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English (Original Instructions)

WARNING:

All chainsaw service, other than the items in 

the operator’s manual maintenance instructions, 

should be performed by competent chainsaw 

service personnel. If improper tools are used to 

remove the flywheel or clutch, or if an improper 

tool is used to hold the flywheel in order to 

remove the clutch, structural damage to the 

flywheel could occur which could subsequently 

cause the flywheel to burst and serious injury 

could result.

KICK-BACK

 

Kick-back may occur when the nose of the guide bar 

touches an object or when the wood closes in and 

pinches the saw chain in the cut. The nose of guide 

bar contact in some cases may cause a lightning-fast 

reverse reaction kicking the guide bar up and back 

toward the operator. Pinching the saw chain along the 

top of the guide bar may push the guide bar rapidly 

back toward the operator. Either of these reactions 

may cause you to lose control of the saw, which could 

result in serious injury. Do not rely exclusively upon 

the safety devices built into your saw. As a chainsaw 

user, you should take several steps to keep your 

cutting jobs free from accident or injury.

 

With a basic understanding of kick-back, you can 

reduce or eliminate the element of surprise. Sudden 

surprise contributes to accidents.

 

Keep a good firm grip on the saw with both hands 

when the engine is running. Place your right hand on 

the rear handle and your left hand on the front handle 

with your thumbs and fingers encircling the chainsaw 

handles. A firm grip together with a stiff left arm will 

help you maintain control of the saw if kick-back 

occurs.

 

Make sure that the area in which you are cutting is free 

from obstructions. Do not let the nose of the guide bar 

contact a log, branch, fence, or any other obstruction 

that could be hit while you are operating the saw.

 

Cut at high engine speeds. Always cut with the engine 

running at full speed. Fully squeeze the throttle trigger 

and maintain a steady cutting speed.

 

Do not overreach or cut above chest 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” in this manual for information 

on kick-back and how to avoid serious personal injury.

WHITE FINGER RISKS

Prolonged use of chainsaws expose operators to harmful 

vibration  that  may  lead  to  white  finger  risks.  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 

not  suffer  white  finger  risks.  Operators  should  observe 

their  hands  and  fingers.  If  the  above  symptoms  occur, 

operators should seek medical advice immediately.
When operating the unit wear gloves to keep the hands 

and wrists warm.

SERVICE

Servicing requires extreme care and knowledge 

and should be performed only by a qualified service 

technician. For service we suggest you return the product 

to your nearest authorised service center for repair. When 

servicing, use only identical replacement parts.

WARNING:

To avoid serious personal injury, do not attempt

to use this product until you read thoroughly and 

understand completely the operator’s manual. 

If you do not understand the warnings and 

instructions in the operator’s manual, do not 

use this product. Call Ryobi customer service for 

assistance.

WARNING:

The operation of any power tool can result in 

foreign objects being thrown into your eyes, 

which can result in severe eye damage. 

Before beginning power tool operation, always 

wear safety goggles, safety glasses with side 

shields, or a full face shield when needed. We 

recommend Wide Vision Safety Mask for use 

over eyeglasses or standard safety glasses with 

side shields. Always use eye protection which is 

marked to comply with EN 166.

WARNING:

Long term inhalation of the engine's exhaust 

fumes, chain oil mist and sawdust can result in 

serious personal injury.

WARNING:

Injuries may be caused, or aggravated, by 

prolonged use of a tool. When using any tool 

for prolonged periods, ensure you take regular 

breaks.

SAVE THESE INSTRUCTIONS AND PASS THEM ON 

IF THE SAW IS TO BE USED BY ANOTHER PERSON

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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