Model:
3YM30 / 3YM20 / 2YM15 Marine Diesel Engine
Model Variant:
3YM30 (3-cylinder), 3YM20 (3-cylinder), 2YM15 (2-cylinder)
Product Years Covered:
Covers the YM-series marine diesel engine range; specific year span not stated in manual listing
Engine Type:
Marine diesel, naturally aspirated
Target Audience:
Professional marine technicians and DIY boat owners servicing sailboat and small craft auxiliary engines
Application:
Auxiliary propulsion engines for sailboats and small motorboats
Advantage:
Engineered for reliability and performance, with robust power output suitable for various marine applications
Configuration:
3-cylinder (3YM30, 3YM20) and 2-cylinder (2YM15)
Cooling Options:
Direct (raw water) cooling or heat exchanger cooling depending on model
Coverage Areas:
Maintenance, troubleshooting, disassembly, overhaul, reassembly, repair procedures, wiring schematics
Manual Type:
Workshop service and repair manual
Page Count:
N/A - not specified in product listing
Delivery Method:
Instant digital download
Binding:
Digital PDF download
Compatibility:
All versions of Windows and Mac; requires PDF Reader and file extraction software
Extras:
Fully printable with zoom functionality for clarity
Engine Mechanical:
Cylinder block, head, pistons, crankshaft, bearings, valve train
Fuel System:
Injection pump, injectors, fuel lines and filters
Lubrication System:
Oil pump, pressure relief, oil circuits and specifications
Cooling System:
Raw water pump, direct cooling and heat exchanger configurations
Electrical System:
Starting and charging circuits, wiring schematics
Intake and Exhaust:
Air intake, exhaust mixing elbow and components
Maintenance Charts:
Scheduled service intervals and lubrication points
Troubleshooting:
Symptom-based fault diagnosis charts
Overhaul Procedures:
Complete engine disassembly and reassembly instructions
Repair Diagrams:
Detailed exploded views and repair illustrations
Wiring Schematics:
Full electrical wiring diagrams
Inspection:
Wear limits, measuring and machining specifications
Detail Level:
Factory workshop level with torque specs and clearances
Intended User:
Professional technicians and DIY mechanics
Parts Data:
Part numbers and exploded component diagrams for repair reference
Torque Values:
Fastener tightening specifications included
Fluid Specifications:
Oil, coolant and fuel specifications per service charts
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
3YM30:
3-cylinder, up to 27.2 HP at 3200 RPM
3YM20:
3-cylinder, up to 17.7 HP at 3200 RPM
2YM15:
2-cylinder, up to 13.8 HP at 3200 RPM
Rated Speed:
3200 RPM (all models)
Application:
Auxiliary propulsion for sailboats and small craft
Cooling:
Direct (raw water) cooling or heat exchanger, depending on model
Injection:
Mechanical direct/indirect injection diesel system; exact type not specified for all models
Configuration:
3-cylinder inline (3YM30, 3YM20); 2-cylinder inline (2YM15)
Wheelbase:
N/A - not applicable, stationary marine engine
Length:
N/A - not specified in product listing
Curb Weight:
N/A - dry engine weights not specified in product listing
Scheduled Service:
Detailed maintenance charts with service intervals included in the manual
Daily Checks:
Oil level, coolant and raw water flow checks per operator procedures
Engine Oil:
Lubricating oil grade and capacity per maintenance chart
Coolant:
Freshwater/antifreeze mix for heat exchanger models; raw water for direct-cooled models
Fuel:
Diesel with primary and secondary filtration
Common Wear Items:
Impellers, fuel filters, oil filters, anodes and belt drives
Troubleshooting:
Starting difficulty, overheating and loss of power diagnosis covered
