Subaru EX27 Parts Manual

Pages 44

Year 2008

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Subaru EX27 Engine Specification

The Subaru EX27 engine is a robust and reliable power unit designed for a wide range of applications, particularly in industrial and commercial settings. This air-cooled, 4-stroke, single-cylinder engine boasts a displacement of 265 cubic centimeters and is engineered to deliver an impressive power output of approximately 9.0 horsepower at 4,000 RPM. Its overhead cam (OHC) design enhances performance by providing efficient valve operation, reducing mechanical noise, and ensuring optimal fuel combustion. The EX27 features a bore and stroke of 3.0 inches by 2.3 inches, contributing to its efficient power delivery and smooth operation.

This engine is equipped with a recoil start system, ensuring reliable and easy starting under various conditions. It utilizes a transistorized magneto ignition system, which offers consistent spark generation and contributes to the engine's dependability. The lubrication system is a splash type, effectively maintaining engine components' integrity by reducing friction and wear.

The EX27's fuel system is designed for efficiency and reliability, incorporating a float-type carburetor that ensures a steady fuel supply for consistent engine performance. This engine has a fuel tank capacity of approximately 1.6 gallons, allowing for extended operation without frequent refueling.

Weighing around 40 pounds, the Subaru EX27 engine is designed for portability while maintaining structural integrity and durability. It is suitable for powering generators, pumps, compressors, and other equipment requiring a compact and efficient power source. The engine's design emphasizes longevity and ease of maintenance, with accessible components facilitating straightforward servicing. Overall, the Subaru EX27 engine combines reliability, efficiency, and performance, making it a preferred choice for demanding applications.

Subaru EX27 Engine F.A.Q.

What is the recommended oil type for the Subaru EX27 engine?

The recommended oil type for the Subaru EX27 engine is SAE 10W-30 for general use. However, you should check the owner's manual for specific temperature ranges and conditions.

How often should I change the oil in my Subaru EX27 engine?

It is recommended to change the oil in your Subaru EX27 engine every 100 hours of operation or at least once a season, whichever comes first.

What is the correct spark plug gap for a Subaru EX27 engine?

The correct spark plug gap for a Subaru EX27 engine is 0.028-0.031 inches (0.7-0.8 mm).

How can I troubleshoot starting issues with my Subaru EX27 engine?

To troubleshoot starting issues, check the fuel level, ensure the spark plug is functioning, verify the air filter is clean, and inspect the ignition system and fuel line for any blockages or damage.

What is the maintenance schedule for the Subaru EX27 engine?

Regular maintenance includes checking the oil level before each use, changing the oil every 100 hours, cleaning the air filter every 200 hours, and inspecting the spark plug and fuel system periodically.

How do I properly store my Subaru EX27 engine during the off-season?

To store the engine, drain the fuel system, change the oil, remove the spark plug and add a teaspoon of oil into the cylinder, then pull the recoil starter to distribute the oil, and store in a dry, covered location.

What should I do if my Subaru EX27 engine overheats?

If the engine overheats, stop the engine immediately, check the oil level, ensure proper ventilation, clean any debris from the cooling fins, and inspect the air intake and exhaust systems.

How can I improve the fuel efficiency of my Subaru EX27 engine?

To improve fuel efficiency, regularly maintain the engine, ensure the air filter and spark plug are clean, use fresh fuel, and operate the engine at optimum load conditions.

What is the recommended procedure for replacing the air filter in the Subaru EX27 engine?

To replace the air filter, remove the air cleaner cover, take out the old filter, insert a new filter, and secure the cover back in place, ensuring a proper seal.

Can I use ethanol-blended fuels in my Subaru EX27 engine?

Yes, you can use ethanol-blended fuels up to 10% ethanol (E10) in your Subaru EX27 engine. Avoid using higher ethanol blends as they may cause damage or performance issues.