Yanmar 4JH4E - Wiring Diameter of a Starting Motor

12. Electrical system
303
(2) Structure
When the starting switch is turned on, a magnet
switch takes a voltage, and a pinion projects. The
pinion engages with the ring gear of a engine, and
the engine is started.
12.3.4 Wiring diameter of a starting
motor
1) When a starting switch is turned on, a
magnet switch is charged, and a moving core
is absorbed, and a pinion clutch is moved
forward through a lever, and the pinion
engages with a ring gear.
2) When the pinion engages the ring gear,
because a main contact point is closed and
the main electric current flows and a pull coil
is short-circuited by the main contact point
and it stops being charged with electricity, the
pinion is kept at the position by a holding coil
during the start.
3) When the starting switch is turned off, the
main contact point becomes open, and the
pinion clutch is returned to the stop position
by a return spring.
Armature
Yoke
Brush
Rear cover
Pinion shaft
Center bracket (A)
Center bracket (P)Internal
gear
Planet
gear
Pinion
Gear case
Shift lever
Torsion spring
Magnetic switch
010668-01E
B
M
S
Mag
Mag
Starting switch Magnetic switch
Battery Starting motor
011064-00E