Subaru EH72D User Instructions

Pages 35

Year 2002

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Subaru EH72D Engine Specification

The Subaru EH72D engine is a robust, air-cooled, V-twin gasoline engine designed for a variety of commercial and industrial applications. It boasts a displacement of 720cc, which delivers a power output of approximately 25 horsepower at 3,600 RPM, providing a reliable balance of performance and efficiency. This engine features an overhead valve (OHV) design, contributing to its efficient fuel combustion and reduced emissions. Its dual-cylinder configuration enhances the engine’s balance and smoothness, reducing vibration and noise during operation.

The EH72D incorporates a high-performance lubrication system with a full-pressure lubrication pump and an oil cooler, ensuring optimal engine temperature and prolonged operational life. Its transistorized magneto ignition system ensures reliable starting and consistent performance. The engine is equipped with a large-capacity air cleaner that effectively filters dust and debris, enhancing durability in demanding environments.

For fuel management, the engine utilizes a high-capacity float-type carburetor that ensures efficient fuel delivery and optimal performance across various operating conditions. The heavy-duty recoil starter and optional electric starter provide flexibility and ease of use. Engine maintenance is facilitated by easily accessible components, including a spin-on oil filter and dual-element air cleaner.

Designed with durability in mind, the EH72D features a cast-iron cylinder liner and a forged steel crankshaft, contributing to its extended lifespan under rigorous use. The engine's compact design and adaptable mounting options make it versatile for integration into a wide range of equipment. With its combination of power, reliability, and efficiency, the Subaru EH72D engine is a preferred choice for powering generators, pumps, and other heavy-duty machinery.

Subaru EH72D Engine F.A.Q.

What is the recommended oil type for the Subaru EH72D engine?

The recommended oil type for the Subaru EH72D engine is SAE 10W-30 or 10W-40, depending on the ambient temperature. Always refer to the owner's manual for specific recommendations.

How often should I change the air filter on my Subaru EH72D engine?

It is recommended to inspect and clean the air filter every 100 hours of operation. Replace it if it shows signs of excessive dirt or damage.

What is the proper spark plug gap for the EH72D engine?

The proper spark plug gap for the Subaru EH72D engine is 0.028 to 0.031 inches (0.7 to 0.8 mm).

How can I troubleshoot if my Subaru EH72D engine won't start?

If the engine won't start, check the fuel level, ensure the spark plug is functioning, inspect the fuel lines for clogs, and verify that the ignition switch is working properly.

What is the correct procedure for adjusting the valve clearance on a Subaru EH72D engine?

To adjust the valve clearance, remove the valve cover, rotate the engine to TDC on the compression stroke, and use a feeler gauge to set the intake and exhaust valves to the specified clearance as per the service manual.

How do I maintain the cooling system of the Subaru EH72D engine?

Regularly inspect the cooling fins for debris and clean them using compressed air. Check the coolant level and replace it as recommended by the manufacturer.

What is the recommended fuel type for the EH72D engine?

The recommended fuel type for the Subaru EH72D engine is unleaded gasoline with an octane rating of 87 or higher.

How do I store the Subaru EH72D engine for a long period?

To store the engine long-term, drain the fuel system, change the oil, clean the exterior, and store it in a dry place. Consider using a fuel stabilizer if fuel cannot be drained.

What should I do if the EH72D engine is overheating?

If the engine is overheating, check for blockages in the cooling fins, ensure the oil level is adequate, and verify that the engine is not overloaded.

How can I improve the fuel efficiency of my Subaru EH72D engine?

To improve fuel efficiency, ensure regular maintenance is performed, keep the air filter clean, use the correct fuel, and operate the engine within its optimal rpm range.