Subaru Robin EX35 - Manual (Page 13)

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4-16 BALANCER
Unbalanced inertia force is cancelled by the balancer
which rotates at the same speed as the crankshaft to
effectively reduce vibration.
4-14 CARBURETOR
The engine is equipped with a horizontal draft
carburetor. The carburetor setting is calibrated after
careful testing for optimum all-round performance
(including starting, acceleration, fuel consumption,
output power characteristics). Special attention is
also paid to the general-purpose use of the engine.
(For further information, refer to page 54, section “13.
CARBURETOR”.)
Fig.4-12
Fig.4-13
4-15 AIR CLEANER
The engine uses an air cleaner that is quieter than
conventional ones. A semi-wet urethane foam
element is used in the STD air cleaner.
Dual element air cleaner (with a primary element of
dry type sponge and secondary element of dry type
paper) and other types are also provided as special
options.
Urethane Element Type
Dual Element Type
AIR
CLEANER
COVER
AIR
CLEANER
BASE
AIR
CLEANER
BASE
URETHANE
FOAM
URETHANE
FOAM
AIR
CLEANER
COVER
PEPER ELEMENT
Fig.4-14
4-17 DECOMPRESSION SYSTEM
The automatic decompression system is mounted on
the camshaft. It opens the exhaust valve before the
compression top, thereby alleviating the compression
pressure and reducing the force required to pull the
recoil starter.
During engine operation, the decompression system
is overpowered by centrifugal force and compression
is fully utilized to produce power.
Fig.4-15
RETURN SPRING
ROCKER ARM
(EXHAUST VALVE SIDE)
EXHAUST VALVE
CAMSHAFT