OREC AHRC 663 Operating Instructions Manual page 14

(5) Cutting height adjustment lever
This lever adjusts the height at which weeds and brush are cut.
Turn the lever to the right to lower the cutting height and turn the lever left to raise the cutting height.
When working on uneven ground, adjust the cutting height so that the blades do not cut into mud or rocks.
 Raise the cutting height immediately if you experience any of the following.
-An increase in flying debris such as rocks.
Cutting into mud, thrown mud is stuck to the inside of the blade cover and the ejection of
cut weeds, etc, is getting worse, resulting in a wasteful loss of power output.
-Wear and tear of the blades occurs extremely quickly. Blades may break soon.
(6) Front wheels
The front wheels run freely, enabling smooth steering on level ground.
(7) Handlebar up/down lever
Adjust the height of the handlebars in accordance with the operator's size or the type of work being performed.
Please adjust the handlebar position to the height of the operator's hips.
(8) Front flappers
The front flappers automatically open and close according to the quantity of weeds. Always operate with the
front flapper in a free state. Do not operate with the front flappers in the raised position.
(9) Engine stop switch
Switches the engine power (ON)/(OFF).
(10) Steering clutch lever
Grip the left clutch lever to turn left and grip the right clutch lever to turn right.
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