Subaru Robin Power Products EX27 Overhead Cam, Factory Options, Key Features, Advanced Technology

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