Joyner JNSZ1600QL Owner's Manual page 84

(3) Start engine and keep idling., warm engine to normal working temperature and stop engine cooling
down.
(4) Drain water
(5) Repeat step (2)—(4) until the water drained is the same as clean water.
(6) If the previous coolant application and replacement is not to specification, do some cleaning as the
following method:
a. Drain coolant
b. Remove outlet hose of radiator. Insert the water supply hose into the inlet of radiator until the water
drained is clean.
c. Connect the hose connected to water supply to the water outlet of thermostat seat to wash the engine
until the water drained from the water pump inlet is clean.
d. If radiator is too dirty, it may be washed from the reverse direction. Connect the hose connected to the
water supply to the water outlet of thermostat seat to wash the engine until the water coming out from the
water pump inlet is clean.
——Add coolant
(1) Before adding coolant, check if the drain plug of radiator is closed and if the pipeline is connected
and tight
(2) Remove the pressure cap and add coolant by the filler of expansion tank slowly. Since the
expansion tank is in the highest point of cooling system, with the coolant level raising, the air in the system
will be discharged into the expansion tank. Adding coolant slowly may discharge the air.
(3) Keep adding coolant until coolant level reaches the "maximum"line. Install the filler cover to avoid
coolant splashing.
(4) Start engine and keep idling. Warm engine to normal working temperature. Fan starts to run.
Observe the water thermometer and check if engine is overheated. If the coolant level of expansion tank
drops quickly, add coolant to the "maximum"line to reduce the air circulation in the system.
(5) Stop engine to cool engine completely (one night if possible). Remove pressure cap and check
coolant level, fill coolant to the "maximum"line.
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