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

3. FEATURES ,

1.Theoverheadvalvedesignoffers a compactness,lightweightandidealcombustioncharacteristics resulting in more power from Iess fuel and prolonged engine life.

2.An optimum lubrication and better tilted operation thanks to upright cylinder design.

3.A crossflow arrangement of intake and exhaust ports ensures stable performance under high ambient temperature.

4.Theautomaticdecompressiomsystemlightens the recoilpull force by 40% comparingtothe conventional SV engines.

5.An easy operation thanks to integrated engine control system. Improved throttle mechanism is adopted for easy starting.

6.Combustionandmechanicalnoiseshavebeenanalyzedacousticallyandimprovedforbettertonal quality and lower engine noise.

7.Optimallydesignedreciprocatingpartsreducethevibrationlevelof theengine. EH25-2engine equips single through-balancer shaft as an option.

4.GENERAL DESCRIPTIONOF ENGINE COMPONENTS

4-1 CYLINDER AND CRANKCASE

The cylinder and crankcaseis single piece aluminum

diecasting.Thecylinderliner,made of specialcast iron, is molded into the aluminum casting.

The crankcase has a mounting surface. on the output shaft side, where the main bearing cover is attached.

Fig. 4-1

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4-2MAIN BEARING COVER

Themainbearingcover is analuminumdiecasting,

which is mounted on theoutputshaftside of the crankcase.

Remove the main bearing cover to inspect the inside of the engine.

The pilots and bosses are machined on the cover for direct mounting of the engine onto such machines as generators and pumps.

Oil gauge (fillers) are on both sides of the cover for easy maintenance.

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OIL GAUGE OIL GAUGE

Fig. 4-2

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