Subaru ER12 - 4-15 Air Cleaner; 4-16 Decompression System

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4-15 AIR CLEANER
The air-cleaner is a heavy-duty type with a dual
element system; the primary one is an urethane foam
(semi-wet) and secondary one is a semi wet type
element
AIR CLEANER BASE
ELEMENT
URETHANE FOAM
AIR CLEANER COVER
4-16 DECOMPRESSION SYSTEM
The automatic decompression system is mounted on
the campulley 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
RETURN SPRING
ROCKER ARM
(EXHAUST VALVE SIDE)
EXHAUST VALVE
CAMSHAFT