Service Manual
The ignition coil contains two separate windings
inside the coil casing (Figure 2-9). Use an Ohm-
meter to check the resistance levels of each wind-
ing. To check the primary winding, disconnect the
ignition switch wire and connect the positive lead
of the Ohmmeter to the ignition coil lead. Connect
the negative lead to the engine frame (ground).
The
primary winding resistance is ohms
(Rxl
scale). To check the secondary winding, disconnect
the high tension wire at the spark plug. Connect
the positive lead of the Ohmmeter to the high ten-
sion wire. Connect the negative lead to the engine
frame (ground). The secondary coil resistance
should be 5800-7940 ohms
(Rxl
000
scale). The
ignition coil must be replaced
if
the resistance
levels are incorrect.
Ignition Switch Wire
High Tension Wire
\
ohms
Primary
Coil
Secondary
Coil
(R
x
1000
scale)
5800-7940
ohms
Ground
Model
47P22
Figure 2-9
The ignition coil used on models 47PD3, 47PE4,
and 47PF5 consists of the main coil, high tension
wire and ignition kill wire (See Figure 2-1
0).
Testing of the coil may becompleted with a
Graham
Lee ignition tester model number 31-SMXH. In-
structions for testing are included with the tester.
High Tension
Wi
Figure 2-1
0
GOVERNOR
The governor linkage is factory preset to regu-
late the engine speed at
3000
150 RPM.
Check the adjustment of the governor
if
the
engine is suspected of improper speed. To gain
access to the governor linkage removal of the
air cleaner is recommended. (See Disassembly
Instructions.) Before adjusting the governor,
inspect the control linkage for bent, broken and
worn parts. Loosen the governor arm clamping
bolt and use a screwdriver to spread the gover-
nor arm clamp (Figure 2-1 1).
Figure 2-1 1
Adjust the governor by holding the governor
lever to the right while turning the governor shaft
to the right. Hold the adjustment and tighten the
clamp bolt (Figure 2-1 2).
Figure 2-1
2
Connect the return spring to the center hole in
the governor spring bracket. The center hole
should govern the engine speed at the recom-
mended
3000
RPM. The top hole will raise the
engine speed 150
RPM
and the bottom hole will
lower the engine speed 150 RPM. Engine speed
can be verified using a tachometer such as listed
in the Special Tools Section. (See page
1-6).
II
-4