Yanmar ZT350 series Specifications

STERN-DRIVEZT350seriesOPERATION MANUALP/N: 0AZTD-G00101

WARNINGSever HazardNEVER service the stern-drive while under tow or if theengine is running at idlespeed. The propeller mayrotate under thesecircumst

WARNINGExhaust HazardNEVER block windows,vents, or other means ofventilation if the engine isoperating in an enclosed area.All internal combustioneng

CAUTIONSlipping and Tripping HazardEnsure that adequate floorspace is set aside forservicing the stern-drive. Thefloor space must be flat andfree of

NOTICENEVER use the stern-drive lifting eye to liftthe engine and stern-drive as an assembly.Use the engine lifting eyes to lift the engineand stern-

This Page Intentionally Left BlankSAFETY10ZT350 Operation Manual© 2008 Yanmar Marine International

PRODUCT OVERVIEWOVERVIEWOwner / OperatorResponsibilitiesThe operator must, and assumes allresponsibility to:• Read and understand the operationmanual

COMPONENT IDENTIFICATION0006029(3)(2)(6)(5)(4)(7)(1)Figure 11 – Steering System Location2 – Transom Assembly3 – Drive Unit4 – Antiventilation Plate5 –

Location of Serial NumbersThe serial numbers are the manufacturer'skeys to numerous engineering details whichapply to your Yanmar stern-drive. Wh

CORROSION PROTECTIONGalvanic CorrosionGalvanic corrosion results whenever two ormore dissimilar metals (like those found onthe stern-drive) are submer

Observe the following precautions whenapplying antifouling or marine paint to thetransom of the boat hull:• ALWAYS follow the paint/coatingmanufacture

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

Gear Housing Anodic PlatesThe gear housing anodic plates are installedon the underside of the antiventilation plate.0006016(1)Figure 41 – Gear Housing

FEATURES AND CONTROLSRemote ControlsThe Yanmar ZT350 can be controlledmechanically with push-pull cables orelectronically. Please refer to the YanmarE

Stern-Drive Trim AngleTrim angle is the angular relationshipbetween the stern-drive and the transom ofthe vessel. Vessel trim while underwaygreatly af

Electrical SystemThe power trim pump's electrical system isprotected by either a 1A in-line fuse(Figure 11, (1)) or an auto-reset circuitbreaker

Yanmar Cathodic Protection SystemThe Yanmar Cathodic Protection System(Y-CaPS) has a 20A in-line fuse(Figure 12, (2)) in the wire which connectsto the

STERN-DRIVE OPERATIONThis section of the Operation Manualdescribes the procedures for properoperation of the stern-drive.Before you operate the ZT350,

WARNINGThe safety messages that follow haveWARNING level hazards. These safetymessages describe a hazardoussituation which, if not avoided, couldresu

PROPELLER SELECTIONThe propeller converts the engine’s powerinto the thrust needed to propel the vessel.Careful selection of your propeller is veryimp

INSTALLING THE PROPELLERS0006015(8)(7)(1)(2)(3)(4)(5)(6)Figure 11 – Rear Propeller Nut2 – Rear Propeller3 – Rear Propeller Thrust Hub4 – Front Propell

1. Apply a liberal coat of lubricant to thepropeller shaft. Recommendedlubricants are shown in the table below.Description Where UsedUrea Grease Water

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

REMOVING THEPROPELLERWARNING! The Remote Control must bein NEUTRAL and the starter keyremoved from the switch beforeremoving and / or installing thepr

1. Check the stern-drive oil level(Figure 2). Keep the oil level at or nearthe OPERATING RANGE (full) line onthe oil reservoir.2. The oil level is low

Check the Power Trim PumpFluidNOTICE: ALWAYS check the oil level withstern-drive in the full DOWN / TRIM-INposition.1. Place the stern-drive in full D

3. Add oil to bring the oil level to within theMIN and MAX lines on the reservoir(Figure 6, (2)).0006014(2)(3)(1)Figure 61 – Fill Cap Assembly2 – MIN

This Page Intentionally Left BlankSTERN-DRIVE OPERATION30ZT350 Operation Manual© 2008 Yanmar Marine International

MAINTENANCEThis section of the Operation Manualdescribes the procedures for proper careand maintenance of the stern-drive.Before you operate the ZT350

WARNINGThe safety messages that follow haveWARNING level hazards. These safetymessages describe a hazardoussituation which, if not avoided, couldresu

NOTICEThe safety messages that follow haveNOTICE level hazards.Only use replacement parts specified. Otherreplacement parts may affect warrantycovera

The Importance of Daily ChecksThe Periodic Maintenance Scheduleassumes that daily checks are performed ona regular basis. Make a habit of performingda

TORQUE CHARTSStandard Torque ValuesNominal Designation of ScrewThreadStandard Tightening TorqueM53.5 ± 0.5 N·m2.6 ± 0.4 lb-ftM66.0 ± 1.0 N·m4.4 ± 0.6

Stern-Drive Operation...21Propeller Selection...

PERIODIC MAINTENANCE TABLE◯: Check or Clean ◊: Replace ●: Contact your authorized Yanmar Marine dealer or distributor DailySee Daily Checks on page 26

◯: Check or Clean ◊: Replace ●: Contact your authorized Yanmar Marine dealer or distributor DailySee Daily Checks on page 26WeeklyEvery 50HoursEvery 1

GENERAL INSPECTIONInspect the stern-drive at regular intervals tohelp maintain top operating performanceand correct potential problems before theyoccu

PERIODIC MAINTENANCEPROCEDURESWeeklyPerform the following procedures on aweekly basis.• Checking the Water Inlets• Checking the Seawater Inlet Hole• I

After Initial 50 Hours ofOperationPerform the following procedures after thefirst 50 hours of operation.• Lubricating the Engine Coupler• Changing the

Every 50 Hours of OperationPerform the following maintenance every 50hours of operation.• Lubricate the Engine CouplerLubricate the Engine CouplerLubr

Retorqueing the Gimbal Ring toSteering Shaft ConnectionTorque the gimbal ring locknuts for thesteering shaft connection.0006035(1)(2)Figure 31 – Gimba

Lubricating the Drive Unit and Universal-Joint Shaft Spines and O-RingsWhen you remove the stern-drive unit from the transom assembly, your should fir

Torqueing the Rear Engine Mount BoltsNote: Refer to the Engine InstallationManual and / or Operation Manual for frontengine mount information.Torque t

3. Lubricate the steering system clevis pin.0005991(1)Figure 91 – Steering System Clevis PinDescription Where UsedUrea Grease WaterResistant Type,NLGI

INTRODUCTIONWelcome to the world of Yanmar Marine!Yanmar Marine offers engines, stern-drivesystems and accessories for all types ofvessels, from runab

Every 250 Hours of OperationPerform the following maintenance every250 hours of operation.• Touching-Up the Stern-Drive Paint andSpray with Corrosion

NOTICE: ALWAYS be environmentallyresponsible. Follow the guidelines of theEPA or other governmental agencies for theproper disposal of hazardous mater

8. Remove the case plate cover, filtercover, magnet and filter. Clean orreplace the filter and magnet.(1)(2)(3)(4)(5)(6)0006441Figure 151 – Oil Level

17. Check the stern-drive oil level within oneweek of the first use as follows:a. Remove the oil vent plug andgasket (Figure 17, (1)).0006031(2)(1)Fig

Checking the Circuit for Loose orDamaged ConnectionsSee Checking the Circuit for Loose or Damaged Connections on page 42.Testing the Y-CaPS Unit Outpu

TROUBLESHOOTINGNo. Problem Possible Cause Action Reference Page1 Remote ControlOperates Hard, Binds,Has Excessive FreePlay or Makes Unusu-al SoundsIns

No. Problem Possible Cause Action Reference Page3 Power Trim Does NotOperate (ElectricMotor Does Not Oper-ate)Blown fuse. Replace the fuse. 19Circuit

LONG-TERM STORAGECOLD WEATHER(FREEZINGTEMPERATURE),SEASONAL AND EXTENDEDSTORAGENOTICE: Yanmar strongly recommendsthat this service be performed by ana

4. CAUTION! The stern-drive should bestored in the FULL DOWN / TRIM-INposition. The universal joint bellowsmay develop a set if the unit isstored in t

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

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

General InformationThere is no substitute for common senseand careful practices. Improper practices orcarelessness can cause burns, cuts,mutilation, a

During Operation andMaintenance DANGERThe safety messages that follow haveDANGER level hazards. These safetymessages describe a hazardoussituation whi