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Hotsy 5645 • 97-6850 • Rev. 8/03
To Start
DANGER: DO NOT point wand or spray gun at your-
self or at any person. Bodily injury may result from
water under high pressure.
IMPORTANT: The water must be turned on before
starting. Running the pump dry will cause damage
and void warranty.
IMPORTANT: DO NOT allow the machine to run with
trigger gun closed for more than 3 minutes at any
time or damage to pump may occur.
1. Turn water ON.
2. Hold wand firmly with trigger gun in the closed posi-
tion.
3. Turn fuel shut-off valve counterclockwise (CCW) to
open. Move choke lever to full choke position. Choke
may not be needed on warm engine.
4. Move throttle control to half throttle.
5. Turn key on engine clockwise (CW) hold until engine
starts.
DO NOT
crank engine for longer than 15 sec-
onds at any one time or starter damage may occur. If
the engine does not start, it may have air in the gas
lines and be unable to pull gasoline from the fuel tank.
This symptom may appear if the engine has not been
run recently or had been run until all gasoline was
depleted from gas lines.
6. When the engine starts, move choke lever until
engine runs smoothly. Then move throttle control to
full throttle. When engine warms, move choke to no
choke position.
IMPORTANT: To allow for proper battery charging and
AC generator operation the throttle control MUST be
kept in full throttle position as soon as choke lever is
placed in no choke position.
7. Holding wand firmly, squeeze the trigger gun open.
Allow air to purge from system.
8. If hot water is desired, adjust the thermostat to
proper temperature. Close the trigger gun and turn
burner switch ON.
IMPORTANT: The throttle control must be in the full
throttle position or damage to the AC generator or
burner may result.
9. Open the trigger gun. The burner will fire immediately
with a puff of smoke. If smoke continues, refer to the
Troubleshooting Guide in this manual. When the trig-
ger gun is closed or the temperature setting is
reached, the burner will automatically turn off.
To Clean
1. Insert the detergent inlet line into the container of
mixed detergent. The detergent metering valve can
be opened gradually to meter the desired amount of
detergent. The flow may be observed through the clear
detergent line. Allow detergent to reach the end of
wand before proceeding.
Pressure Nozzle
Figure 8 - Nozzle Installation/Manual Trigger Lock
Manual Trigger Lock
6. If detergents are to be used, only use detergent for
pressure washers. Follow instructions on detergent
container.
IMPORTANT: Before installing the pressure nozzle
on initial start-up, turn on the water supply and allow
water to run from the end of the wand until clear to
prevent the pressure nozzle from clogging.
IMPORTANT: If the pressure washer has not been
used for an extended period of time, remove the pres-
sure nozzle from the end of the wand and turn on the
water supply. Allow water to run from the end of the
wand until clear.
7. Install the proper pressure nozzle for your cleaning
needs on end of wand, refer to
Figure 8.
IMPORTANT: The trigger gun provided with this pres-
sure washer is equipped with a manual trigger lock
to prevent accidental operation of the trigger gun,
refer to Figure 8. The manual trigger lock should be
used whenever the trigger gun is not in use.
Fuel Pump
The model 5645 is equipped with an electric fuel pump
which operates only when the engine is running. The
pump is primed when the key switch is held in the start
position. In the event that the engine stalls for any reason
the fuel pump will shut off.
WARNING: The fuel pump installed on this machine
has been adjusted at the factory to provide a maxi-
mum pressure of 1.3-1.7 PSI at the pump outlet. When-
ever the fuel pump is replaced the new pump must
be adjusted using the following procedure:
1. Place the ignition switch in the OFF position.
2. Disconnect the fuel line from the engine mounted fuel
filter and connect a fuel pump pressure gauge (0-5
PSI) to the fuel pump discharge line.
3. Turn the ignition key to the start position and
observe pressure gauge. Pressure must be set to
between 1.3 and 1.7 PSI. It will be necessary to bleed
off accumulated pressure in line prior to each gauge
reading. Turn screw on top of fuel pump to adjust pres-
sure (CCW to decrease, CW to increase).
4. After adjustment, reconnect fuel line to engine
mounted fuel filter and start machine. Check for fuel
leakage and tighten fittings/clamps as required.
