4-5
Start the engine, measure the voltage between Y wire to W wire of charging/light coil with multimeter (A.C. 200V). The voltage of charging/lighting coil
without load is: when rotate speed of engine changes within the scope of 1500 r/min
～
8000 r/min, the voltage between Y wire to Y wire of charging/light coil
without load should be in the scope of 20±5 V
～
100±20 V. The voltage increases with the increase of the rotate speed.
The voltage will be different from the normal valve considerably if a short circuit or broken circuit occurs on the charging/lighting coil, or the coil is connected
with the metal housing. Replace the charging/lighting coil if necessary.
Charging coil coupler Y/Y/Y wire
is charging/LIGHTING coil
The charging voltage of rectifier is within 13V
～
15V. If it is less
than 13V, and the malfunction is determined from the rectifier, replace
the part with a new one.
Disconnect the connection between rectifier and charging coil from
magneto; check the lighting coil for continuity. If not so, repair or replace
it.
Replace the magneto rotor if the no-load voltage is
different from the normal valve considerably
Remove the flywheel of magneto rotor and check it for
magnetism. Replace it if necessary.
