Master BY100CEB Owner's Manual page 9

SERVICE
PROCEDURES
Continued
Spark Plug
(35,000 Btu/Hr Model)
1. Remove upper shell (see page 8).
2. Remove fan (see page 13).
3. Remove fuel and air line hoses from
nozzle assembly.
4. Remove spark plug wire 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 us-
ing 11/16" open-end wrench.
8. Remove burner strap from spark plug.
9. Clean and regap spark plug electrodes
to 1.4 mm (.055") gap.
10. Replace burner strap onto spark plug.
Rotate burner strap to position spark
plug electrodes (see Figure 13).
11. Tighten spark plug with spark plug
mounting nut.
12. Release hex-body of spark plug from
vise.
13. Replace burner strap onto combustion
chamber.
14. Attach spark plug wire to spark plug.
15. Attach fuel and air line hoses to nozzle
assembly.
16. Replace fan (see page 13).
17. Replace fan guard and upper shell.
103618
Spark Plug
Mounting Nut
Combustion
Chamber
Air Line
Hose
Figure 11 - Spark Plug Removal, 35,000
Btu/Hr Model
Figure 12 - Spark Plug Gap, 35,000 Btu/Hr
Model
Burner
Burner
Strap
Strap
Figure 13 - Spark Plug Rotation, 35,000
Btu/Hr Model Only
9
OWNER'S MANUAL
Spark Plug
(70/100/150,000 Btu/Hr Models)
Burner Strap
1. Remove upper shell (see page 8).
2. Remove fan (see page 13).
Spark Plug
3. Remove spark plug wire from spark plug.
Spark
4. Remove spark plug from burner head
Plug
using 13/16" open-end wrench.
Wire
5. Clean and regap spark plug electrodes
as follows:
70/100,000 Btu/Hr Models:
Nozzle
1.9 mm (.075") gap
Assembly
150,000 Btu/Hr Model:
2.8 mm (0.110") gap
Fuel Line
Hose
6. Install spark plug in burner head.
7. Attach spark plug wire to spark plug.
8. Replace fan (see page 13).
Bend Here
9. Replace fan guard and upper shell.
to Adjust
Gap
Burner
Head
1.4 mm
(.055")
Gap
Figure 14 - Spark Plug Removal, 70/100/
150,000 Btu/Hr Models
Figure 15 - Spark Plug Gap, 70/100/150,000
Btu/Hr Models
Spark
Plug
Wire
Spark
Plug
Bend Here
to Adjust
Gap
Gap
Continued