4 - 2 CRANKSHAFT

Thecrankshaft is madeofaforgedchromeandmolybdic steel piece with the crank pins and the journals ground t o high precision after induction hardening. It is fitted to the flywheel on the fan side, and connection of the drive shaft to it is also possible. In the center of the pins and the jour- nals, holes for forced lubrication aredrilled through.

(See Fig. 2.)

4-3CONNECTINGROD and PISTON

4 - 3 - 1 CONNECTING ROD

The connecting rod is made of forged pieces of aluminum alloy designed with sufficient strength to withstand buckling and tensile forces inflicted on it under high-load operating conditions. At the small end a bushing is forcefitted to with- stand thepressure resultant from pitching duringhigh-speed operation. At the larger end thin kelmetis fitted forincreas- ing durability.

4 - 3 - 2 PISTON

Piston is made of cast aluminum alloy, and it hastwo com- pression rings and an oil ring.Combustion chamber arranged atthepistionhead, where combustion gas is made up by mixing atomized fuel and air, andignites. (See Fig. 3.)

4-4CYLINDER and CYLiNDERHEAD

4-4-1 CYLINDER

Cylinder is made of aluminum alloy diecasting, in which special cast iron liner is cast, andis provided with many cool- ing fins designed for effective cooling.

4 - 4 - 2 CYLINDERHEAD

The most important partof the diesel engine is cylinderhead. It is a one-piece of aluminum alloy die casting, in which in- take and exhaust ports, and rocker chamber are cast in the most ideal structure for the highest strength and the high- est cooling efficiency. In thevalve seats fine quahty heat re- sistance seats are pressure-fitted considering high resistance

-to abrasionandcorrosionat high temperature. (See Fig. 4.)

-

Fig. 2

Fig. 3

Fig. 4

- 6 -

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Subaru Robin Power Products DY35, DY41, DY30 manual Cylinderhead
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DY41, DY30, DY35 specifications

Subaru Robin Power Products have built a solid reputation in the realm of portable engines and generators, particularly with their DY35, DY30, and DY41 models. These engines are extensively used for various applications, ranging from construction to agricultural equipment, owing to their reliability and efficiency.

The Subaru DY35 engine exemplifies performance with a displacement of 35cc. Its lightweight design ensures easy portability, while its robust construction provides durability in demanding environments. Featuring a two-stroke cycle, the DY35 offers a high power-to-weight ratio, making it ideal for handheld equipment and compact machinery. Key characteristics include its advanced electronic ignition system that promotes easy starting and reliable operation. The DY35 also boasts superior fuel efficiency, which translates to lower operational costs over time.

Moving on to the DY30, this engine is designed with versatility in mind. It has a slightly smaller displacement of 30cc, making it a great choice for various power tools and smaller machinery. The DY30 is known for its excellent torque delivery, which allows users to tackle challenging tasks without the need for frequent refueling. One of its standout features is the automatic lubrication system that keeps the engine running smoothly while minimizing wear and tear. This feature significantly extends the engine’s life, making it a favorite among users looking for long-term performance.

The DY41 takes a step up in power with a displacement of 41cc, making it suitable for heavier-duty applications. Designed for larger equipment, the DY41 is renowned for its high torque and robust construction. It also includes an innovative cooling system that effectively dissipates heat, ensuring optimal engine performance in prolonged usage scenarios. The DY41 is equipped with advanced vibration-dampening technology, which enhances user comfort and reduces fatigue during operation.

Each of these Subaru Robin engines incorporates fuel-efficient technologies that reduce emissions and comply with environmental regulations. They are built to withstand the rigors of demanding work environments while providing reliable power. With their distinct features and durable designs, the DY35, DY30, and DY41 engines continue to be sought-after choices for professionals and hobbyists alike, underscoring Subaru's commitment to innovation and quality in power products.
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