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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. Do 

not operate this product when you are tired, ill or under 

the influence of alcohol, drugs or medication.

 

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.

Summary of Contents for RCS4235B Type III

Page 1: ...CHAINSAW ORIGINAL INSTRUCTIONS Important It is essential that you read the instructions in this manual before assembling maintaining and operating this machine RCS4235B Type III RCS4240B Type III...

Page 2: ...w 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 rel...

Page 3: ...chainsaw in a tree Beware of the emission of exhaust gases lubricant mist and saw dust This product is very noisy when operating to prevent long term hearing damage wear hearing protection and keep o...

Page 4: ...height Follow the manufacturer s sharpening and maintenance instructions for the saw chain Use only replacement bars and chains specified by the manufacturer or the equivalent NOTE Refer to Operation...

Page 5: ...ch 14 Ignition switch in the run position Figure 11 13 Primer bulb Figure 12 15 Choke lever 21 Start position 22 Run position Figure 13 2 Trigger release 3 Throttle trigger Figure 14 14 Ignition switc...

Page 6: ...tate clutch cover knob clockwise to secure 12 Clutch cover lock knob 11 Chain tensioning dial Figure 44 65 Loosen chain 66 Tighten chain Figure 46 67 Raker depth gauge clearance Figure 47 68 Inspect d...

Page 7: ...ating this equipment No smoking sparks or open flame Hold and operate the saw properly with both hands Do not operate the saw using only one hand Engines produce carbon monoxide which is an odorless d...

Page 8: ...eaded petrol intended for motor vehicle use with an octane rating of 91 R M 2 or higher Use 2 stroke oil for air cooled engines Mix the fuel mix thoroughly and also each time before refueling Turn ign...

Page 9: ...ar Rotation direction to loosen the guide bar The following signal words and meanings are intended to explain the levels of risk associated with this product SYMBOLS SIGNAL MEANING DANGER Indicates an...

Page 10: ...ndle located at or toward the front of the chain saw This handle is for the left hand Guide Bar A solid railed structure that supports and guides the saw chain Kickback The backward or upward motion o...

Page 11: ...0 05 inch Chain type 3 8 low profile full complement 3 8 low profile full complement Drive sprocket 6 teeth x 3 8 6 teeth x 3 8 Engine displacement 42 cm3 42 cm3 Maximum engine power ISO 7293 1 7 kW...

Page 12: ...h Oregon saw chain Model name RCS4235B Type III RCS4240B Type III Guide bar no silkscreen Carlton part number 14 10W N1 MHC 16 10W N156 MHC Chain Carlton part number N1C BL 52E N1C BL 56E Guide bar no...

Page 13: ...ain is very sharp Always wear protective gloves when performing maintenance on the chain n Stop the engine before setting the chain tension n Slightly loosen the clutch cover lock knob by pressing in...

Page 14: ...as knowledge of the project you are attempting Before use of this product familiarise yourself with all operating features and safety rules Bumper Spike The integral bumper spike see figure 1 may be u...

Page 15: ...s normal for the engine to emit smoke during and after the first use ADDING BAR AND CHAIN LUBRICANT See Figure 6 Use RYOBI Bar and Chain Lubricant It is designed for chains and chain oilers and is for...

Page 16: ...led all the way out to the START position the throttle is set for starting To reset the throttle to the RUN position squeeze and then release the throttle trigger To start a cold engine n Turn ignitio...

Page 17: ...learly BASIC OPERATING CUTTING PROCEDURES It is strongly suggested that you seek professional training in the safety and use of this tool Practice cutting a few small logs on a saw horse or cradle usi...

Page 18: ...all logs on a saw horse or another log while bucking n Keep a clear cutting area Make sure that no objects can contact the guide bar nose and chain during cutting this can cause Kickback Refer to Kick...

Page 19: ...stic parts Chemicals can damage weaken or destroy plastic which may result in serious personal injury LUBRICATION All of the bearings in this product are lubricated with a sufficient amount of high gr...

Page 20: ...re abraded by mud or sand on the wood have an authorised service centre sharpen the chain NOTE Inspect the drive sprocket for wear or damage when replacing the chain If signs of wear or damage are pre...

Page 21: ...rom impurities CLEANING THE AIR FILTER See Figures 58 59 n Activate the chain brake n Remove the two screws holding the Engine cover n Lift the front of the Engine cover past chain brake lever n Lift...

Page 22: ...6 This engine uses a Champion RCJ4 or RCJ6Y or NGK BPMR7A with 025 in electrode gap Use an exact replacement and replace every 50 hours or more frequently if necessary n Remove the spark plug lead by...

Page 23: ...Squeeze primer bulb several times to purge fuel from carburettor n Drain all bar and chain lubricant from tank into a container approved for lubricant n Always place the scabbard over the guide bar an...

Page 24: ...res L Low Jet adjustment Contact an authorised service centre for carburettor adjustment Engine starts but will not run properly at high speed Carburettor requires H High jet adjustment Contact an aut...

Page 25: ...may be dull or bar may be damaged If no lubricant is present contact an authorised service centre Engine starts and runs but chain is not rotating Chain brake is engaged Release chain brake Refer to...

Page 26: ...trade mark serial number markings have been defaced altered or removed any damage caused by non observance of the instruction manual any non CE product any product which has been attempted to be repai...

Page 27: ...tell Limited London Road Nottingham NG2 3HW Phone 0115 986 2161 Email service hentonandchattell com Garden Machines Northampton 66 70 Kingsthorpe Road NN2 6HD Northampton Phone 01604 716222 Email jack...

Page 28: ...006 42 EC is in conformity with the provisions of the following other EC Directives EMC Directive 2004 108 EC Noise Emission Directive 2000 14 EC amended by 2005 88 EC and Gas Emission Directive 97 68...

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