Model Variants:
STE, STZE, STP, STZP, DTE, DTZE, DTP, DTZP, HTE, HTZE, HTP, HTZP
Production Years:
N/A - not specified in manual
Configuration:
Inline 4-Cylinder
Cooling System:
Marine (indirect cooling)
Target Audience:
Marine technicians, boat owners, and DIY mechanics
Application:
Marine propulsion and auxiliary power
Design:
Compact, lightweight, high power-to-weight ratio
Durability:
Built for continuous marine duty
Serviceability:
Easy access to maintenance points
Manual Type:
Workshop Repair Manual & Operation Manual
Delivery:
Instant download
Page Count:
N/A - not specified
Coverage:
Complete engine, fuel, cooling, electrical, and transmission systems
Procedures:
Step-by-step repair, maintenance, and troubleshooting
Engine Mechanical:
Cylinder head, block, pistons, crankshaft, bearings
Fuel System:
Injection pump, injectors, fuel lines, filters
Cooling System:
Raw water pump, heat exchanger, thermostat, hoses
Lubrication System:
Oil pump, oil cooler, filters, lines
Electrical System:
Alternator, starter, wiring, sensors, gauges
Turbocharger:
Inspection, overhaul, boost control
Transmission:
Marine gearbox, drive configurations
Diagnostics:
Troubleshooting charts and fault codes
Disassembly:
Component removal and teardown
Inspection:
Clearances, wear limits, and tolerances
Reassembly:
Torque specs and assembly sequences
Adjustments:
Valve lash, injection timing, belt tension
Testing:
Compression, oil pressure, cooling system
Specifications:
Detailed factory specs for all variants
Diagrams:
Exploded views, wiring schematics, flow charts
Tools:
Special tools and equipment listed
Part Numbers:
OEM part numbers for service items
Interchange:
Compatible parts across 4LHA variants
Ordering:
Guidance on sourcing replacement 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 Model:
4LHA series
Configuration:
Inline 4-cylinder, turbocharged
Displacement:
2.7 L (2700 cc)
Fuel System:
Direct injection
Cooling:
Indirect cooling (heat exchanger)
Power Output:
Varies by variant (e.g., STE, DTE, HTE); typically 100-200 HP
Torque:
N/A - not specified in manual
Rated Speed:
N/A - not specified in manual
Injection Type:
Direct injection (DI)
Injector:
Multi-hole type
Type:
Yanmar marine gearbox (e.g., ZT350 or similar)
Gear Options:
Forward, Neutral, Reverse
Drive Configurations:
Sterndrive (ST/STZ) or Inboard (P/PZ)
Control:
Mechanical cable actuation
Cooling:
Oil cooler integrated
Ratio:
Varies by application; refer to manual for specific ratios
Wheelbase:
N/A - not applicable to marine engine
Length:
N/A - not specified in manual
Width:
N/A - not specified in manual
Height:
N/A - not specified in manual
Dry Weight:
Approx. 250-300 kg (varies by variant and accessories)
Curb Weight:
N/A - not applicable to marine engine
Overheat Protection:
Coolant temperature sensor and alarm
Low Oil Pressure:
Pressure switch and alarm
Overspeed:
Governor limits maximum RPM
Shielding:
Hot surfaces and rotating parts guarded
Emergency Stop:
Manual shutdown via fuel cut-off
Audio System:
N/A - not applicable to marine engine
Display:
Optional multi-function gauge for engine data
Diagnostics:
Manual fault finding via gauges and alarms
Monitoring:
Basic engine parameters: RPM, temp, oil pressure
Oil Change:
Every 250 hours or annually
Filter Replacement:
Oil and fuel filters at every oil change
Impeller:
Inspect annually; replace as needed or every 2 years
Engine Oil:
Refer to manual for viscosity and API grade; capacity approx. 8-10 L
Coolant:
50/50 ethylene glycol mix or as specified
Common Wear Items:
Impeller, belts, hoses, filters
Typical Concerns:
Corrosion in raw water circuit, injector fouling
