PUMP PRESSURE
ADJUSTMENT
1. Remove pressure gauge plug from filter
end cover (see Figure 9).
2. Install 0-15 PSI pressure gauge.
3. Start heater (see Operation, page 6). Al-
low heater to reach operating temperature
(approx. 10 minutes).
4. Adjust pressure. Turn relief valve to right
to increase pressure. Turn relief valve to
left to decrease pressure. See specifica-
tions in Figure 10 for correct pressure.
5. Remove pressure gauge. Replace pres-
sure gauge plug in filter end cover.
Pressure
Gauge
Plug
Figure 9 - Pressure Gauge Plug Removal
Pressure
Gauge
Pump
Model Pressure
80
3.8 PSI
145 6.8 PSI
220 8.4 PSI
Figure 10 - Adjusting Pump Pressure
160930-01A
SERVICE PROCEDURES
Relief
Valve
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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 (see
Figure 11).
4. Carefully pry bushing, fuel filter, and lower
fuel line out of fuel tank (see Figure 11).
5. Wash fuel filter with clean fuel and replace
in tank.
6. Attach upper fuel line to fuel filter neck.
7. Replace side cover.
Side Cover
Figure 11 - Fuel Filter Removal
Fuel Filter,
Bushing, and
Lower Fuel Line
Upper Fuel Line
11