SELVA MARINE Kingfish 25, Service Manual

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2-9
TECH
FEA
Technical features and description
Balancer
The balancer
1
, which is installed in the opposite direction of the pistons, decreases the engine
vibration by canceling out the primary vibrations produced by the reciprocating motion of the pis-
tons.
Automatic decompression device (manual starter model)
When the starter rope is pulled, the decompression actuator 1 for each exhaust valve retards the
closing timing of the valve to reduce the pressure in the cylinder and decrease the force that is nec-
essary to pull the rope.
When the engine starts, the decompression actuator
1 moves in the direction of the arrow due to
centrifugal force and the closing timing for the exhaust valve returns to the standard timing.
È
Compression pressure
1
1
È