Page 1
ENGINES
full line
Overhead Cam
OHV Slant
OHV V-Twin
Rammer
Micro
Engines
Engines
Engines
Engines
Engines
Page 2
A Solid Investment.
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
Lasting Value.
Excellent Engines
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.
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.
• 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.
Page 3
OVERHEAD CAM
BENEFITS
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
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.
EX17
Competitor
EX21
Competitor
Max Power
EX27
Competitor
LONG LIFE AND EASY MAINTENANCE
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.
FACTORY OPTIONS
Charging System up to 200 watts*
•
Electronic Low Oil Shut-Off System
•
Key, Tapered or Threaded Shafts
•
Manual or Cable Remote Throttle Control
•
Solenoid-Actuated Idle Control
•
Manual or Remote Control Choke
•
Multiple Air Cleaner Options
•
• 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.
Low-profile Air Cleaner
Accommodates a
compact design for
generator applications.
#1 - Industry leading chain-driven
overhead cam offers superior
power and performance.
#2 - Optimized-capacity
rigid muffler for noise
KEY FEATURES
1 Chain-driven overhead cam
2
2 Optimized-capacity rigid muffler
4
6
3
1
5
3 Dual ball bearing crankshaft support
4 Pent roof combustion chamber
reduction 2 decibels below
competitor models.
#3 - Dual ball bearing crankshaft
support offers maximum stability
under demanding loads.
Extra-large, Extremely Quiet Muffler
Offers exceptional
noise reduction.
Electric Start*
For quick, convenient
and easy starting.
Cyclone Pre-cleaner
Ensures engine
protection even in high
dust environments.
*for 6 hp and above
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.
Page 4
OVERHEAD VALVE
BENEFITS
SLANT CYLINDER SERIES
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.
DURABILITY AND RELIABILITY
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-bearingsupported crankshaft ensures maximum reliability.
EASIER STARTING
One easy pull is all it takes and the EH36 and EH41 are off and running.
Teaming a QuickStart
ignition system with an automatic decompression system ensures
easy starts to make sure the job gets done when you want.
®
starting system and a HotSpark® electronic
FACTORY OPTIONS
Charging System up to 200 watts
•
Electronic Low Oil Shut-Off System
•
Key, Tapered or Threaded Shafts
•
Manual or Cable Remote Throttle Control
•
Extra-large, Extremely Quiet Muffler
Offers exceptional
noise reduction.
Solenoid-Actuated Idle Control
•
Manual or Remote Control Choke
•
Multiple Air Cleaner Options
•
Electric Start
• 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
adjustment to allow easier starting.
For quick, convenient
and easy starting.
®
electronic ignition features automatic timing
Low-profile Air Cleaner
Accommodates a
compact design for
generator applications.
Cyclone Pre-cleaner
Ensures engine
protection even in high
dust environments.
#1 & 2 - Aluminum alloy block
with cast-iron cylinder liner for
long engine life.
#3 - Low-noise,
rust-resistant muffler.
KEY FEATURES
3
1
2
4
5
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
#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.
Page 5
OVERHEAD VALVE
BENEFITS
V-TWIN CYLINDER SERIES
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.
MAXIMUM VERSATILITY
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.
EXTREME DURABILITY
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.
FACTORY OPTIONS
Multiple Muffler Kits
•
Key Switch with Electronic
•
Tachometer/Hour Meter
15- or 30-amp Charging Systems
•
Full-Pressure Lubrication System
LP/NG Fuel System
•
Manual & Remote Cable
•
Throttle & Choke Controls
Oil Drain Extensions
•
With spin on oil filter,
provides superior
lubrication and long
engine life.
Rotating Flywheel Screen
•
Oil Cooler
•
Flywheel Stub Shaft
•
Electronic Governor
•
Hydraulic Pump Mount
• 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.
Allows close coupling
of hydraulic pumps.
Control Box with Electronic Tachometer
Offers a quick and
accurate read of
power, speed and
service intervals.
Canister Air Cleaner
Ensures engine
protection even in high
dust environments.
#1 - Cast-iron cylinder
liners enhance r eli ability and
extend engine life.
#2 - Forged high-carbon steel
crankshaft provides maximum
KEY FEATURES
1 Cast-iron cylinder liners
2 Forged high-carbon steel crankshaft
1
2
3
4
3 Oversized ball bearing support
4 HotSpark
5
5 Electronic low-oil pressure system
®
electronic ignition system
reliability under demanding loads.
#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.
Page 6
RAMMER
BENEFITS
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.
DESIGNED SPECIFICALLY FOR RAMMERS
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.
REINFORCED POWER
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.
RAMMER ENGINE
• 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.
• Reinforced casting parts are strong enough to endure
the toughest conditions.
• Heavy-duty casing with cross bracing ensures durability
in demanding rammer applications.
KEY FEATURES
1 Cast-iron cylinder liners
2 Dual ball bearing crankshaft support
#1 - Aluminum alloy block
with cast-iron cylinder liners
for durability.
#2 - Dual ball bearing crankshaft
support provides reliable
performance even in demanding
rammer applications.
#3 - Vertical cylinder design
maintains an excellent center
of gravity to efficiently transmit
power to the ground, ensuring
performance second to none.
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.
3 Vertical cylinder design
W
4 Specific rammer design
#4 - Specific rammer design
A
F2
F1
ensures exceptional and reliable
performance in a durable,
sustaining package.
Page 7
BENEFITS
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.
ULTRA LIGHT AND WELL BALANCED
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.
POWERFUL AND RESPONSIVE
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.
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
• 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.
Rocker Chamber
Cam Gear Chamber
#1 - Powder metal inserted cam
gear ensures extra protection
for added durability and extended
performance life.
#2 - High-carbon steel crankshaft
KEY FEATURES
1 Powder metal inserted cam gear
2 High-carbon steel crankshaft
with ball bearings on both ends
5
3
1
2
4
3 Connecting rod with needle
bearing inserts
4 Hi-temp fluoride oil seal
5 Automatic decompression system
with ball bearings on both ends
ensures ultimate reliability
in heavy load applications.
#3 - Connecting rod with needle
bearing inserts offers true
bearing support to provide
dependable performance in the
toughest applications.
#4 - Hi-temp fluoride oil seal
ensures maximum protection.
Blow–by (Oil Mist) Flow
Oil Flow
Page 8
SPECIFICATIONS
EX17 EH36 EH65 EH09 EH025
Model Type Piston Displacement (cc) Maximum output (HP/rpm) Maximum torque (ft•lb/rpm) Dry weight (lb)
EX13
EX17
EX21
OVERHEAD CAM
EX27
EH36
OHV
SLANT
EH41
EH63
EH64
EH65
EH72
OHV V-TWIN
Air-cooled, 4-cycle, slant single cylinder, OHC, horizontal PTO shaft
Air-cooled, 4-cycle, slant single cylinder, OHC, horizontal PTO shaft
Air-cooled, 4-cycle, slant single cylinder, OHC, horizontal PTO shaft
Air-cooled, 4-cycle, slant single cylinder, OHC, horizontal PTO shaft
Air-cooled, 4-cycle, slant cylinder, horizontal shaft, overhead valve, gasoline engine
Air-cooled, 4-cycle, slant cylinder, horizontal shaft, overhead valve, gasoline engine
Air-cooled, 4-cycle, V-twin cylinder, horizontal shaft, overhead valve, gasoline engine
Air-cooled, 4-cycle, V-twin cylinder, horizontal shaft, overhead valve, gasoline engine
Air-cooled, 4-cycle, V-twin cylinder, horizontal shaft, overhead valve, gasoline engine
Air-cooled, 4-cycle, V-twin cylinder, horizontal shaft, overhead valve, gasoline engine
126 cc 4.3/4000 6.01/2500 31
169 cc 5.7/4000 8.34/2500 33
211 cc 7.0/4000 10.26/2500 35
265 cc 9.0/4000 13.74/2500 46
404 cc 11.5/3600 20.3/2500 68
404 cc 13.5/3600 21.0/2500 68
653 cc 18.0/3600 31.9/2000 97
653 cc 20.5/3600 32.7/2200 97
653 cc 22.0/3600 33.6/2500 97
720 cc 25.0/3600 39.6/2500 101
EH63V
EH65V
EH09
EH12
RAMMER
EH025
EH035
Air-cooled, 4-cycle, V-twin cylinder, vertical shaft, overhead valve, gasoline engine
Air-cooled, 4-cycle, V-twin cylinder, vertical shaft, overhead valve, gasoline engine
Air-cooled, 4-cycle, single cylinder, horizontal shaft, overhead valve, gasoline engine
Air-cooled, 4-cycle, single cylinder, horizontal shaft, overhead valve, gasoline engine
Air-cooled, 4-cycle, OHV engine
Air-cooled, 4-cycle, OHV engine
MICRO
EH035V
Air-cooled, 4-cycle, OHV engine
Specications subject to change without notice.
653 cc 18.0/3600 31.9/2000 93
653 cc 22.0/3600 33.6/2500 93
86 cc 2.4/3600 3.5/3200 21
121 cc 4.0/4000 5.5/2600 34
24.5 cc 1.1/7000 0.87/5000 6
33.5 cc 1.60/7000 1.30/5000 8
33.5 cc 1.60/7000 1.30/5000 8
Page 9
HISTORY OF INNOVATION
FUTURE OF EXCELLENCE.
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.
PUB-ENGFL rev. 2/2007
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
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