Product Line:
Marine Diesel Engines
Model Variants Covered:
FOUR-230 and SIX-346
Engine Type:
Four-cylinder and six-cylinder marine diesel, fresh-water cooled
Production Years Covered:
N/A - not specified in the source manual
Documentation Type:
Factory-style service and repair manual for marine diesel engines
Intended Application:
Marine propulsion and auxiliary power in boats and yachts
Target Audience:
Marine technicians, boatyards, and DIY boat owners performing service or rebuilds
Application Segment:
Inboard marine diesel propulsion and generator drive engines
Competitive Advantage:
Covers both the FOUR-230 and SIX-346 in one reference, with factory procedures for overhaul and adjustment
Key Feature 1:
Step-by-step teardown, inspection, and reassembly sequences
Key Feature 2:
Torque values, clearances, and wear limits for major components
Key Feature 3:
Fuel, cooling, lubrication, and electrical system diagnostics
Manual Type:
Downloadable PDF service and repair manual
Delivery Method:
Instant download after purchase
Binding:
Digital - no physical binding
Page Count:
N/A - exact page count varies by edition
Coverage Areas:
Engine mechanical, fuel system, cooling system, lubrication, electrical, and adjustment procedures
Engine Mechanical:
Cylinder head, block, pistons, rings, connecting rods, crankshaft, bearings, camshaft, and valve train
Fuel System:
Injection pump, injectors, fuel filters, fuel lines, and bleeding procedures
Cooling System:
Raw-water pump, heat exchanger, thermostat, hoses, and fresh-water circuit
Lubrication System:
Oil pump, oil filter, oil cooler, pressure relief valve, and oil passages
Electrical System:
Alternator, starter motor, wiring, sensors, and charging circuit
Exhaust System:
Manifold, riser, and exhaust routing considerations
Governor and Speed Control:
Mechanical governor adjustment and throttle linkage
Transmission Interface:
Marine gear coupling, damper plate, and alignment checks
Mounts and Alignment:
Engine mounts, bed rails, and shaft alignment basics
Disassembly:
Ordered teardown sequences for top-end and complete engine overhaul
Inspection:
Measurement and wear-limit checks for critical components
Assembly:
Reassembly with torque sequences and clearances
Adjustment:
Valve lash, injection timing, idle speed, and governor settings
Testing:
Compression testing, oil pressure testing, and cooling system checks
Troubleshooting:
Diagnostic charts for no-start, low power, overheating, and smoke conditions
Technical Depth and Parts
Technical Depth:
Component-level repair, overhaul, and specification data
Parts Information:
Component identification and part arrangement; OEM part numbers not guaranteed
Specifications:
Clearances, torque values, and service limits where published
Illustrations:
Exploded views and component diagrams as included in the source manual
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 Family:
Westerbeke marine diesel, FOUR-230 and SIX-346
Configuration:
FOUR-230: inline four-cylinder; SIX-346: inline six-cylinder
Cooling:
Fresh-water (closed) cooled with raw-water heat exchanger
Combustion Cycle:
Four-stroke diesel
Aspiration:
Naturally aspirated
Displacement:
N/A - exact displacement not specified in the source manual
Bore and Stroke:
N/A - exact dimensions not specified in the source manual
Compression Ratio:
N/A - not specified for this model
Firing Order:
N/A - not specified for this model
Performance and Fuel System
Rated Output:
N/A - exact ratings not specified in the source manual
Rated Speed:
N/A - exact speed not specified in the source manual
Fuel System Type:
Mechanical diesel injection pump with injectors
Governor:
Mechanical governor for speed regulation
Fuel Filtration:
Primary and secondary fuel filter arrangement
Starting System:
Electric starter with charging alternator
Standard Transmission:
Marine reduction gear (marine transmission) coupled to engine flywheel housing
Optional Transmission:
N/A - gear options not specified in the source manual
Coupling:
Damper plate and flexible coupling between engine and marine gear
Control:
Mechanical shift and throttle cable linkage
Cooling:
Marine gear oil cooler where fitted
Fluid:
N/A - gear oil specification varies by marine gear manufacturer
Alignment:
Engine-to-shaft alignment required after installation or mount service
Wheelbase:
N/A - not applicable to marine engines
Overall Length:
N/A - exact length not specified in the source manual
Overall Width:
N/A - exact width not specified in the source manual
Overall Height:
N/A - exact height not specified in the source manual
Installation Envelope:
N/A - varies by marine gear and accessory configuration
Curb Weight:
N/A - not applicable; use dry engine weight
Dry Weight:
N/A - exact weight not specified in the source manual
Weight Note:
Installed weight varies with marine gear and accessories
Crash Test Ratings:
N/A - not applicable to marine engines
Engine Protection:
Low oil pressure and high coolant temperature shutdown switches where fitted
Overheat Protection:
Coolant temperature sender and alarm circuit
Overcrank Protection:
Starting circuit protection as fitted
Active Safety:
Alarms for low oil pressure and high temperature
Passive Safety:
Shielding of rotating components and exhaust insulation where fitted
Ventilation:
Engine room ventilation requirements for combustion air and heat removal
Fire Safety:
N/A - vessel fire suppression is outside engine manual scope
Infotainment:
N/A - not applicable to marine diesel engines
Driver Assistance:
N/A - not applicable to marine diesel engines
Instrumentation:
Engine gauges for oil pressure, coolant temperature, and charging voltage
Charging:
Alternator with voltage regulation
Monitoring:
Alarm panel for critical engine parameters
Service Intervals:
Follow Westerbeke marine service schedule; typical marine diesel intervals apply for oil, filters, impeller, and coolant
Engine Oil:
Marine diesel engine oil meeting the manufacturer's viscosity and service grade recommendation
Coolant:
Fresh-water cooling system with antifreeze/rust inhibitor mixture
Fuel Filters:
Replace primary and secondary fuel filters at scheduled intervals
Raw Water Pump:
Inspect and replace impeller at regular intervals or after any overheat
Known Issues and Wear Items
Common Wear Items:
Raw-water pump impeller, fuel filters, oil filters, belts, hoses, and heat exchanger anodes
Cooling System:
Heat exchanger scaling and raw-water circuit debris are common service concerns
Fuel System:
Injection pump and injector service as performance declines; air leaks cause hard starting
Electrical:
Corrosion on marine connections and grounds; clean and protect terminals
Exhaust:
Inspect riser and manifold for corrosion or blockage
