Spark Plug - Master B35CED Owner's Manual

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 using 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.
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
4110.607
Spark Plug
Mounting Nut
Burner Strap
Spark Plug
Spark Plug Wire
Nozzle
Assembly
Fuel Line
Hose
Bend Here to
Adjust Gap
1.4 mm (.055") Gap
SERVICE PROCEDURES
Burner
Strap
Figure 13 - Spark Plug Rotation, 35,000 Btu/Hr Model Only
SPARK PLUG
(70/100/150,000 Btu/Hr Models)
1. Remove upper shell (see page 8).
2. Remove fan (see page 13).
3. Remove spark plug wire from spark plug.
4. Remove spark plug from burner head using 13/16" open-end
wrench.
5. Clean and regap spark plug electrodes as follows:
70/100,000 Btu/Hr Models:
1.9 mm (.075") gap
150,000 Btu/Hr Model:
2.8 mm (0.110") gap
6. Install spark plug in burner head.
7. Attach spark plug wire to spark plug.
8. Replace fan (see page 13).
9. Replace fan guard and upper shell.
Burner
Head
Figure 14 - Spark Plug Removal, 70/100/150,000 Btu/Hr Models
Figure 15 - Spark Plug Gap, 70/100/150,000 Btu/Hr Models
Burner
Strap
Spark Plug Wire
Spark Plug
Bend Here to
Adjust Gap
Gap
9 9