Target Audience:
Boat owners, marine technicians, and DIY mechanics
Application:
Propulsion engines for sailboats and small powerboats
Manufacturer:
Westerbeke, known for reliable marine diesel engines
Engine Type:
Vertical, water-cooled, four-stroke diesel
Cooling System:
Freshwater cooling with heat exchanger
Emissions:
Meets applicable EPA and CARB standards for marine engines
Coverage Areas:
Engine overhaul, troubleshooting, maintenance, specifications, and component service
Manual Type:
Technical Manual / Service Manual
Delivery:
Instant download
Page Count:
N/A - not specified in this manual
Engine Mechanical:
Cylinder head, block, pistons, crankshaft, bearings
Fuel System:
Fuel injection pump, injectors, filters, lines
Cooling System:
Raw water pump, heat exchanger, thermostat, hoses
Lubrication System:
Oil pump, oil filter, oil cooler, lines
Electrical System:
Starter, alternator, wiring, sensors, gauges
Exhaust System:
Manifold, riser, muffler, piping
Transmission:
Marine gear, reduction ratios, linkages
Propulsion:
Propeller shaft, couplings, bearings
Diagnostic Procedures:
Troubleshooting charts and symptom-based diagnostics
Disassembly and Assembly:
Step-by-step engine removal and installation
Adjustments:
Valve clearance, injection timing, belt tension
Testing:
Compression, oil pressure, cooling system pressure
Wiring Diagrams:
Electrical schematics and component locations
Specifications:
Torque values, clearances, wear limits, capacities
Illustrations:
Exploded views, cross-sections, and photographs
Tool List:
Special tools and equipment required
Part Numbers:
OEM part numbers for major components
Ordering:
Guidance on sourcing replacement parts
Interchange:
Compatibility notes for common parts
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 Models:
20B (Two-cylinder), 30B (Three-cylinder)
Configuration:
Inline, vertical, water-cooled, four-stroke diesel
Displacement:
N/A - not specified in this manual
Bore and Stroke:
N/A - not specified in this manual
Horsepower:
N/A - not specified in this manual
Rated Speed:
N/A - not specified in this manual
Torque:
N/A - not specified in this manual
Injection System:
Mechanical indirect injection
Wheelbase:
N/A - not applicable for marine engine
Length:
N/A - not specified in this manual
Width:
N/A - not specified in this manual
Height:
N/A - not specified in this manual
Curb Weight (Dry):
N/A - not specified in this manual
Service Intervals:
Every 100 hours or annually
Oil Capacity:
N/A - not specified in this manual
Oil Type:
SAE 30 or 10W-30 diesel engine oil
Coolant:
50/50 antifreeze and water mixture
Fuel Filter:
Replace every 200 hours or annually
Common Wear Items:
Impellers, belts, hoses, filters
Known Issues:
Cooling system corrosion, fuel system contamination
