Subaru Subaru EX27 User manual

Full Line
ENGINES

The power of Innovation.
As one of the largest engine manufacturers in the world, Subaru produces more
than 1.2 million engines annually for every type of market. Collectively sharing
technologies from our Automotive, Aerospace and Eco Technologies divisions, our
engines power innovation in every industry we serve. With a five-year warranty and
a parts and service network numbering more than 5,000, our support after the sale
is second to none.
With more than 50 years of superior operation and unmatched quality, Subaru
engines have earned a worldwide reputation for exceptional performance and
unbeatable reliability. A hallmark of the Subaru line, our chain-driven overhead cam
technology sets the bar for the industry.

Reliability. Dependability. Serviceability. Count on it from Subaru.
Subaru’s
Industry Leading Warranty
Subaru does more than lead the industry in technology and innovation.
We lead the way in customer service too. And our warranty policy is no
exception. We were the rst engine manufacturer to offer a ve-year
warranty on our EX and V-Twin engines - and the only to honor it. Enjoy a
guaranteed, hassle-free claim process, where all “ties” go to the customer.
We believe it’s about more than just superior engines – it’s investing in
superior service and peace of mind.

*for 6 hp and above ** select models only
EX Series
Overhead Cam
•
Charging Systems up to 200 Watts*
•
Electronic Low Oil Shut-Off System
•
Key, Tapered or Threaded Shafts
•
Manual and 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
Advanced technology. Experienced craftsmanship. Subaru EX engines lead the industry.
Featuring nine models from 4.3 to 14 horsepower, the EX engines offer superior performance
and durability over same-class competitive models.
Subaru engine models available in EPA Phase 3, CARB Tier 3, EU Stage II emission compliant and Canadian ICES regulation compliant congurations.
Rotating Screen
Provides superior
protection from
unwanted debris.
•
Solenoid-Actuated Idle Control**
•
Manual** or Remote Control Choke
•
Multiple Air Cleaner Options

EX13 |EX17 |EX21 |EX27 |EX30 | EX35 |EX40
4.3-14.0 HP
2
4
3
5
1
2
3
4
5
Chain-Driven Overhead Cam
Enables the engine to breathe better and run quieter.
OHC technology, in combination with the hemispherical
combustion chamber, elevates starting ease and
eliminates kickback. Required pulling force is reduced
by 30 to 40 percent with an automatic decompression
system. Engines start instantly – even at temperatures
as cold as -10ºC – without any perceptible kickback.
Optimized Capacity Rigid Muffler
Combined with 33 percent fewer moving parts, ensures
noise levels a full 2 dbA below competitive models.
Dual Ball-Bearing Crankshaft Support
Ensures maximum stability and durability in the most
demanding conditions.
Hemispherical Combustion Chamber
Provides optimum intake and exhaust valve placement
allowing up to 9:1 compression ratio for superior
performance and efficiency.
Case-Hardened Steel Timing Chain
Allows for precision timing and maximum durability.
Features & Benefits
1

EH Series
Overhead Valve V-Twin
Provides superior
lubrication and long
engine life.
Full-Pressure Lubrication System with Spin -On Oil Filter
•
Multiple Muffler Kits
•
Key Switch with Electronic
Tachometer/Hour Meter
•
15 or 30 Amp Charging Systems
•
LP/NG Fuel System (EH72)
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
•
Manual & Remote Cable
Throttle & Choke Controls
•
Oil Drain Extensions
•
Rotating Flywheel Screen
•
Oil Cooler (EH72)
•
Flywheel Stub Shaft
•
Electronic Fuel System (EH72)
Factory Options
Only one word is needed to describe the Subaru V-Twin line: Workhorse. Five models with
horsepower from 20.5 to 28 deliver high power and performance in a small package. With Subaru
technology, rest assured these engines offer maximum durability, easy starts and long life.
Subaru engine models available in EPA Phase 3, CARB Tier 3, EU Stage II emission compliant and Canadian ICES regulation compliant congurations.

Features & Benefits
5
1
2
3
4
5
Cast-Iron Cylinder Liners
Enhance reliability and extend engine life.
High Carbon Steel Crankshaft
Provides maximum reliability.
Large Main Bearing Support on the PTO Side of Crankshaft
Minimizes shock under heavy loads.
Low Oil Pressure Sensor
Alerts operator when oil pressure drops too low.
HotSpark®Electronic Ignition System
Ensures accurate ignition timing to deliver reliable
starting performance, while offering smooth idling and
reduced fuel consumption.
Large-Capacity Air Cleaner with Dual Elements
Protects the engine from harmful dust and debris.
EH64 |EH65 |EH65V |EH72 |EH72 FI
6
6
2
3
4
1
20.5-28.0 HP

EH & ER Series
Rammer
1
2
3
Features & Benefits
Balanced. Durable. Powerful. It all adds up to a rammer engine like no other. Unlike
competitors, Subaru designed its engines from the ground up strictly for rammer
applications. They are carefully balanced and engineered to be lightweight for optimal
performance, yet able to deliver the most power and torque.
Cast-Iron Cylinder Liners
Resist wear and enhance durability for better compression,
more power and prolonged engine life.
Dual Ball-Bearing Crankshaft Support
Reduces friction and increases power delivery to the crankshaft.
Vertical Cylinder Design
Maintains an ideal center of gravity to effectively transmit
power to the ground.
Specific Rammer Design
Ensures a unit that’s balanced, lightweight and powerful for demanding rammer applications.
Low Oil Pressure Sensor (ER12)
Shuts off the engine if oil pressure level drops too low.
4
Subaru engine models available in EPA Phase 3, CARB Tier 3, EU Stage II emission compliant and Canadian ICES regulation compliant congurations.
5
4
1 2
3

Rammer Engine
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 design requires that the entire machine be balanced on the center of the foot in both the front to back
axis and side to side axis.
Because the engine is mounted to the side of the rammer’s leg, 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 as well as evenly on the side to side axis for optimum compaction performance and easy operation.
W
A
F2
F1
EH09 | ER12
2.8-3.5 HP

•
Electric Start 15-Watt Charging System
•
Key, Tapered Shafts
•
Manual and Cable Remote Throttle Control
•
Multiple Air Cleaner Options
Accommodates a
compact design for
generator applications.
Low-Profile Air Cleaner
For quick, convenient
and easy starting.
Electric Start
Factory Options
Engineered with the exclusive Subaru OHC technology of our maximum durability
engines, the SP Series engines offer maximum value for light commercial and premium
residential equipment.
SP Series
Overhead Cam
Subaru engine models available in EPA Phase 3, CARB Tier 3, EU Stage II emission compliant and Canadian ICES regulation compliant congurations.
Ensures engine
protection even in high
dust environments.
Dual Element Cleaner