Subaru Robin Power Products Ex27 Users Manual

EX27 to the manual f03e2f7f-38ef-4299-9b82-8b914ab98aef

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Engines

Engines

Engines

Engines

Engines

Overhead Cam

OHV Slant

OHV V-Twin

Rammer

Micro

ENGINES

full line

With more than 40 years of superior

operation and quality that’s second to none,

Subaru engines have earned a worldwide

reputation for top-notch performance and

unbeatable reliability. When you buy Subaru

engines, you can count on excellent

value every time.

Excellent Engines

One of the largest engine manufacturers in the world, Subaru Robin produces more than

1.2 million engines annually for every type of market. With industry-leading technology and

top-quality components, our engines power everything from rammers, welders and trowels

to generators, pressure washers and fun karts – and everything in between. With a two-year

warranty and an expansive parts and service network, our support after the sale is second to

none. In fact, it’s the most comprehensive, powerful engine package on the market.

A Solid Investment.

• With less recoil pulling force, an electronic ignition system and automatic

decompression, you can rely on easy starting every time.

• High power and torque, extended running time and high compression ratios

ensure premium performance in a broad range of applications.

• Designed with cast-iron cylinder liners, a high-carbon steel crankshaft supported

by steel ball bearings and an electronic low-oil shut-off, Subaru engines are

built to last.

• The strength of the Subaru network remains long after the sale with more than

4,500 Subaru dealers in North America and the support of a two-year limited warranty.

• Subaru engines meet or exceed all current EPA and California emission standards.

Lasting Value.

OVERHEAD CAM

1 Chain-driven overhead cam

2 Optimized-capacity rigid muffler

3 Dual ball bearing crankshaft support

4 Pent roof combustion chamber

5 Case-hardened steel timing chain

6 Lubrication holes for the critical

rod journal

2

5

41

6

3

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.

KEY FEATURES

BENEFITS

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.

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.

More power means superior performance:

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

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.

• 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.

ADVANCED TECHNOLOGY

LONG LIFE AND EASY MAINTENANCE

*for 6 hp and above

Offers exceptional

noise reduction.

Extra-large, Extremely Quiet Muffler

•

Charging System up to 200 watts*

•

Electronic Low Oil Shut-Off System

•

Key, Tapered or Threaded Shafts

•

Manual or Cable Remote Throttle Control

Accommodates a

compact design for

generator applications.

Low-profile Air Cleaner

For quick, convenient

and easy starting.

Electric Start*

Ensures engine

protection even in high

dust environments.

Cyclone Pre-cleaner

FACTORY OPTIONS

•

Solenoid-Actuated Idle Control

•

Manual or Remote Control Choke

•

Multiple Air Cleaner Options

EX13

EX17

EX21

EX27

Competitor

Competitor

Competitor

Competitor

0 1 2 3 4 5 6 7 8 (kW)

Max Power

#4 - Pent roof combustion

chamber enables optimum intake

and exhaust valve placement for

maximum engine performance

and efficiency.

#3 - Dual ball bearing crankshaft

support offers maximum stability

under demanding loads.

#1 - Industry leading chain-driven

overhead cam offers superior

power and performance.

#2 - Optimized-capacity

rigid muffler for noise

reduction 2 decibels below

competitor models.

OVERHEAD VALVE

1 Cast-iron cylinder liner

2 Aluminum alloy block

3 Quiet low-tone muffler

4 Forged steel crankshaft with

dual ball bearing support

5 Unique balancer system

3

4

1

5

When searching for a powerful

engine for a wide variety of uses,

look no further than the EH36 and

EH41 four-cycle engines.

Featuring overhead valve (OHV) slant cylinder technology, the EH36 and EH41 offer high performance, easy starts and maximum

durability. With maximum power outputs of 11.5 and 13.5 horsepower, these engines work in a wide range of applications.

KEY FEATURES

BENEFITS

2

The EH36 and EH41 pack quite a punch. Designed for professional and

medium to heavy use, the engines are built to last. A dual-ball-bearing-

supported crankshaft ensures maximum reliability.

One easy pull is all it takes and the EH36 and EH41 are off and running.

Teaming a QuickStart® starting system and a HotSpark® electronic

ignition system with an automatic decompression system ensures

easy starts to make sure the job gets done when you want.

• Cast-iron cylinder liner provides extended engine life.

• Dual ball-bearing-supported crankshaft for maximum reliability.

• Splash-type lubrication system and large-capacity air cleaner

with dual elements enhance reliability.

• Features automatic decompression for quick starting.

• HotSpark ® electronic ignition features automatic timing

adjustment to allow easier starting.

DURABILITY AND RELIABILITY

EASIER STARTING

SLANT CYLINDER SERIES

Offers exceptional

noise reduction.

Extra-large, Extremely Quiet Muffler

•

Charging System up to 200 watts

•

Electronic Low Oil Shut-Off System

•

Key, Tapered or Threaded Shafts

•

Manual or Cable Remote Throttle Control

Accommodates a

compact design for

generator applications.

Low-profile Air Cleaner

For quick, convenient

and easy starting.

Electric Start

Ensures engine

protection even in high

dust environments.

Cyclone Pre-cleaner

FACTORY OPTIONS

•

Solenoid-Actuated Idle Control

•

Manual or Remote Control Choke

•

Multiple Air Cleaner Options

#3 - Low-noise,

rust-resistant muffler.

#1 & 2 - Aluminum alloy block

with cast-iron cylinder liner for

long engine life.

#4 - Forged steel crankshaft

with dual ball bearing support

for optimum reliability.

#5 - Unique balancer system

rotates at the same speed as

the crankshaft to offset

unbalanced forces and ensure

smooth performance.

OVERHEAD VALVE

1 Cast-iron cylinder liners

2 Forged high-carbon steel crankshaft

3 Oversized ball bearing support

4 HotSpark® electronic ignition system

5 Electronic low-oil pressure system

1

3

4

5

Featuring six models ranging from

18 to 25 horsepower, the V-Twin

cylinder series engines are the workhorses

of the Subaru Robin engine line.

Delivering high power and performance in a small package, these four-cycle gasoline engines are ideal for a variety of industrial

and construction equipment. Despite their high power, like all Subaru engines, they boast maximum durability, easy starts and

low exhaust emissions. Indeed there is performance magic in the V-Twin engine.

KEY FEATURES

BENEFITS

2

V-TWIN CYLINDER SERIES

The V-Twin Series offers models with horizontal or vertical PTO shafts,

allowing the engines to be used for an even greater variety of equipment.

Heavy-duty engine components ensure optimum durability and long

engine life. The V-Twin Series is built to withstand the most punishing

working conditions. A forged-steel crankshaft with high-load-capacity

ball bearings ensure maximum reliability.

• Smooth torque is provided throughout the rpm range.

• Improved breathing at high rpm increases power.

• Unique design provides smooth torque and power.

• A full-pressure lubrication system featuring a trochoid-type

oil pump enhances reliability and longevity.

• The large-capacity air cleaner with dual elements

enhances reliability.

• Heavy-duty ball bearing support on output shaft for

high load capacity.

• Cast-iron cylinder liners promote long engine life.

MAXIMUM VERSATILITY

EXTREME DURABILITY

With spin on oil filter,

provides superior

lubrication and long

engine life.

Full-Pressure Lubrication System

•

Multiple Muffler Kits

•

Key Switch with Electronic

Tachometer/Hour Meter

•

15- or 30-amp Charging Systems

Offers a quick and

accurate read of

power, speed and

service intervals.

Control Box with Electronic Tachometer

Allows close coupling

of hydraulic pumps.

Hydraulic Pump Mount

Ensures engine

protection even in high

dust environments.

Canister Air Cleaner

FACTORY OPTIONS

•

LP/NG Fuel System

•

Manual & Remote Cable

Throttle & Choke Controls

•

Oil Drain Extensions

•

Rotating Flywheel Screen

•

Oil Cooler

•

Flywheel Stub Shaft

•

Electronic Governor

#2 - Forged high-carbon steel

crankshaft provides maximum

reliability under demanding loads.

#1 - Cast-iron cylinder

liners enhance reliability and

extend engine life.

#3 - Large main bearing

support on PTO side of

crankshaft minimizes

shock under heavy loads.

#5 - Optional low oil pressure

system protects the engine

if oil levels drop too low.

RAMMER

Light weight, yet durable

and packed with power.

Designed specifically for rammer applications, these engines feature overhead valve (OHV) upright cylinder technology to provide

continuous rated power for demanding rammer applications. Rammer engines are easy starting and lightweight, yet built for high

power, high stress and high performance.

KEY FEATURES

BENEFITS

Ideally balanced, the engine’s upright cylinder reduces swinging movement

and vibration, resulting in less operator fatigue. The cylinder’s vibratory force

moves in the same direction as the rammer itself increasing momentum.

Built with a vibration-proof breather mechanism, thick sheet metal,

and reinforced casting parts with thick walls and ribs, rammer engines

are durable to withstand demanding environments.

• Electronic ignition with automatic timing adjustment

for easier starting.

• Lightweight design increases mobility.

• Vibration-proof breather mechanism maintains separation

between oil and breather air enabling any position operation

and transportation without concern for contamination.

DESIGNED SPECIFICALLY FOR RAMMERS

REINFORCED POWER

RAMMER ENGINE

#3 - Vertical cylinder design

maintains an excellent center

of gravity to efficiently transmit

power to the ground, ensuring

performance second to none.

#4 - Specific rammer design

ensures exceptional and reliable

performance in a durable,

sustaining package.

#2 - Dual ball bearing crankshaft

support provides reliable

performance even in demanding

rammer applications.

#1 - Aluminum alloy block

with cast-iron cylinder liners

for durability.

1 Cast-iron cylinder liners

2 Dual ball bearing crankshaft support

3 Vertical cylinder design

4 Specific rammer design

Rammers present a special engineering challenge. The engine must withstand both the vibration of the compactive force

and the high dirt and dust environment. Additionally, rammer engines require a high degree of specialized design to integrate

with the rest of the machine for maximum performance. The rammer designs require that the entire machine be balanced

on the center of the foot in both the front to back axis and side to side axis. Since the engine is mounted to the side of the

leg of the rammer, the lesser the width (W) of the engine the less the rammer needs to be angled (A) forward to balance the

machine over the foot. As the rammer angle (A) is increased, the compaction force (F1) that impacts the ground is reduced

and the backward force (F2) increases – propelling the rammer forward and reducing compactive force. To maximize the

compaction force, Subaru rammer engines are designed specifically for rammer applications. All Subaru rammer engines

are balanced close to the mounting face and also are balanced on the side to side axis for best compaction performance and

easy operation.

F1

F2

A

W

• Reinforced casting parts are strong enough to endure

the toughest conditions.

• Heavy-duty casing with cross bracing ensures durability

in demanding rammer applications.

1 Powder metal inserted cam gear

2 High-carbon steel crankshaft

with ball bearings on both ends

3 Connecting rod with needle

bearing inserts

4 Hi-temp fluoride oil seal

5 Automatic decompression system

1

3

4

5

KEY FEATURES

BENEFITS

2

#3 - Connecting rod with needle

bearing inserts offers true

bearing support to provide

dependable performance in the

toughest applications.

#2 - High-carbon steel crankshaft

with ball bearings on both ends

ensures ultimate reliability

in heavy load applications.

#1 - Powder metal inserted cam

gear ensures extra protection

for added durability and extended

performance life.

#4 - Hi-temp fluoride oil seal

ensures maximum protection.

MICRO 4-CYCLE

Try not to let the

name mislead you.

For as small as the Micro engines are in size, they’re more than huge in power and performance. The lightest and most compact

engine series in its class, Subaru Robin’s Micro engines showcase advanced technology and engine design all in one compact,

efficient unit.

Easy-to-carry Micros are ideal for handheld equipment, such as backpack

blowers, mini-tillers, water pumps and cement screeds, among many other

applications. At just 8 pounds, these quiet, compact engines are easy to

maneuver and maintain. The result is less operator effort and fatigue, which

ultimately means higher productivity.

With high torque and horsepower output, these state-of-the-art compact

engines provide a lot of bang for the buck. The Micros feature quick

throttle response and a wide rpm range with low vibration. The unique

lubrication system with a separate oil chamber ensures smooth and

stable running throughout a full range of operating positions.

• Introduced as the lightest and most compact 4-cycle engine

in its class.

• The unique lubrication system, with a separate oil chamber,

guarantees a smooth, stable-running engine throughout a wide

range of operating positions.

• The Micro 4-cycle OHV design combined with an automatic

decompression system provides an easy pull and reliable starting.

• Quick throttle response and wide rpm range meet the

requirements of demanding applications.

• Compared to a 2-cycle engine, the Micro 4-cycle OHV design

emits one-tenth the emissions and uses half as much fuel.

• Heavy-duty crankcase design with hard chromium plate cylinder

and forged steel rocker arm ensures maximum reliability.

ULTRA LIGHT AND WELL BALANCED

POWERFUL AND RESPONSIVE

LUBRICATION SYSTEM

The Subaru Micro engines are designed to run in a wide range of positions.

The patented oil lubrication system is elegant in its engineering simplicity.

The natural pressure changes in the crankcase caused by the piston

movement in the cylinder are harnessed to pump the oil throughout the

engine. Oil is pumped from a reservoir in the base of the engine through

a network of one-way valves for reliable lubrication and long engine life

without the need to keep the engine level.

Oil Separator

Check Ball

Oil Tank

Cam Gear Chamber

Rocker Chamber

Blow–by (Oil Mist) Flow

Oil Flow

EX17 EH36 EH65 EH09 EH025

Specications subject to change without notice.

SPECIFICATIONS

Model Type Piston Displacement (cc) Maximum output (HP/rpm) Maximum torque (ft•lb/rpm) Dry weight (lb)

OVERHEAD CAM

EX13 Air-cooled, 4-cycle, slant single cylinder, OHC, horizontal PTO shaft 126 cc 4.3/4000 6.01/2500 31

EX17 Air-cooled, 4-cycle, slant single cylinder, OHC, horizontal PTO shaft 169 cc 5.7/4000 8.34/2500 33

EX21 Air-cooled, 4-cycle, slant single cylinder, OHC, horizontal PTO shaft 211 cc 7.0/4000 10.26/2500 35

EX27 Air-cooled, 4-cycle, slant single cylinder, OHC, horizontal PTO shaft 265 cc 9.0/4000 13.74/2500 46

OHV

SLANT

EH36 Air-cooled, 4-cycle, slant cylinder, horizontal shaft, overhead valve, gasoline engine 404 cc 11.5/3600 20.3/2500 68

EH41 Air-cooled, 4-cycle, slant cylinder, horizontal shaft, overhead valve, gasoline engine 404 cc 13.5/3600 21.0/2500 68

OHV V-TWIN

EH63 Air-cooled, 4-cycle, V-twin cylinder, horizontal shaft, overhead valve, gasoline engine 653 cc 18.0/3600 31.9/2000 97

EH64 Air-cooled, 4-cycle, V-twin cylinder, horizontal shaft, overhead valve, gasoline engine 653 cc 20.5/3600 32.7/2200 97

EH65 Air-cooled, 4-cycle, V-twin cylinder, horizontal shaft, overhead valve, gasoline engine 653 cc 22.0/3600 33.6/2500 97

EH72 Air-cooled, 4-cycle, V-twin cylinder, horizontal shaft, overhead valve, gasoline engine 720 cc 25.0/3600 39.6/2500 101

EH63V Air-cooled, 4-cycle, V-twin cylinder, vertical shaft, overhead valve, gasoline engine 653 cc 18.0/3600 31.9/2000 93

EH65V Air-cooled, 4-cycle, V-twin cylinder, vertical shaft, overhead valve, gasoline engine 653 cc 22.0/3600 33.6/2500 93

RAMMER

EH09 Air-cooled, 4-cycle, single cylinder, horizontal shaft, overhead valve, gasoline engine 86 cc 2.4/3600 3.5/3200 21

EH12 Air-cooled, 4-cycle, single cylinder, horizontal shaft, overhead valve, gasoline engine 121 cc 4.0/4000 5.5/2600 34

MICRO

EH025 Air-cooled, 4-cycle, OHV engine 24.5 cc 1.1/7000 0.87/5000 6

EH035 Air-cooled, 4-cycle, OHV engine 33.5 cc 1.60/7000 1.30/5000 8

EH035V Air-cooled, 4-cycle, OHV engine 33.5 cc 1.60/7000 1.30/5000 8

Subaru Robin is a division of Fuji Heavy Industries Ltd., headquartered in Tokyo, Japan. Fuji is a global

manufacturing company of diversified premium brand products. Total annual sales exceed $13 billion.

There are four main divisions: Subaru Automotive, Aerospace, Eco Technologies and the

Industrial Products Division. All divisions share a common history of innovation of unique

technologies and products that bring added value to premium products.

Subaru Robin industrial engines and equipment have earned a reputation throughout

the world for high performance and durability in the most demanding applications.

Subaru Robin is the fourth largest engine manufacturer in the world, with

annual production exceeding 1 million engines.

Advanced engineering, high technical expertise, and state-of-the-art

robotic manufacturing are hallmarks of Fuji, which proactively

shares technology between divisions in order to stay on the

cutting edge, lead competition and provide customers

with outstanding products.

In recent years, Fuji has earned a worldwide

recognition for technical advances in its

Subaru automobiles, such as Subaru’s

All Wheel Drive (AWD) system,

horizontally opposed engines

and the turbo-charged

300-horsepower WRX STI

performance car. Fuji

has built its solid

reputation on 60 years

of success. Each division

of Fuji Heavy Industries

produces technically

advanced products.

Robin America, Inc.

FUJI HEAVY INDUSTRIES, LTD.

940 Lively Boulevard

Wood Dale, IL 60191-1204, USA

tel: 630-350-8200 • toll free: 800-277-6246

fax: 630-350-8212

web: www.subarupower.com

e-mail: Sales@robinamerica.com

PUB-ENGFL rev. 2/2007

HISTORY OF INNOVATION

FUTURE OF EXCELLENCE.