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0725-774
136
0725-773
BTDC 22°/6000 rpm
BTDC 20'/6000
rpm
BTDC 18°/6000
rpm
BTDC 15'/6000
rpm
Rotor
Magneto
Case
BTDC 3 a ' 3 l i
BTDC 28'~
BTDC 26°
BTDC
24'~
BTDC
22'~.-----
BTDC
2a'-~
BTDC
18'~'~
BTDC
16,/r-
BTDC
l4'-j
BTDC 12'./
Fig. 8-17
Stator
Fig. 8-16
Magneto Case-
6.
Install starter pulley.
7.
Start the engine and allow it to warm up
thoroughly. Check the timing with a timing
light. The 18° BTDC timing mark must align
with the boss of the magneto housing when
the engine is at 6000 rpm. If the marks were
made according to step three, both marks
must be aligned.
The meter should be read 0.14 ohm.
II
NOTE: If charge coil and trigger coil output
tests are satisfactory, but the COl test is
negative, COl unit must be replaced.
4.
Grasp the recoil and crank engine over
quickly. If tester light illuminates. trigger coil
output is satisfactory. Repeat the test three
times for conclusive results. If light fails to
illuminate, replace the trigger coil and
charge coil as a set.
Set the tester dial on the 70 LOW reading.
2.
Connect the red lead of the tester to the black
and red wire in the triple plug; then connect
the remaining tester lead to the black and
white wire in the triple plug.
4.
The timing can be preset during engine
repair by examining the position of ignition
components.
2.
Rotate the drive clutch clockwise 1.86 mm or
0.073 in. (corresponds to 18° BTDC).
Ignition Timing
3.
Make a reference mark on both the drive
clutch and the engine. Use this mark to check
timing.
1.
Using a dial indicator, find top dead center
(TDC) of the PTO side cylinder.
2.
Connect the ohmmeter leads to the two
yellow leads in the engine connector.
Lighting Coil Resistance Test
5.
Use the stator plate marks to preset timing.
Rotate plate to align correct marks; then
tighten screws securely.
1.
Disconnect the main wiring harness from the
engine connector.
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