Subaru Robin Power Products EH12-2, EH17-2, EH25-2 manual

5-4REASSEMBLY PROCEDURES

0 PRECAUTIONS FOR REASSEMBLY

1)Clean parts throughly before reassembly.

Pay most attentionto cleanliness of piston, cylinde:r, crankshaft, connecting rod and bearings. Scrape off all carbon deposits from cylinder head, piston top and piston ring grooves. Check lip of oil seals. Replace oilseal if the lip is damaged.

Apply oil to the lip before reassembly.

4)Replace all the gaskets with new ones. 5)Replace keys, pins, bolts, nuts, etc.,if necessary.

6)Torque bolts and nuts to specification referring to “TORQUEthe SPECIFICATIONS”. 7)Apply oil to rotating and sliding portions.

8)Check and adjust clearancesand end plays where specifiedin this manual.

54-1CRANKSHAFT

(1)Install crankshaft on crankcase lapping the shaft with polyvinyl tape to avoid damage to oil seal.

(2)Install woodruff key fortheflywheel on critnk- shaft.

54-2 PISTON AND PISTON RINGS

(1)Install the oil ring first, then second ring and top ring. Spreadtheringonlyfarenoughtoslipoverthe piston and into the correctgroove. Use carenot to distort the ring. Installthesecondringwiththepunchedmark

“R”or “N” besidethegap on thetopside.(See Fig. 5-29.)

Fig. 5-26

OPEN ENDS OF PISTON RING

Fig- 5-27

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EH12-2, EH17-2, EH25-2 specifications

Subaru Robin Power Products has established a reputation for quality and reliability in the world of small engines, especially with their EH Series engines: EH12-2, EH17-2, and EH25-2. Each of these models brings unique benefits and advanced technologies, catering to various applications for both commercial and personal use.

The EH12-2 is a compact engine designed for lightweight applications. Weighing in at just 66 pounds, it is ideal for portable equipment and general-purpose applications. Its 4-stroke design allows for lower emissions and greater fuel efficiency compared to traditional 2-stroke engines. The EH12-2 features a low-profile design that enhances stability while operating. Its overhead cam design enables better performance at higher RPMs, making it ideal for tasks that require consistent power and reliability.

Moving up in size, the EH17-2 boasts a more robust configuration, making it suitable for semi-professional applications. With a displacement of 169cc, this engine provides higher torque and improved performance for heavier machinery. The EH17-2 also incorporates Subaru’s advanced air filtration technology, which extends engine life and reduces maintenance frequency. This engine is particularly suited for applications such as generators, pressure washers, and other equipment requiring sustained power output.

Finally, the EH25-2 stands as the powerhouse of the series. With a displacement of 252cc, it delivers exceptional torque and horsepower for demanding tasks. The EH25-2 employs Subaru's patented electronic ignition system, offering easy starts and consistent performance in a range of conditions. Its multi-point lubrication system ensures that all engine parts receive adequate oil, resulting in reduced wear and tear over time. Additionally, the EH25-2's rugged construction is designed to withstand vibration and strain, making it ideal for construction and heavy-duty industrial applications.

All three engines share core features such as a user-friendly design, efficient fuel consumption, and compliance with environmental regulations. The engines are also equipped with easy-access maintenance points, helping users perform necessary upkeep without hassle. Whether for a homeowner with occasional needs or a contractor relying on dependable machinery, Subaru's EH series provides powerful and efficient solutions tailored to meet varying demands. With their focus on innovation and quality, Subaru Robin Power Products continues to evolve and improve, ensuring their engines serve diverse markets effectively.