Ryobi 790r Manuel de l'opérateur télécharger pdf (Page 19)

TIPS FOR BEST TRIMMING RESULTS

• Keep the cutting attachment parallel to the

ground.

• Do not force the cutting attachment. Allow

the tip of the line to do the cutting, especially

along walls. Cutting with more than the tip

will reduce cutting efficiency and may

overload the engine.

• Cut grass over 8 in. (200 mm.) by working

from top to bottom in small increments to

avoid premature line wear or engine drag.

• Cut from left to right whenever possible.

Cutting to the right improves the unit's

cutting efficiency. Clippings are thrown away

from the operator.

• Slowly move the trimmer into and out of the

cutting area at the desired height. Move

either in a forward-backward or side-to-side

motion. Cutting shorter lengths produces the

best results.

• Trim only when grass and weeds are dry.

• The life of your cutting line is dependent

upon;

• Following the previous trimming

techniques

• What vegetation is being cut

• Where it’s being cut

For example, the line will wear faster when

trimming against a foundation wall as opposed

to trimming around a tree.

DECORATIVE TRIMMING

Decorative trimming is accomplished by

removing all vegetation around trees, posts,

fences, etc.

Rotate the whole unit so that the cutting

attachment is at a 30° angle to the ground

(Fig. 26).

OPERATING INSTRUCTIONS

19

USING THE CUTTING BLADE

WARNING: Always wear eye,

hearing, foot, body protection and

the strap to reduce the risk of injury

when operating this unit.

Before operating the unit with the cutting blade

stand in the operating position (Figs. 27). Refer

to Holding the Trimmer, Pg. 18.

Fig. 26

Fig. 27

Cutting Blade Operating Tips:

To establish a rhythmic cutting procedure:

• Plant feet firmly, comfortably apart.

• Bring the engine to full throttle before

entering the material to be cut. The blade

has maximum cutting power at full throttle

and is less likely to bind, stall, or cause blade

thrust, which can result in serious personal

injury to the operator or others.

WARNING:

Blade thrust may occur

when the spinning blade contacts an

object that it does not immediately

cut. Blade thrust can be violent

enough to cause the unit and/or

operator to be propelled in any

direction, and possibly lose control of

the unit. Blade thrust can occur

without warning if the blade snags,

stalls or binds. This is more likely to

occur in areas where it is difficult to

see the material being cut.

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