4
6.Open the fuel valve.
7.Set the choke lever on the carburettor to the C (closed) position. In hot climates, it may only be necessary to set the choke to
8.Set the throttle lever (on the
9.Ensure that the sprayhead is in a safe place away from foliage or obstructions.
10.Start the engine by pulling on the starter cord. DO NOT pull the cord hard against its
i)Open the choke by moving the lever to the A position.
ii)Close the throttle.
iii)Pull on the starter cord 10 – 20 times.
iv)Wait several minutes and repeat steps 7 – 10.
11.Set the choke lever to the A position.
12.Set the throttle lever so that the engine idles smoothly.
13.Lift the knapsack mistblower onto the operator's back. Note that the operator must hold the sprayhead and NOT let it drag on the ground. This operation is easiest with two people. However, the operator can put the knapsack on alone if it is first lifted onto a
14.When in the spraying area, set the throttle lever to its maximum position. DO NOT run the engine for a prolonged time at
15.Turn the flow of chemical on and off with the valve on the handle. The lever of this valve may either be pressed down against its spring for intermittent operation or may be raised to a locked position for continuous spraying.
16.Only open the chemical valve when the mistblower is running at its normal operating speed. Opening the valve when there is no airflow can result in a
17.The sprayer must always be directed DOWNWIND of the operator and each pass through the sprayed area must be UPWIND of previous passes. This ensures that the operator is always walking through an unsprayed area and cannot be contaminated by any spray blown back by the wind.
18.The sprayer should be held at a distance of at least 1m (3 ft) from the target whenever possible. This ensures an even distribution of spray droplets and minimises the risk of damage to vulnerable crops by high velocity air from the sprayhead.
19.The rotating gauze of the atomiser should not be allowed to come into contact with foliage or the operator.
20.When using a ULV drift spraying technique to give a wide swath in open terrain (e.g. locust or armyworm control), the sprayhead should be held at an angle of about 30 degrees above the horizontal. This allows the wind to carry the spray from the maximum height to achieve the widest swath.