Generac Portable Products 1421-1, Owner'S Manual

Page: 11 / 24

Generac Portable Products 4,000 PSI High Pressure Washer
11
• Make sure the garden hose is connected to the
water inlet. Check that the high pressure hose is
connected to the spray gun and the pump and start
the engine.
• Apply the detergent to a dry surface, starting at
lower portion of area to be washed and work
upward, using long, even, overlapping strokes. Do
Not allow the detergent to dry on. This will
prevent streaking.
• Allow the detergent to soak in between 3–5 minutes
before washing and rinsing. Reapply as needed to
prevent surface from drying.
Pressure Washer Rinsing
WARNING!
Be extremely careful if you must
use the pressure washer from a ladder,
scaffolding or any other relatively unstable
location. Pressure in a running washer builds as
you climb. When you press the trigger, the
recoil from the initial spray could cause you to
fall. The high pressure spray could also cause
you to fall if you are too close to the cleaning
surface.
After you have applied detergent, scour the
surface and rinse it clean as follows:
• Apply safety latch to spray gun.
• Remove the black nozzle from the nozzle extension.
• Select and install the desired high pressure nozzle
following the instructions given in “How to Use the
Nozzles” on page 10.
• Keep the spray gun a safe distance from the area
you plan to spray.
• Increase or decrease the pressure of the spray by
turning the pressure control knob counterclockwise
or clockwise respectively (see Figure 12, typical
pump shown, your unit may differ). Use lower
pressure to wash items such a as a car or boat. Use
higher pressure to strip paint and degrease
driveways.
• Apply a high pressure spray to a small area and
then check the surface for damage. If no damage is
found, you can assume it is okay to continue
cleaning.
• Start at the top of the area to be rinsed, working
down with same overlapping strokes as you used for
cleaning.
Automatic Cool Down System
(also known as Thermal Relief)
If you run the engine on your pressure washer for
3–5 minutes without pressing the trigger on the spray
gun, circulating water in the pump can reach a
temperature between 140–145°F. When the water
reaches this temperature, the automatic cool down
system engages and cools the pump by discharging
the warm water onto the base and ground. This
system prevents internal damage to the pump.
Figure 12 — Pressure Control Knob
Pressure
Control
Knob