Target Audience:
Boat owners, marine mechanics and technicians servicing small auxiliary diesel engines
Application:
Auxiliary sailboat and small craft propulsion
Displacement:
1.266 liters
Aspiration:
Naturally aspirated
Cooling Options:
Direct freshwater and raw water cooling
Design Priority:
Durability and consistent power output in marine environments
Manual Type:
Full Service Repair Manual
Delivery:
Instant download
Page Count:
N/A - not specified in the supplied description
Maintenance Procedures:
Including oil and filter changes
Diagnostics:
Detailed diagnostic procedures
Rebuilding:
Rebuilding procedures covered
Refurbishing:
Refurbishing procedures covered
Restoration:
Restoration procedures covered
Technical Specifications:
Included
Troubleshooting:
Troubleshooting guides included
Illustrations:
Detailed illustrations and drawings
Wiring Diagrams:
Included
Engine Mechanical:
Cylinder head, block, pistons, rings, bearings and crankshaft
Fuel System:
Fuel delivery, injection pump and injector service
Cooling System:
Freshwater and raw water cooling circuits, pump and thermostat
Lubrication System:
Oil pump, filter and lubrication circuit
Intake and Exhaust:
Naturally aspirated intake and exhaust components
Electrical System:
Starting, charging and wiring diagrams
Marine Gear Interface:
Engine-to-transmission mounting and alignment
Scheduled Maintenance:
Oil and filter changes and routine service tasks
Diagnostics:
Fault diagnosis and troubleshooting procedures
Disassembly:
Component removal and teardown sequences
Rebuild:
Rebuilding and refurbishing procedures
Restoration:
Restoration procedures for older engines
Adjustments:
Valve clearance and injection timing adjustment procedures
Specifications:
Torque values, clearances and wear limits where published
Drawings:
Detailed illustrations and exploded drawings
Wiring Diagrams:
Included for the electrical system
Troubleshooting:
Symptom-based troubleshooting guidance
Parts Identification:
Component identification by illustration and description
Part Numbers:
N/A - not specified in the supplied description
File Format:
PDF (searchable, bookmarked, zoomable)
Compatibility:
Windows, macOS, Linux, iOS, and Android — any device with a PDF reader
Requirements:
A PDF reader application (e.g. Adobe Acrobat Reader, free)
Searchability:
Fully text searchable for fast lookup of any topic
Print Quality:
High-resolution digital pages, printable at full clarity
Binding Type:
N/A — digital download, no physical binding
Paper Type:
N/A — digital download, no physical paper
Engine Type:
Naturally aspirated marine diesel
Configuration:
3-cylinder inline
Displacement:
1.266 liters
Cooling:
Direct freshwater or raw water cooling, depending on installation
Induction:
Naturally aspirated
Injection Pump:
Mechanical diesel injection pump; service procedures covered in the manual
Governor:
Mechanical governor; adjustment procedures covered
Standard Transmission:
Marine reduction gear (transmission supplied to suit the vessel installation)
Optional Transmission:
N/A - not specified in the supplied description
Engine Coupling:
Engine-to-transmission mounting, alignment and damper plate service covered in the manual
Features:
Ahead and astern operation with reduction ratio selected at installation
Ratings and Crash Testing
Crash Test Information:
N/A - not applicable to a marine diesel engine
Engine Protection:
Cooling and lubrication monitoring provisions described in the service procedures
Alarm System:
Coolant temperature and oil pressure alarm circuits covered in the wiring diagrams
Enclosed Rotating Parts:
Belt and pulley guarding as installed by the vessel builder
Corrosion Protection:
Marine-grade materials and paint finish described in the manual
Oil and Filter Change:
First change at initial break-in service, then periodic intervals under engine hours as scheduled in the manual
Fuel Filter:
Replaced at scheduled service intervals
Impeller:
Raw water pump impeller inspected and replaced at scheduled intervals
Exact Hour Intervals:
N/A - confirm against the service schedule in the manual for your installation
Engine Oil:
Marine diesel engine oil of the grade and viscosity specified in the manual
Coolant:
Freshwater-cooled engines require the recommended antifreeze and distilled water mixture
Fuel:
Clean, water-free diesel; water separator filtration recommended
Filters:
Oil filter and fuel filter elements
Impeller:
Raw water pump impeller
Belts:
Alternator and freshwater pump drive belts
Anodes:
Cooling system and heat exchanger anodes where fitted
Specialisation:
Yanmar is a long-established manufacturer of industrial and marine diesel engines
Series:
YM-series small marine diesel engine family
Generation:
Naturally aspirated 3-cylinder small marine diesel generation
Production Location:
N/A - not specified in the supplied description
