A new Yanmar diesel engine must beoperated at suitable speeds and powersettings during the break-in period to makethe sliding parts, such as piston ri

COMPONENT IDENTIFICATIONService Side (Left Side as Viewed from Propeller)Note: 6LPA-STZP2 with stern drive shown. Components marked with an * are for6

Non-Service Side(1)(2)(3)(4*)(5)(6)(7*)(8)(9)(10)(11)0004885Figure 21 – Turbocharger2 – Engine Nameplate (on rocker arm cover)3 – Fresh Water (Coolant

ENGINE NAMEPLATE//Gear ModelENG.No.//Modelmin-1min-1min-1Continuous power kWSpeed of prop,shaf tFuel stop power kW0004574Figure 3The nameplate o

Disclaimers:All information, illustrations and specifications in this manual are based on the latestinformation available at the time of publishing. T

FUNCTION OF MAJOR COMPONENTSName of Component FunctionFuel Filter Removes dirt and water from the fuel. The filter is a cartridge type, and theinner e

CONTROL EQUIPMENTThe control equipment at the helm makes remote control operation possible. It consists ofthe instrument panel, which is connected to

New B-Type(1) (2) (3) (4)(5)(6)(7)(8)0003281_m1Figure 41 – Warning Indicator Display2 – Tachometer3 – Alarm Stop Switch4 – Panel Illumination Switch5

New D-Type(1) (2) (3) (4) (5) (6) (7)(8)(9)(10)(11)(12)0003283_m1Figure 61 – Turbocharger Boost Pressure Gauge2 – Engine Oil Pressure Gauge3 – Fresh W

Available Alarm Switches and Meter Senders 6LPA-STP26LPA-STZP2SwitchesBattery Not Charging ○Fresh Water (Coolant) Temperature TooHigh○Engine (Lube)

Switches and GaugesSwitch or Gauge Function0003622(1)(2)(3)(4)Starter (Key) SwitchOFF (2): The key can be inserted or removed from switch. Allpower is

Warning DevicesWhen a sensor detects a problem duringoperation, the indicator on the instrumentpanel will light and an alarm will sound.Indicators are

Figure 11Fuel Filter (Water Separator) (Figure 11) -When the water level inside the waterseparator becomes too high, the sensor willsend a signal to t

AlarmsCheck that indicators and alarms are working normally when the key is turned to ON.Key Switch OFF ⇒ ON START ⇒ ONEngine Before starting RunningA

Engine Stop Button(1)0004881Figure 15Push and hold the stop button(Figure 15, (1)) on the instrument panel tostop the engine. When the stop button isp

TABLE OFCONTENTSPageIntroduction ... 1Record of Ownership ...

Remote Control (Throttle) HandleThe engine is controlled by the remotecontrol handle located in the cockpit. Thespeed control lever on the engine and

ReverseMove the handle from NEUTRAL to REV(reverse). This engages the clutch inreverse and simultaneously increases theengine speed. Pushing the handl

This Page Intentionally Left BlankPRODUCT OVERVIEW26 6LPA Series Operation Manual© 2007 Yanmar Marine International

BEFORE YOU OPERATEThis section of the Operation Manualdescribes the diesel fuel, engine oil andengine coolant specifications and how toreplenish them.

Additional Technical FuelRequirements• The fuel cetane number should be equalto 45 or higher.• The sulfur content must not exceed 0.5%by volume. Less

Fuel System0004489(1)(2)(3)(4)(5)(6)(7)(8)Figure 31 – Fuel Filter2 – To Fuel Injection Pump3 – Less than 500 mm (20 in.)4 – Fuel Cock5 – 20 - 30 mm (0

ENGINE OILEngine (Lube) Oil SpecificationsUse an engine oil that meets or exceeds thefollowing guidelines and classifications:API Service Categories C

Checking the Engine Oil(5)(1)(4)(2)(3)0004902Figure 61. It is recommended that the engine beas level as possible before checking theoil.2. Remove dips

MARINE DRIVE OILNote: Refer to the marine gearmanufacturer's operation manual for themarine gear oil specifications. Refer to themanufacturer&apo

ENGINE COOLANTEngine Coolant Specifications• Texaco Long Life Coolant (LLC), bothstandard and premixed, product code7997 and 7998.• Havoline Extended

Checking the Engine Oil ... 31Adding Engine Oil ... 31Marine Drive Oil ...

Checking and Adding EngineCoolant0004910(1)Figure 81. Ensure all drain cocks are closed.2. WARNING! NEVER remove the fillercap while the engine is hot

CRANKING THE ENGINEWhen performing engine break-in or if theengine has not been used for a long periodof time, engine oil will not be distributed toal

DAILY CHECKSBefore you start for the day, make sure theYanmar engine is in good operatingcondition. CAUTION! It is important toperform daily checks as

Checking the Wiring ConnectorsSee your authorized Yanmar marine dealeror distributor.Tightening All Major Nuts and BoltsSee Tightening Fasteners on pa

This Page Intentionally Left BlankBEFORE YOU OPERATE38 6LPA Series Operation Manual© 2007 Yanmar Marine International

ENGINE OPERATION ! WARNINGFire and Explosion HazardNEVER jump-start the engine.Sparks caused by shorting thebattery to the starter t

NOTICEIf any indicator illuminates during engineoperation, stop the engine immediately.Determine the cause and repair the problembefore you continue t

6. Turn the key switch to START(Figure 1, (4)). Release the key switchwhen the engine has started. NOTICE:NEVER hold the key in the STARTposition for

Restarting After Starting FailureBefore turning the key switch again, ensurethe engine has stopped completely. If anattempt to restart is made while t

2. MT-3: Pull out the handle lever(Figure 3, (4)) and adjust the speed tono more than 1500 rpm and run theengine at low speed with no load.3. MV: Pul

Tightening Fasteners ... 51EPA Maintenance Requirements ... 52EPA Requirements for USA

REMOTE CONTROLHANDLE OPERATIONAcceleration and DecelerationMT-3 Top Mount(1)(2)(3)(4)(5)(6)(7)0004886Figure 51 – Reverse High Speed2 – Reverse Low Spe

2. NOTICE: NEVER shift the marinegear at high engine speed. Duringnormal operation, the marine gearshould only be shifted with theengine at idle. Whe

7. Turn off the battery master switch (ifequipped).8. Close the fuel cock.9. Close the seacock (if equipped).NOTICE: Be sure to close theseacock. Negl

PERIODIC MAINTENANCEThis section of the Operation Manualdescribes the procedures for proper careand maintenance of the engine.SAFETY PRECAUTIONS

! WARNINGWelding HazardMake welding repairs safely.• ALWAYS turn off the battery switch (ifequipped) or disconnect the negativebatt

NOTICEAny part which is found defective as a resultof inspection, or any part whose measuredvalue does not satisfy the standard or limit,must be repla

Keep a Log of Engine Hours andDaily ChecksKeep a log of the number of hours the engineis run each day and a log of the daily checksperformed. Also not

Tightening FastenersUse the correct amount of torque when you tighten fasteners. Applying excessive torque maydamage the fastener or component and not

EPA MAINTENANCEREQUIREMENTSTo maintain optimum engine performanceand compliance with the EnvironmentalProtection Agency (EPA) Regulations forEngines,

Inspection and MaintenanceSee Inspection and Maintenance of EPAEmission-Related Parts on page 58 for theEPA emission-related parts. Inspection andmain

Your Warranty Rights and Obligations: ... 93Warranty Period: ... 94Warranty Coverage: ...

PERIODIC MAINTENANCE SCHEDULEDaily and periodic maintenance is important to keep the engine in good operating condition.The following is a summary of

○: Check or Clean ◊: Replace ●: Contact your authorized Yanmar marine dealer or distributorSystem Item Periodic Maintenance IntervalDaily Every 50hour

○: Check or Clean ◊: Replace ●: Contact your authorized Yanmar marine dealer or distributorSystem Item Periodic Maintenance IntervalDaily Every 50hour

○: Check or Clean ◊: Replace ●: Contact your authorized Yanmar marine dealer or distributorSystem Item Periodic Maintenance IntervalDaily Every 50hour

Inspection and Maintenance of EPA Emission-Related PartsParts IntervalClean fuel injection nozzle 1500 hoursCheck fuel injection nozzle (adjustment)30

PERIODIC MAINTENANCEPROCEDURESAfter Initial 50 Hours ofOperationPerform the following maintenance after theinitial 50 hours of operation.• Changing th

10. Approximately 10 minutes afterstopping the engine, remove the oildipstick and check the oil level. Add oilif the level is too low.11. Dispose of w

2. Remove the two mounting screws(Figure 3, (1)) and the housing(Figure 3, (2)).3. Drain the fuel from the fuel drain cockon the bottom of the fuel /

Draining Fuel Filter / WaterSeparatorWater and sediment can clog the fuel filterand impair the function of the fuel injectionpump and valve. If heavy

Every 125 Hours of OperationPerform the following maintenance every125 hours of operation or 6 months,whichever comes first.• Changing the Engine Oil

INTRODUCTIONWelcome to the world of Yanmar Marine!Yanmar Marine offers engines, drivesystems and accessories for all types ofboats, from runabouts to

Every 250 Hours of OperationPerform the following maintenance every250 hours or one year of operation,whichever comes first.• Replacing the Fuel Filte

Fresh Water Cooler(4)0004917Figure 11Intercooler(2)0004920Figure 12Intercooler(2)0004921Figure 13Location PartNumberQty. DimensionsD x LFuelCooler1195

Cleaning the Air Cleaner(1)0004911Figure 141. Slide air cleaner (Figure 14, (1)) off airinlet.2. Clean the air cleaner with detergent.3. Allow to air

Checking and Adjusting theAlternator V-Belt Tension(1)(2)0004903Figure 15NOTICE: NEVER get any oil on thebelt(s). Oil on the belt causes slippingand s

Every 1000 Hours of OperationPerform the following maintenance every1000 hours or 4 years of operation,whichever comes first.• Checking the Fuel Injec

7. NOTICE: Replace the seawaterpump impeller every 1000 hourseven if no damage is apparent.When replacement is required, seeyour authorized Yanmar mar

This Page Intentionally Left BlankPERIODIC MAINTENANCE70 6LPA Series Operation Manual© 2007 Yanmar Marine International

TROUBLESHOOTINGIf a problem occurs, stop the engineimmediately. Refer to the SYMPTOMcolumn in the Troubleshooting Chart toidentify the problem.TROUBLE

Periodically operate the engine nearmaximum speed while underway. Thiswill generate higher exhausttemperatures, which will help clean outhard carbon d

TROUBLESHOOTING CHARTSymptom Probable Cause Measure ReferenceIndicators light on theinstrument panel andalarm sounds duringoperationShift to low speed

RECORD OF OWNERSHIPTake a few moments to record the information you need when you contact Yanmar forservice, parts or literature.Engine Model: Engine

Symptom Probable Cause Measure ReferenceIndicators Do Not Go On:• When key is turnedON• When any troubleoccurs (oil pressureetc.)No electrical current

Symptom Probable Cause Measure ReferenceStarting Failures:• Starter turns butengine does not startNo fuel. Add fuel. Bleed fuelsystem.See Filling theF

Symptom Probable Cause Measure ReferenceAbnormal Exhaust Color:• Black smoke Overload Reduce load. -Improper propeller matching. See your authorizedYa

TROUBLESHOOTINGINFORMATIONIf the engine does not operate properly, referto the Troubleshooting Chart on page 73 orsee your authorized Yanmar marine de

This Page Intentionally Left BlankTROUBLESHOOTING78 6LPA Series Operation Manual© 2007 Yanmar Marine International

LONG-TERM STORAGEIf the engine will not be used for an extendedperiod of time, special measures should betaken to protect the cooling system, fuelsyst

DRAINING THE FRESHWATER AND SEAWATERCOOLING SYSTEM(2)(1)0004904Figure 1(3)0004905Figure 2(4)0004906Figure 3(5)0004907Figure 41 – Seawater Drain Cock2

Draining Seawater CoolingSystemNOTICE: If seawater is left inside, it mayfreeze and damage parts of the coolingsystem (fresh water cooler, seawaterpum

This Page Intentionally Left BlankLONG-TERM STORAGE82 6LPA Series Operation Manual© 2007 Yanmar Marine International

SPECIFICATIONSPRINCIPAL ENGINE SPECIFICATIONSSpecification 6LPA-STP2 6LPA-STZP2Type Vertical water-cooled 4–cycle diesel engineNumber of cylinders 6Bo

SAFETYYanmar considers safety of greatimportance and recommends that anyonethat comes into close contact with itsproducts, such as those who install,o

*Density of fuel: 0.840 g/cm3 at 15˚C. Fuel temperature 25°C at the inlet of the fuel injection pump. Ratingcondition: ISO 3046-1, 8665.Note: 1 hp met

Marine Drive Specifications (Optional)Model Hurth Kanzaki MercruiserZF63A1 KMH50A Bravo X-1 Bravo X-2 Bravo X-3Type 8° down Hydraulic Stern DriveAppli

This Page Intentionally Left BlankSPECIFICATIONS86 6LPA Series Operation Manual© 2007 Yanmar Marine International

SYSTEM DIAGRAMSPIPING DIAGRAMSContact your authorized Yanmar dealer forcurrent diagrams.6LPA Series Operation Manual 87© 2007 Yanmar Marine Internatio

6LPA-STP2---0004891Figure 1SYSTEM DIAGRAMS88 6LPA Series Operation Manual© 2007 Yanmar Marine International

6LPA-STZP2PowerPowerPower---0004892Figure 2SYSTEM DIAGRAMS6LPA Series Operation Manual 89© 2007 Yanmar Marine International

WIRING DIAGRAMSB-Type Instrument Panel0004893Figure 3SYSTEM DIAGRAMS90 6LPA Series Operation Manual© 2007 Yanmar Marine International

C/D-Type x B-Type Instrument Panel0004894Figure 4SYSTEM DIAGRAMS6LPA Series Operation Manual 91© 2007 Yanmar Marine International

C/D-Type x C-Type Instrument Panel0004895Figure 5SYSTEM DIAGRAMS92 6LPA Series Operation Manual© 2007 Yanmar Marine International

EPA WARRANTYUSA ONLYYANMAR CO., LTD. LIMITEDEMISSION CONTROLSYSTEM WARRANTY - USAONLY0005438THIS EMISSION WARRANTY APPLIES TOTHE ENGINES CERTIFIED TO