REHLKO DIESEL
Diesel engines
REHLKO DIESEL
Diesel engines
The heritage and evolution of compact diesel technology
The heritage and evolution of compact diesel technology
REHLKO DIESEL (LOMBARDINI) is a brand that has grown into a leader
in diesel-engine technology since its founding in Reggio Emilia, Italy,
in 1933.
REHLKO DIESEL (LOMBARDINI) is a brand that has grown into a leader
in diesel-engine technology since its founding in Reggio Emilia, Italy,
in 1933.
REHLKO DIESEL (LOMBARDINI) is a brand that has grown into a leader in diesel-engine technology since its founding in Reggio Emilia, Italy, in 1933.
On a foundation of more than 80 years of accumulated engineering, it has earned recognition for stability and efficiency in agriculture, construction, generators, industrial equipment, and special-purpose equipment.
In 2007 it joined the KOHLER Group, expanding its global network and technical infrastructure, and it now continues to advance its industrial diesel-engine
lineup under the REHLKO brand.
On a foundation of more than 80 years of accumulated engineering, it has earned recognition for stability and efficiency in agriculture, construction, generators, industrial equipment, and special-purpose equipment.
In 2007 it joined the KOHLER Group, expanding its global network and technical infrastructure, and it now continues to advance its industrial diesel-engine lineup under the REHLKO brand.
On a foundation of more than 80 years of accumulated engineering, it has earned recognition for stability and efficiency in agriculture, construction, generators, industrial equipment, and special-purpose equipment.
In 2007 it joined the KOHLER Group, expanding its global network and technical infrastructure, and it now continues to advance its industrial
diesel-engine lineup under the REHLKO brand.

As an official partner, U-Young Industries operates a supply, parts, technical,
and service system aligned with manufacturer standards.
We do not supply engines; we connect operational stability.
As an official partner, U-Young Industries operates a supply, parts, technical, and service system aligned with manufacturer standards.
We do not supply engines;
we connect operational stability.
SERIES OVERVIEW
REHLKO DIESEL
Key lineup
U-Young Industries operates official technical documentation
and a parts system for the following lineup.
Each series has a clear position according to output scale,
installation environment, and operating conditions.
Air-Cooled Diesel Line
Centered on small single-cylinder units
High durability based on a simple structure
Excellent maintenance accessibility
Applied to agricultural and small construction equipment
Water-Cooled Diesel Line
Multi-cylinder structure
Stable continuous-operation characteristics
Mid-range output
Applied to generators and industrial equipment
EU Stage V / USA Tier 4 Final-Compliant Models
Compliance with global emissions regulations
Electronically controlled efficiency improvement
Some models meet regulations without an after-treatment system
A platform for the latest

Air-Cooled Diesel Line

Water-Cooled Diesel Line

EU Stage V / USA Tier 4 Final-Compliant Models
SERIES OVERVIEW
REHLKO (LOMBARDINI)
주요 라인업
REHLKO (LOMBARDINI)
Key lineup
우영산업은 다음 라인업에 대한
공식 기술 자료 및 부품 체계를 운영합니다.
각 시리즈는 출력 규모, 설치 환경, 운용 조건에 따라
명확한 포지션을 갖습니다.
U-Young Industries operates official technical documentation
and a parts system for the following lineup.
Each series has a clear position
according to output scale,
installation environment,
and operating conditions.
U-Young Industries operates official technical documentation
and a parts system for the following lineup.
Each series has a clear position according to output scale,
installation environment, and operating conditions.

Air-Cooled Diesel Line

Water-Cooled Diesel Line

EU Stage V / USA Tier 4 Final-Compliant Models
Air-Cooled Diesel Line
Centered on small single-cylinder units
High durability based on a simple structure
Excellent maintenance accessibility
Applied to agricultural and small construction equipment
Water-Cooled Diesel Line
Multi-cylinder structure
Stable continuous-operation characteristics
Mid-range output
Applied to generators and industrial equipment
EU Stage V / USA Tier 4 Final-Compliant Models
Compliance with global emissions regulations
Electronically controlled efficiency improvement
Some models meet regulations without an after-treatment system
A platform for the latest

Air-Cooled Diesel Engine Line
Air-Cooled Diesel Engine Line
Air-Cooled Diesel Engine Line
KD625-2
KD625-2
Output Position
Description Description Description Description Description Description Description
(최대 184자)
18.8KW(25.5hp)
18.8KW(25.5hp)
Displacement
Description Description Description Description Description Description Description
(최대 184자)
1248cc
1248cc
Cooling method
Description Description Description Description Description Description Description
(최대 184자)
공냉식(Air-Cooled)
공냉식(Air-Cooled)

Air-Cooled Diesel Engine Line
Air-Cooled Diesel Engine Line
Air-Cooled Diesel Engine Line
KD425-2
KD425-2
Output Position
Description Description Description Description Description Description Description
(최대 184자)
13kW(17.4hp)
13kW(17.4hp)
Displacement
Description Description Description Description Description Description Description
(최대 184자)
851cc
851cc
Cooling method
Description Description Description Description Description Description Description
(최대 184자)
공냉식(Air-Cooled)
공냉식(Air-Cooled)

Air-Cooled Diesel Engine Line
Air-Cooled Diesel Engine Line
Air-Cooled Diesel Engine Line
KD15-440
KD15-440
Output Position
Description Description Description Description Description Description Description
(최대 184자)
7.4kW(10.1hp)
7.4kW(10.1hp)
Displacement
Description Description Description Description Description Description Description
(최대 184자)
441cc
441cc
Cooling method
Description Description Description Description Description Description Description
(최대 184자)
공냉식(Air-Cooled)
공냉식(Air-Cooled)

Air-Cooled Diesel Engine Line
Air-Cooled Diesel Engine Line
Air-Cooled Diesel Engine Line
KD15-350
KD15-350
Output Position
Description Description Description Description Description Description Description
(최대 184자)
5.1kW(7hp)
5.1kW(7hp)
Displacement
Description Description Description Description Description Description Description
(최대 184자)
349cc
349cc
Cooling method
Description Description Description Description Description Description Description
(최대 184자)
공냉식 (Air-Cooled)
공냉식 (Air-Cooled)



ENGINE
WHY REHLKO DIESEL
WHY REHLKO DIESEL
The authenticity and practicality
of European diesel technology
The authenticity and practicality
of European diesel technology
REHLKO diesel engines are
an industrial platform optimized
for the small-to-mid output range.
REHLKO diesel engines are
an industrial platform optimized
for the small-to-mid output range.
Compact design
High-efficiency combustion technology
A durability-centered structure
Broad industrial-application experience
Global emissions-regulation compliance
It is widely applied across agricultural equipment, small construction equipment, generators, and special-equipment platforms. This brand's strength lies in "structural stability proven on the actual site."
It is widely applied across agricultural equipment, small construction equipment, generators, and special-equipment platforms. This brand's strength lies in "structural stability proven on the actual site."
REHLKO Technology Advantages
Diesel technology accumulated
since 1933
Expertise in small and
mid-range diesel
Compact Industrial
Design
EU Stage V / USA Tier 4
Final-compliant models
Some models meet regulations without
an after-treatment system
Diesel technology accumulated since 1933
Expertise in small and
mid-range diesel
Compact Industrial Design
EU Stage V / USA Tier 4 Final-compliant models
ome models meet regulations without an after-treatment system
Total Cost of Ownership Perspective
Daily operating hours
Daily operating hours
Load-repetition structure
Load-repetition structure
Installation
space
Installation
space
Emissions-regulation requirements
Emissions-regulation requirements
Maintenance accessibility
Maintenance accessibility
Engine selection should be judged by operating efficiency, not price.
Engine selection should be judged
by operating efficiency, not price.
Get Technical Consultation
REHLKO & U-YOUNG
An official partner framework that maintains manufacturer standards
As the official partner of REHLKO DIESEL, U-Young Industries maintains the following standards.
Response based on official technical documentation
Response based on official technical documentation
Response based on official technical documentation
Maintaining the
genuine-parts system
Maintaining the
genuine-parts system
Maintaining the
genuine-parts system
Adherence to the manufacturer's standard service protocol
Adherence to the manufacturer's standard service protocol
Adherence to the manufacturer's standard service protocol
Specification matching centered on long-term operation
Specification matching centered on long-term operation
Specification matching centered on long-term operation
It is an official supply structure that maintains brand-technical consistency.
ENGINE FINDER
Small and mid-range diesel, condition-based search
REHLKO engines are selected according to installation space and output requirements.
Output range
(HP / kW)
Output range
(HP / kW)
출력 범위
(HP / kW)
Cylinder configuration
Cylinder configuration
Cooling method (air- or water-cooled)
Cooling method (air- or water-cooled)
냉각 방식
(공냉 / 수냉)
Emissions-regulation stage
Emissions-regulation stage
Equipment
type
Equipment
type
Filter-based search lets you quickly find a suitable model.
View by Series
Download Datasheet

PERFORMANCE & COMPLIANCE
PERFORMANCE & COMPLIANCE
Emissions-regulation response and technical evolution
Emissions-regulation response and technical evolution
REHLKO holds engine technology that complies with EU Stage V / USA Tier 4 Final regulations. Some models are designed to meet emissions standards even without an after-treatment device. This offers major advantages in simplifying installation, reducing maintenance costs, and securing space efficiency.
U-Young Industries provides technical support aligned with these standards.
REHLKO holds engine technology that complies with EU Stage V / USA Tier 4 Final regulations. Some models are designed to meet emissions standards even without an after-treatment device. This offers major advantages in simplifying installation, reducing maintenance costs, and securing space efficiency.
U-Young Industries provides technical support aligned with these standards.
REHLKO holds engine technology that complies with EU Stage V / USA Tier 4 Final regulations. Some models are designed to meet emissions standards even without an after-treatment device. This offers major advantages in simplifying installation, reducing maintenance costs, and securing space efficiency.
U-Young Industries provides technical support aligned with these standards.
GENUINE PARTS & LIFECYCLE SUPPORT
Operational stability based on genuine parts
An engine's lifespan is determined by parts management.
U-Young Industries maintains REHLKO's genuine-parts system and supports the engine's entire lifecycle.
An engine's lifespan is determined by parts management. U-Young Industries maintains REHLKO's genuine-parts system and supports the engine's entire lifecycle.
Genuine-parts management
Genuine-parts management
Preventive
inspection
Preventive
inspection
Repair and
overhaul
Repair and
overhaul
Long-term operation consulting
Long-term operation consulting
Operation begins after adoption.

MODEL COMPARISON
Compare Models Before You Decide
Compare Models
Before You Decide
Compare output, cylinder configuration, cooling method, emissions regulations,
and operating conditions to select the right model.
출력, 실린더 구성, 냉각 방식, 배출 규제, 운용 조건을
비교하여 적합 모델을 선택하십시오.
Compare Models
REHLKO Key Series Comparison
Category
Category
KD Series (air-cooled)
KD Series (air-cooled)
KD Series (air-cooled)
FOCS Series B (water-cooled)
FOCS Series B (water-cooled)
FOCS Series B (water-cooled)
KSD Series (water-cooled)
KSD Series (water-cooled)
KSD Series (water-cooled)
KDI Series (water-cooled)
KDI Series (water-cooled)
KDI Series (water-cooled)
Engine Type
Diesel
Diesel
Diesel
Diesel
Cylinder Configuration
single- or multi-cylinder
multi-cylinder
multi-cylinder
multi-cylinder
Cooling Method
air-cooled
water-cooled
water-cooled
water-cooled
Output Range
small output
mid-range output
mid-range output
mid-range output
Emissions Regulation
Stage IIIA
Stage IIIA
Stage V / Tier 4 Final
Stage V / Tier 4 Final
Operating Characteristics
simple and durable
continuous operation
latest-regulation compliance
latest-regulation compliance
Maintenance Accessibility
very high maintenance accessibility
excellent maintenance accessibility
electronic control included
electronic control included
Genuine-Parts System
O
O
O
O
U-YOUNG Industries
Technical Support
official U-Young technical support
official U-Young technical support
official U-Young technical support
official U-Young technical support
Sroll
APPLICATION APPROACH
By operating conditions, not industry category
REHLKO engines should be selected based on installation space, load conditions, and regulatory environment.
U-Young Industries proposes suitable models based on an analysis of operating conditions.
Engine selection is a matter of suitability, not output.
REHLKO engines should be selected based on installation space, load conditions,
and regulatory environment.
U-Young Industries proposes suitable models based on an analysis of operating conditions.
Engine selection is a matter of suitability, not output.
Built on Trust.
Driven by Responsibility.
REHLKO DIESEL is a brand that has accumulated
more than 80 years of diesel technology.
REHLKO DIESEL is a brand that
has accumulated
more than 80 years of diesel technology.
U-Young Industries delivers that technology to the market exactly
as the manufacturer's standard requires. Stable power is completed on precise standards.




Global Brand Alignment
U-Young Industries is an official partner that maintains
REHLKO's technical standards and market-operation system identically.
Protecting Brand Integrity
Maintaining the Genuine Parts system
Maintaining Technical Compliance
Securing long-term market stability

Global Brand Alignment
U-Young Industries is an official
partner that maintains
REHLKO's technical standards and market-operation system identically.
Protecting Brand Integrity
Maintaining the Genuine Parts system
Maintaining Technical Compliance
Securing long-term market stability

Headquarters:
Room 305, Bldg. 1, 775 Gyeongin-ro, Yeongdeungpo-gu, Seoul
TEL : 02-549-0611, 3439-1611-6
FAX : 02-548-6683
Industrial Equipment
Service
© 2026 U-Young, All rights reserved.

Headquarters:
Room 305, Bldg. 1, 775 Gyeongin-ro, Yeongdeungpo-gu, Seoul
TEL : 02-549-0611, 3439-1611-6
FAX : 02-548-6683
© 2026 U-Young, All rights reserved.

Headquarters:
Room 305, Bldg. 1, 775 Gyeongin-ro, Yeongdeungpo-gu, Seoul
TEL : 02-549-0611, 3439-1611-6
FAX : 02-548-6683
Industrial Equipment
Service
© 2026 U-Young, All rights reserved.


