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099618
Spark Plug
(35/50 Models)
1. Remove upper shell (see page 12).
2. Remove fan (see page 12).
3. Remove fuel and air line hoses
from nozzle assembly.
4. Remove spark plug cable from
spark plug.
5. Remove two screws using 5/16"
nut-driver and remove burner strap.
6. Place hex-body of spark plug into
vise and tighten.
7. Remove spark plug mounting nut
using 11/16" open-end wrench.
8. Remove burner strap from spark
plug.
9. Clean and regap spark plug
electrodes to .055" (1.4 mm) gap.
10.Replace burner strap onto spark
plug. Rotate burner strap to
position spark plug electrodes as
shown in Figure 19.
11.Tighten spark plug with spark plug
mounting nut.
12.Release hex-body of spark plug
from vise.
13.Replace burner strap onto combus-
tion chamber.
14.Attach spark plug cable to spark
plug.
15.Attach fuel and air line hoses to
nozzle assembly.
16.Replace fan (see page 12).
17.Replace fan guard and upper shell.
Air Line
Hose
Burner
Strap
Spark Plug
Cable
Nozzle Assembly
Fuel Line Hose
Spark
Plug
Spark Plug
Mounting Nut
Figure 17 - Spark Plug Removal, 35/50 Models
Combustion
Chamber
Bend Here
to Adjust
Gap
Figure 18 - Spark Plug Gap, 35/50 Models
Burner
Strap
45°
Figure 19 - Spark Plug Rotation, 35/50 Models
Spark Plug
(70/100/150 Models)
1. Remove upper shell (see page 12).
2. Remove fan (see page 12).
3. Remove spark plug cable from
spark plug.
4. Remove spark plug from burner
head using 13/16" open-end
wrench.
5. Clean and regap spark plug elec-
trodes as follows:
70/100 Models = .055" (1.4 mm) gap
150 Model = .075" (1.9 mm) gap
6. Install spark plug in burner head.
7. Attach spark plug cable to spark plug.
8. Replace fan (see page 12).
9. Replace fan guard and upper shell.
Spark
Plug
Spark Plug
Cable
Burner
Head
Figure 20 - Spark Plug Removal, 70/100/150 Models
Figure 21 - Spark Plug Gap, 70/100/150 Models
.055" (1.4 mm) Gap
Bend Here
to Adjust
Gap
Gap