Ryobi 766r Operator'S Manual Download Page 14

OPERATING INSTRUCTIONS

14

TIPS FOR BEST TRIMMING RESULTS

The correct angle for the cutting attachment
is 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 right to left whenever possible.
Cutting to the left 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. 

Fig. 12

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. 12).

MAINTENANCE AND REPAIR INSTRUCTIONS

NOTE:

Some maintenance procedures may
require special tools or skills. If you
are unsure about these procedures
take your unit to an authorized service
dealer. 

MAINTENANCE SCHEDULE

These required maintenance procedures should
be performed at the frequency stated in the
table. They should also be included as part of
any seasonal tune-up.

WARNING: 

Never do maintenance

or repairs with unit running. Always
do maintenance and repairs on a
cool unit. Disconnect spark plug wire
to ensure the unit will not start.

FREQUENCY

MAINTENANCE REQUIRED

REFER TO:

Before Starting Engine

Fill fuel tank with correct oil and fuel mixture.

Page 11

Every 10 Hours

Clean and re-oil air filter.

Page 18

Every 50 Hours

Check spark plug condition and gap.

Page 20

Summary of Contents for 766r

Page 1: ...FOR QUESTIONS CALL 1 800 345 8746 in U S or 1 800 265 6778 in CANADA www ryobi com IMPORTANT MANUAL DO NOT THROW AWAY OPERATOR S MANUAL 2 Cycle Gas Trimmer 766r...

Page 2: ...ating this equipment THIS PRODUCT IS COVERED BY ONE OR MORE OF THE US PATENTS LISTED BELOW 5 076 149 4 901 682 4 779 405 4 651 422 4 505 040 4 463 498 4 369 742 4 342 236 4 223 441 2 125 688 D 249 012...

Page 3: ...ory equipped with a spark arrestor If these items are required in your area ask your LOCAL SERVICE dealer to install the Optional Accessory Part 180030 Spark Arrestor Kit FOR QUESTIONS CALL 1 800 345...

Page 4: ...maged in any way Make sure the cutting attachment is properly installed and securely fastened Be sure the cutting attachment shield is properly attached and positioned as recommended Failure to so can...

Page 5: ...just the D handle to your size to provide the best grip Be sure the cutting attachment is not in contact with anything before starting the unit Use the unit only in daylight or good artificial light A...

Page 6: ...ional symbols and pictographs that may appear on this product Read the operator s manual for complete safety assembly operating and maintenance and repair information WARNING READ OPERATOR S MANUAL Re...

Page 7: ...here is a sharp blade on the cutting attachment shield To prevent serious injury do not touch blade CHOKE CONTROL A FULL CHOKE position B PARTIAL CHOKE position C RUN position INDICATES OIL Refer to o...

Page 8: ...nd light weeds Decorative trimming around trees fences etc Primer Bulb Air filter Muffler Cover Fuel Cap Throttle Control Power Head Choke Lever D handle Line Cutting Blade Cutting Attachment Shaft Ho...

Page 9: ...right Bolt Grip Wing Nut Washer Fig 3 Fig 1 Fig 2 2 Insert the shoulder bolt into the squared hole in the handle Place the washer on the bolt and screw the wing nut onto the bolt 3 Rotate the D handle...

Page 10: ...shield with the holes in the cutting attachment Fig 4 Cutting Attachment Shield Shaft Housing Hex Lock Nut Fig 4 Fig 5 Cutting Attachment Shield Cutting Attachment 2 Place a hex lock nut into one of...

Page 11: ...g Blended Fuels If you choose to use a blended fuel or its use is unavoidable follow recommended precautions Always use fresh fuel mix per your operator s manual Use the fuel additive STA BIL or an eq...

Page 12: ...by idling 2 Put the On Off Stop Control in the OFF position Fig 7 STARTING INSTRUCTIONS WARNING Avoid accidental starting Be in the starting position when pulling the starter rope Fig 9 The operator...

Page 13: ...ng the line into objects such as walls or fence posts ADJUSTING TRIMMING LINE LENGTH The Bump Head cutting attachment allows you to release trimming line without stopping the engine To release more li...

Page 14: ...eing 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 Fig 12 DECORATIVE TRIMMING Decorative trimming is accom...

Page 15: ...he bolt inside the Bump Knob to make sure it will move freely Replace if damaged NOTE A Bump Knob Part 153066 can be purchased from your local authorized dealer 4 Use a clean cloth to clean the the in...

Page 16: ...er between the two lines to stop the lines from overlapping Do not overlap the ends of the line NOTE Failure to wind the line in the direction indicated will cause the cutting head to operate incorrec...

Page 17: ...ig 14 Pg 15 Push the inner reel and outer spool together While holding the inner reel and outer spool grasp the ends and pull firmly to release the line from the holding slots in the spool 7 Hold the...

Page 18: ...Apply enough clean SAE 30 oil to lightly coat the filter Fig 24 5 Squeeze the filter to spread and remove excess oil Fig 25 Air Filter 3 Wash the filter in detergent and water Fig 23 Rinse the filter...

Page 19: ...The cutting attachment will be spinning during idle speed adjustments Wear protective clothing and observe all safety instructions to prevent serious personal injury If after checking the fuel mixtur...

Page 20: ...cracked fouled or dirty spark plug Set the air gap at 0 020 in 0 5 mm using a feeler gauge Fig 27 CAUTION Do not sand blast scrape or clean electrodes Grit in the engine could damage the cylinder 4 In...

Page 21: ...re the unit out of the reach of children LONG TERM STORAGE If the unit will be stored for an extended time use the following storage procedure 1 Drain all fuel from the fuel tank and drain into a cont...

Page 22: ...switch to ON Fill fuel tank Press primer bulb fully and slowly 5 7 times Use starting procedure with choke lever in the RUN position Pg 12 Drain fuel tank Add fresh fuel mixture Replace or clean the...

Page 23: ...uretor Diaphragm All Position Starter Auto Rewind Muffler Baffled with Guard Throttle Manual Spring Return Fuel Tank Capacity 18 oz 530 ml Fuel Tank HD Polyethylene DRIVE SHAFT STRING HEAD Drive Shaft...

Page 24: ...NOTES 24...

Page 25: ...he engine or equipment is delivered to the retail purchaser The manufacturer warrants to the initial owner and each subsequent purchaser that the engine is free from defects in material and workmanshi...

Page 26: ...tion this warranty does not cover A Tune ups Spark Plugs Carburetor Adjustments Filters B Wear items Bump Knobs Outer Spools Cutting Line Inner Reels Starter Pulley Starter Ropes Drive Belts RYOBI res...

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