Subaru Robin Power Products EX27 Overhead CAM, Factory Options, Advanced Technology, Rod journal

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OVERHEAD CAM

Combining advanced technology

with experienced craftsmanship, Subaru Robin’s EX Series engines are leading the industry.

With four models ranging from 4.5- to 9-horsepower, these engines are superior to competitors in the same class. After all, it’s the first air-cooled engine line to use advanced chain-driven overhead cam (OHC) technology to ensure more power, less noise and easy, one-pull starting every time.

ADVANCED TECHNOLOGY

Subaru Robin’s EX Series engines take technology to the extreme. Using chain-driven overhead cam (OHC) technology, these workhorses provide maximum efficiency, performance and power, along with minimal noise and emissions.

Extremely easy starting with no kick-back:

•An automatic decompression system offers easier starting, reducing the required pulling force by 30 to 40 percent.

•EX engines start instantly even at temperatures as cold as -10 C without any perceptible kick-back.

More power means superior performance:

• Pent roof combustion chamber allows for a high compression ratio of up to 9:1.

 

 

 

 

EX13

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Competitor

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Competitor

 

 

Max Power

 

 

 

 

 

 

 

 

 

EX17

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

EX21

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Competitor

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

EX27

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Competitor

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0

1

2

3

 

4

5

 

6

7

8 (kW)

Less noise:

•33 percent fewer moving valve train parts than OHV designs and reduced mechanical noise ensures noise levels a full 2 dbA below competitive models.

BENEFITS

#1 - Industry leading chain-driven overhead cam offers superior power and performance.

LONG LIFE AND EASY MAINTENANCE

#2 - Optimized-capacity rigid muffler for noise

These engines take a lot of abuse, which is why they were built with longevity in mind. A cooler running design and heavy-duty interior parts ensure maximum uptime. When maintenance is performed, EX Series engines require no special tools and have high parts commonality between models.

•The patent-pending cooling design features a slanted cylinder and 360-degree airflow around both the exhaust and intake valve stem areas.

•Heavy-duty piston rings and a cast-iron cylinder liner resist wear and ensure a long engine life.

•A case-hardened steel timing chain allows for precision timing and maximum durability.

2

KEY FEATURES

1 Chain-driven overhead cam

reduction 2 decibels below competitor models.

 

 

FACTORY OPTIONS

Low-profile Air Cleaner

•

 

Charging System up to 200 watts*

•

Solenoid-Actuated Idle Control

Accommodates a

 

compact design for

•

Electronic Low Oil Shut-Off System

•

Manual or Remote Control Choke

generator applications.

•

Key, Tapered or Threaded Shafts

•

Multiple Air Cleaner Options

 

4

1

2

Optimized-capacity rigid muffler

 

 

 

3

Dual ball bearing crankshaft support

#3 - Dual ball bearing crankshaft support offers maximum stability under demanding loads.

• Manual or Cable Remote Throttle Control

Extra-large, Extremely Quiet Muffler

Electric Start*

 

Cyclone Pre-cleaner

 

Offers exceptional

 

For quick, convenient

 

Ensures engine

 

 

 

 

noise reduction.

 

and easy starting.

 

protection even in high

 

 

 

 

 

dust environments.

 

 

 

 

 

 

6

3

5

4

Pent roof combustion chamber

 

 

 

5

Case-hardened steel timing chain

 

 

 

6

Lubrication holes for the critical

 

rod journal

#4 - Pent roof combustion chamber enables optimum intake and exhaust valve placement for maximum engine performance and efficiency.

*for 6 hp and above

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Contents Engines Solid Investment. Lasting Value Advanced Technology Long Life and Easy MaintenanceOverhead CAM Factory OptionsOverhead Valve Durability and ReliabilityEasier Starting Oversized ball bearing support Maximum VersatilityExtreme Durability Cast-iron cylinder linersDesigned Specifically for Rammers Reinforced PowerRammer Rammer EngineUltra Light and Well Balanced Powerful and ResponsiveMicro 4-CYCLE LubricationsystemCAM SpecificationsFuture of Excellence

EX27 specifications

The Subaru Robin Power Products EX27 is a versatile and robust engine designed for various applications, ranging from industrial equipment to agricultural machines. Renowned for its reliability and performance, the EX27 has become a preferred choice among professionals seeking durable power solutions.

One of the standout features of the EX27 is its 4-stroke, air-cooled, overhead cam design, ensuring efficient fuel consumption and reduced emissions. This engine produces a maximum output of 9.0 horsepower at 3,600 RPM, offering ample power for demanding tasks. With a displacement of 270cc, the EX27 combines performance with compactness, making it easy to integrate into various equipment.

The EX27 incorporates Subaru's innovative technologies, such as the patented floating piston technology, which minimizes vibration and enhances overall engine life. This feature is particularly crucial for users who operate equipment for extended periods, as it contributes to operator comfort and reduces wear on machinery. The engine also includes a dual-element air filter, providing superior protection against dust and debris, thereby ensuring longevity even in harsh environments.

Another key characteristic of the EX27 is its easy-start recoil system. This design simplifies the ignition process, allowing users to quickly fire up the engine, enhancing productivity, especially in commercial applications. The engine is also equipped with a large-capacity fuel tank that allows for longer run times between refueling, ensuring minimal downtime during operation.

Durability is at the core of the EX27's design, featuring a heavy-duty crankshaft and aluminum die-cast construction that withstands the rigors of daily use. Its lightweight nature also helps in reducing the overall weight of the equipment, making it more portable and easier to handle.

In summary, the Subaru Robin Power Products EX27 stands out for its combination of power, efficiency, and durability. With innovative technologies and user-friendly features, this engine is suitable for a wide range of applications, offering reliability that professionals can count on. Whether for construction, landscaping, or agricultural tasks, the EX27 proves to be a worthwhile investment for anyone in need of a dependable power source.
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