Desa REM50B, B50G owner manual Pump Pressure Adjustment, Fuel Filter, Spark Plug

Pump Pressure

Adjustment

1.Remove pressure gauge plug from filter end cover.

2.Install accessory pressure gauge (part number HA1180).

3.Start heater (see Operation, page

6). Allow motor to reach full speed.

4.Adjust pressure. Turn relief valve to right to increase pressure. Turn relief valve to left to decrease

pressure. Set pump pressure at 3.4 psi.

5.Remove pressure gauge. Replace pressure gauge plug in filter end cover.

Fuel Filter

1.Remove side cover screws using 5/16" nut-driver.

2.Remove side cover.

3.Pull upper fuel line off fuel filter neck.

4.Carefully pry bushing and fuel filter out of fuel tank.

5.Wash fuel filter with clean fuel and replace in tank.

6.Attach upper fuel line to fuel filter neck.

7.Replace side cover.

Spark Plug

1.Remove upper shell (see page 9).

2.Remove fan (see page 9).

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 .055" gap.

10.Replace burner strap onto spark plug. Rotate burner strap to position spark plug electrodes (see Figure 12, page 11).

11.Tighten spark plug with spark plug mounting nut.

12.Release hex-body of spark plug from vise.

10 Continued

Pressure	Relief
	Valve
Gauge
Plug
Figure 7 - Pressure Gauge Plug Removal	Pressure
	Gauge

Fuel Filter Figure 8 - Adjusting Pump Pressure

Side

Cover

Upper Fuel Line

Figure 9 - Fuel Filter Removal

Combustion	Spark Plug
	Mounting Nut
Chamber	Burner	Spark
	Strap		Spark Plug
		Plug
			Wire

	Nozzle Assembly
Air Line	Fuel Line Hose
Hose

Figure 10 - Spark Plug Removal

Bend Here to Adjust Gap

.055" Gap

Figure 11 - Spark Plug Gap

102016