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English (Original Instructions)

Thank you for buying a Ryobi chainsaw.
Your chainsaw has been engineered and manufactured to 

Ryobi’s high standard for dependability, ease of operation, 

and operator safety. Properly cared for, it will give you 

years of rugged, trouble-free performance.
Some regions have regulations that restrict the use of 

the product to some operations. Check with your local 

authority for advice.

READ ALL INSTRUCTIONS
Intended use

This chainsaw is designed for cutting branches, trunks, 

logs and beams of a diameter determined by the cutting 

length of the guide bar. It is only designed to cut wood. It 

is only to be used outdoors, by adults.
Do not use the chainsaw for any purpose not listed above. 

This chainsaw is not to be used for professional tree 

services. It is not to be used by children or by persons 

not wearing adequate personal protective equipment and 

clothing.

Residual risks

Even when using the chainsaw as intended, there remains 

a residual risk of harm which cannot be fully prevented. 

The following list of potential hazards should be read and 

understood. You should pay extra attention and care to 

these items to reduce the risk of occurrence or injury.

 

Contact with exposed cutting teeth and saw chain.

 

Access to rotating parts (the saw chain).

 

Unexpected, abrupt movement (kick back) of the 

guide bar.

 

Flying chain parts (thrown off or broken).

 

Flying material (cut from the work piece).

 

Inhalation of saw dust and particles or emissions from 

the petrol engine.

 

Skin contact with petrol/oil.

 

Loss of hearing if no hearing protective equipment 

worn during use.

GENERAL SAFETY RULES

 WARNING

The warnings, labels, and instructions found in this 

section of the operator’s manual are for your safety. 

Failure to follow all instructions may result in serious 

personal injury. Safe operation of this tool requires that 

you read and understand this operator’s manual and 

all labels affixed to the tool. Safety is a combination of 

using common sense, staying alert, and knowing how 

your saw works.

 

Do not operate a chainsaw that is damaged, improperly 

adjusted, or not completely and securely assembled. 

Be sure that the saw chain stops moving when the 

throttle control trigger is released.

GENERAL PRECAUTIONS

 

Know your tool. Read the operator’s manual carefully. 

Learn the saw’s applications and limitations as well as 

the specific potential hazards related to this tool.

 

Do not operate a chainsaw with one hand. Serious 

injury to the operator, helpers, and/or bystanders 

may result from one-handed operation. A chainsaw is 

intended for two-handed use.

 

Do not operate a chainsaw when you are fatigued. 

Never operate a chainsaw when you are tired or under 

the influence of medication, drugs, or alcohol.

 

Keep all parts of your body away from the saw chain 

when the engine is running.

 

Always carry the chainsaw with the engine stopped 

and the brake engaged, the guide bar and saw chain 

to the rear, and the silencer away from your body. 

When transporting the chainsaw, use the appropriate 

guide bar scabbard.

 

Turn off the engine before putting the chainsaw down. 

Do not leave the engine running unattended. As an 

additional safety precaution, apply the chain brake 

before putting down the saw.

 

Do not cut vines and/or small undergrowth (less than 

76 mm (3 inch) in diameter).

 

Silencer surfaces are very hot during and after 

operation of the chainsaw; keep all body parts away 

from the silencer. Serious burns may occur if contact 

is made with the silencer.

 

Always hold the chainsaw with both hands when the 

engine is running. Use a firm grip with thumbs and 

fingers encircling the chainsaw handles.

 

Never let anyone use your chainsaw who has not 

received adequate instructions in its proper use. This 

applies to rentals as well as privately owned saws.

 

Before you start the engine, make sure the saw chain 

is not contacting any object.

 

Operate the chainsaw only in well ventilated areas.

 

Always have a fire extinguisher available when using 

chainsaw.

 

Use guide bar cover during transport and storage.

 

The chainsaw should always be used with correctly 

mounted spiked bumper.

 

Do not adapt your powerhead to a bow guide or use 

it to power any attachments or devices not listed for 

your saw.

PROPER CLOTHING FOR SAFETY

 

Clothing must be sturdy and snug-fitting but allow 

complete freedom of movement. Always wear long 

pants made of heavy material to help protect your 

legs from contact with branches and brush. To reduce 

Summary of Contents for RCS4640N

Page 1: ...RCS4640N PETROL CHAINSAW Important It is essential that you read the instructions in this manual before assembling maintaining and operating this machine...

Page 2: ...assembled Be sure that the saw chain stops moving when the throttle control trigger is released GENERAL PRECAUTIONS Know your tool Read the operator s manual carefully Learn the saw s applications an...

Page 3: ...g protection reduces the ability to hear warnings shouts or alarms The operator must pay extra attention to what is going on in the work area Keep bystanders and animals out of the work area Do not al...

Page 4: ...Symptoms include episodic blanching of fingers in response to cold numbness and tingling In extreme cases it will cause loss of touch sensation Anti vibration system does not guarantee that you will...

Page 5: ...and bar lubricant to the chain and bar oil reservoir every time you add fuel to the chain saw fuel tank Mix fuel outdoors where there are no sparkles or flames Do not smoke when mixing fuel or filling...

Page 6: ...ngth 375 mm Chain pitch 8 26 mm 0 325 Chain gauge 1 27 mm 0 05 Chain type 0 325 low profile full complement Drive sprocket 7 teeth x 0 325 Engine displacement 46 cm3 Maximum engine power ISO 7293 1 8...

Page 7: ...WARNING Kick back occurs when the moving chain contacts an object at the upper portion of the tip of the guide bar or when the wood closes in and pinches the saw chain in the cut Contact at the upper...

Page 8: ...nt only Mix 2 lubricant into the petrol This is a 50 1 ratio Mix the fuel thoroughly and also each time before refuelling Mix in small quantities Do not mix quantities larger than usable in a 30 day p...

Page 9: ...t do not attempt to start in the full choke position skip step 5 Push and release primer bulb 10 times Pull the choke out and push it back to the original run position STOPPING THE ENGINE See figure 1...

Page 10: ...trigger as soon as the cut is completed allowing the engine to idle Running the saw at full throttle without a cutting load may result in unnecessary wear to the chain bar and engine 7 Do not put pres...

Page 11: ...quipment Do not cut down trees having an extreme lean or large trees with rotten or dead limbs loose bark or hollow trunks Have these trees pushed or dragged down with heavy equipment then cut them up...

Page 12: ...operations stand on the uphill side so that the cut off section of the log cannot roll over you Sometimes it is impossible to avoid pinching with just standard cutting techniques or difficult to predi...

Page 13: ...he cutters should face in the direction of chain rotation If they face backwards turn the loop over 7 Place the chain drive links into the bar groove 8 Position the chain so there is a loop at the bac...

Page 14: ...e A Too low increases the potential for kick back Not low enough decreases cutting ability If the cutter teeth hit hard objects such as nails and stones or are abraded by mud or sand on the wood have...

Page 15: ...any of the following faults should be replaced Wear inside the bar rails which permits the chain to lie over sideways Bent guide bar Cracked or broken rails Spread rails In addition lubricate guide b...

Page 16: ...will seriously damage the engine WARNING Silencer surfaces are very hot during and after operation of the chainsaw Keep all body parts away from the silencer Serious burns may occur if contact is made...

Page 17: ...or damaged parts Before each use For loose fasteners Before each use For loose parts Before each use Chain brake function Before each use For fuel leaks Before each use Inspect and Clean Bar Before ea...

Page 18: ...carburettor adjustment Engine starts but will not run properly at high speed Carburettor requires H High jet adjustment Contact a service dealer for carburettor adjustment Engine does not reach full s...

Page 19: ...cant is on the guide bar contact a service dealer Bar and chain running hot and smoking Chain brake engaged Release chain brake refer to Operation operating chain brake earlier in this manual Chain te...

Page 20: ...tronic Industries Australia Pty Ltd Level 1 660 Doncaster Road Doncaster VIC 3108 Australia Techtronic Industries New Zealand Ltd 18 26 Amelia Earhart Avenue Mangere Auckland 2022 New Zealand 96099401...

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