New Yanmar 4JH3-DTE 125HP Inboard Diesel Engine
The new 4JH4-TE (turbo), the 4JH4-THE (intercooler-turbo) and the 4JH3-DTE (hi-power intercooler turbo), create a family of three lightweight, user-friendly, clean, thrifty and reliable marine diesel engines that are available in shaftdrive and saildrive configurations.
Specifications – New Yanmar 4JH3-DTE 125HP Inboard Diesel Engine
Rated Output
91.9 kW / 125 mhp
Rated Speed
3800 rpm
Displacement
1.995 L / 122 cu. in
No. of cylinders
4 cylinders
Cylinder Bore x Stroke
84 mm x 90 mm / 3.31 in x 3.54 in
Combustion system
Direct Injection, Bosch Distributor Type VE Pump
Aspiration
Turbocharged & Intercooled
Alternator
12V – 125A
Dry weight without gear
229 kg / 504.8 lbs
Dimensions
1001.3 mm x 581 mm x 661 mm
Controls
Mechanical
Certifications
RCD 1 EPA Tier 2 BSO II EMC SOLAS
NOTE:
1 kW = 1.3596 mhp = 1.34102 bhp
Fuel condition: density at 15°C = 0.842 g/cm³
Technical data is according to (ISO 8665) / (ISO 3046)
Fuel temperature 25°C at the inlet of the fuel injection pump (ISO 3046)
Length includes KM4A2 marine gear
(Dimensions may vary with other gears/elbow)
Standard Engine Package
Exhaust mixing elbow [L-type]
Alternator 12V – 125A
B20 panel
Flexible mounts
Expansion tank for fresh water cooling system
Electric stop solenoid
Belt safety cover
Optional Accessories
High-riser mixing elbow [instead of L-elbow]
C30 panel
Extension wire harness [4m, 6m, 10m]
Dual harness [for 2nd station]
TFX Sidemount control head
Air heater [glow]
Trolling valve [only for KMH4A]
On-board spare parts kit
The Yanmar 4JH3-DTE 125HP engine is a high-performance 4-stroke inboard diesel engine specifically designed for large sailboats, yachts, and small motorboats. This engine combines a lightweight body design, optimal fuel efficiency, and a reliable and easy-to-maintain mechanical system.
Here are the key technical specifications, key features, and standard equipment of this legendary engine:
Main Technical Specifications
Maximum Power Output: 91.9 kW or equivalent to 125 horsepower (HP).
Rated Speed: 3800 RPM.
Number of Cylinders: Inline-four.
Aspiration System: Equipped with a Turbocharger and Intercooler to boost air efficiency.
Displacement: 1.995 Liters (122 cu. in.).
Combustion System: Direct Injection with a Bosch VE-type distributor pump.
Dry Weight: 229 kg without transmission (very light for its class).
Engine Dimensions: Length 1001.3 mm × Width 581 mm × Height 661 mm.
Oil Capacity: Ranges from 6.3 to 7.5 liters
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