Model Variant:
DV10 and DV20 marine diesel engines (including MS/ME gearbox variants)
Production Years Covered:
Classic era, 1960s to 1990s (manual covers all production years of these models)
Engine Type:
Naturally aspirated, four-stroke, single- and two-cylinder marine diesel
Cooling System:
Raw-water cooled (direct seawater)
Target Audience:
Marine engineers, boatyards and DIY owners maintaining Bukh DV-series auxiliaries
Market Segment:
Small marine auxiliary diesel engines for sailboats and workboats
Key Advantage:
Simple, robust, low-revving design with excellent spare-parts availability
Reputation:
Renowned for durability, easy hand-starting and long service life
Design Philosophy:
Heavy-duty castings, low specific output for long life
Starting:
Hand-crank or electric start (depending on installation)
Serviceability:
Designed for in-boat access and simple field maintenance
Systems Covered:
Engine mechanical, fuel, cooling, lubrication, electrical and transmission
Procedures Included:
Maintenance schedules, troubleshooting, disassembly, assembly, specifications
Delivery:
Instant download
Page Count:
N/A - page count varies by edition
Manual Type:
Workshop service repair manual
Engine Mechanical:
Cylinder head, valves, pistons, connecting rods, crankshaft, bearings and crankcase
Fuel System:
Fuel tank, filters, lift pump, injection pump, injectors and fuel lines
Cooling System:
Raw-water pump, impeller, thermostat and cooling passages
Lubrication System:
Oil pump, pressure relief valve, oil filter and galleries
Electrical System:
Charging, starting, wiring harness and instrumentation
Transmission:
MS/ME gearbox, clutch, shaft coupling and controls
Exhaust System:
Exhaust manifold, elbow and wet exhaust arrangements
Maintenance:
Daily, 50-hour, 100-hour, seasonal and lay-up service schedules
Troubleshooting:
Diagnostic tables for starting, fuel, cooling and charging faults
Disassembly:
Step-by-step engine removal and component strip-down
Assembly:
Correct reconditioning sequences and torque tightening
Adjustment:
Valve clearance, injection timing, governor and belt adjustment
Specifications:
Full factory torque, clearance and wear-limit data
Special Tools:
Required service tools and workshop equipment listed
Illustrations:
Exploded views, cross-sections and wiring diagrams
Parts Catalog:
Illustrated part references and component identification
Part Numbers:
OEM part numbers listed where applicable
Wear Limits:
Service limits for bores, journals and valve components
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
DV10:
Single-cylinder, 0.7 L displacement class
DV20:
Two-cylinder, 1.4 L displacement class
Configuration:
Vertical in-line, four-stroke diesel
Combustion:
Direct-injection diesel, naturally aspirated
DV10 Output:
Approximately 10 hp at governed marine speed
DV20 Output:
Approximately 20 hp at governed marine speed
Rated Speed:
Governed around 2000 - 2500 rpm depending on setting
Torque:
High low-speed torque suited to displacement-hull propulsion
Injection Pump:
Bosch-type mechanical injection pump
Injectors:
Single-hole pintle injectors, pressure-set
Fuel Filtration:
Primary water-separator and secondary fine filter
Type:
Bukh MS or ME mechanical marine gearbox
Operation:
Manual single-lever control, cone or multi-disc clutch
Reduction Ratio:
Multiple ratio options matched to propeller and hull
Lubrication:
Oil-filled casing with level plug
Ahead / Astern:
Full forward and reverse engagement
Propeller Coupling:
Flanged output for conventional shaft drive
Service:
Oil change interval specified in manual
Length:
Compact footprint, vary by DV10 or DV20 variant
Width:
Narrow profile for restricted engine boxes
Height:
Low overall height for shallow bilge installations
Wheelbase:
N/A - not applicable to marine engines
Curb Weight:
N/A - dry engine weight varies by model and gearbox
Dry Weight:
Refer to manual specification table for exact figures
Cooling Protection:
Raw-water flow monitoring and overheat alarm circuit
Lubrication Protection:
Oil pressure warning switch
Fuel Shut-off:
Manual stop lever and/or solenoid stop valve
Crash Ratings:
N/A - industrial/marine engine, not crash-tested
Panel Gauges:
Optional tachometer, hour meter, temperature and oil pressure gauges
Alarms:
Buzzer/light for overheat and low oil pressure
Charging:
12 V alternator with integrated regulator
Throttle and Gear:
Single-lever or two-lever mechanical control
Starting:
Key or push-button electric start, plus hand-crank provision
Infotainment:
N/A - no audio system on this engine
Daily:
Check oil level, coolant intake flow and fuel/water separators
50 Hours:
First oil and filter change on new or rebuilt engines
100 Hours:
Oil and filter replacement, impeller and belt inspection
Seasonal:
Fuel filter change, valve clearance check, winterization
Engine Oil:
Refer to manual for grade; typically SAE 15W-40 or 20W-50 diesel oil
Gearbox Oil:
Specified marine gear oil per manual
Fuel:
Diesel, standard automotive/marine gas oil
Coolant:
Raw seawater, no antifreeze mix in raw-water system
Cooling:
Impeller wear and heat-exchanger/manifold scaling on raw-water cooled engines
Fuel:
Injection pump and injector wear, fuel leaks at unions and seals
Electrical:
Corrosion of terminals and starter/alternator brush wear
Wear Items:
Impeller, fuel/oil/air filters, belts, glow plugs and zinc anodes
Manufacturer:
Bukh a/s, Denmark
Founded:
Classic Danish engine maker with roots in marine and industrial diesels
Reputation:
Robust, long-lived engines favoured by sailors for reliability
DV Series:
DV10 and DV20 were core auxiliary engines of the Bukh range
Successors:
Later Bukh models built on DV-series durability
Production:
Manufactured in Denmark for global marine markets
