Features - Robin EH09D Service Manual

3. FEATURES

1. The EH09D and EH12-2D engines are designed exclusively for rammers.
Optimum lubrication and better inclined operation are obtained thanks to upright cylinder design.
2. Easy operation
These engines, with its upright cylinder, reduce swinging moment and achieved easier operation for
rammers.
Because the direction of vibratory force caused by reciprocating parts, such as piston and connecting
rod, is the same as the jumping direction of the rammer itself. Furthermore, these engines are de-
signed carefully to balance the weight on the rammer by locating the air cleaner and muffler symmetri-
cally with the center line of the cylinder.
3. Improved durability
Vibration damping and durability are greatly improved by introducing a vibration-proof breather mecha-
nism, thick sheet metal, reinforced casting parts with thick walls and ribs, and a carburetor that pre-
vents fuel leakage when the engine is inclined.
4. Ideal engine performance for rammer
The overhead valve design offers ideal combustion characteristics.
More emphasis was placed on the continuous rated power of the engine than its maximum power,
considering operating characteristics when the engine is mounted on a rammer.
5. Easy starting
Combining an ignition system with an advanced spark timing and mechanical compression release
improves start-ability. Equipped with a low-speed governor, it can be started without operating the
throttle.
6. Economical and clean engine
These engines achieved fuel-efficiency and cleanliness, reducing polluting exhaust emission remark-
ably.
- 6 -