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Trimming operation

Basic trimming operation with metal blade

Scything weeds

This is cutting by swinging the cutting attachment in a level 
arc. It can quickly clear areas of field grass and weeds. Scyth-
ing should not be used to cut large, tough weeds or woody 
growths.

If a sapling or shrub binds the cutting attachment, do not use 
the cutting attachment as a lever to free the bind, because this 
will cause cutting attachment failure.

Instead, shut off the engine and push the sapling or shrub to 
free the blades.

 WARNING

Please observe the following instructions when trimming.

Check to ensure that the trimmer blade has been tightened securely in place.

Replace the shield if it is damaged or cracked.

Replace the trimmer blade nut when it becomes worn.

Do not cut into the ground with the blade.

Do not operate with a dull, bent, fractured or discoloured blade and worn or damaged nut.

Do not run engine at full throttle without a load.

Failure to do so could lead to an accident or serious injury.

Use only cutting attachments recommended by YAMABIKO Corporation. YAMABIKO Corporation will not be respon-
sible for the failure of cutting devices, attachments or accessories which have not been tested and approved by 
YAMABIKO Corporation for use with this unit.

The type of blade used must be matched to the type and size of material cut. An improper or dull blade can cause 
serious personal injury. Blades must be sharp. Dull blades increase the chance of kick-out and injury to yourself and 
bystanders.

Plastic/Nylon Grass/Weed Blades may be used where ever the nylon line head is used. Do not use this blade for 
heavy weeds or brush.

The 3 cutter blade is designed especially to cut weeds and grass. To avoid injury due to kickback or blade fracture, 
do not use the 3 cutter blade to cut brush or trees.

8 Tooth Weed/Grass Blade is designed for grass, garden debris and thick weeds. Do not use this blade for brush 
or heavy woody growth, 19 mm diameter or larger.

22 Tooth Clearing Blade is designed for dense thickets and saplings up to 64 mm diameter.

80 Tooth Brush Blade is designed for cutting brush and woody growth up to 13 mm diameter.

Damaged or shattered blades can cause accidents and serious injury.

Kickback

The phenomenon that occurs if the trimmer blade comes into 
contact with a tree, post, rock or other hard object while ro-
tating at high speed and reacts by recoiling powerfully and 
instantaneously is known as kickback.

Causing kickback can result in a loss of control over the 
product and is highly dangerous.

In particular, if the front-right quadrant of the trimmer blade 
(B) strikes a shrub or other such object, the trimmer blade 
will cause the product to recoil sharply backwards to the 
right.

To prevent kickback, do not trim from left to right. Be careful to ensure that the trimmer blade does not strike any 
hard objects.

When trimming, ensure that the object you are cutting meets the portion of the blade 1/3 in from the front edge on 
the left-hand side (A).

Failure to do so could cause an injury or fatal accident.

Summary of Contents for SRM-4510

Page 1: ...1Cover ENGLISH OPERATOR S MANUAL GRASS TRIMMER BRUSHCUTTER SRM 4510 WARNING READ THE INSTRUCTIONS CAREFULLY AND FOLLOW THE RULES FOR SAFE OPERATION FAILURE TO DO SO COULD RESULT IN SERIOUS INJURY EN...

Page 2: ...12 Preparing the fuel 12 Engine operation 14 Starting the engine 14 Stopping the engine 15 Trimming operation 16 Using shoulder harness 17 Basic trimming operation with nylon line cutting head 17 Bas...

Page 3: ...the product You must not modify the product To do so could lead to an accident or serious injury Any malfunction resulting from a modification to the product will not be covered by the manufacturer s...

Page 4: ...the repetitive movement Do exercises to strengthen hand and arm muscles See a doctor if you feel tingling numbness or pain in your fingers hands wrists or arms The sooner RSI is diag nosed the more l...

Page 5: ...fire or smoke If fire comes from the engine or smoke appears from any area other than the exhaust vent first distance yourself from the product to ensure your physical safety Use a shovel to throw sa...

Page 6: ...protection and gloves Petrol and oil mixture Emergency stop Choke Control Cold Start Position Choke Closed Warning Thrown objects Choke Control Run Position Choke Open Warning side thrust Carburettor...

Page 7: ...tand what the decal means before using your product If the decal becomes unreadable due to wear and tear or damage or peels off and is lost please purchase a replacement decal from your dealer and att...

Page 8: ...ked 7 Ignition switch Slide switch mounted on top of the throttle trigger housing move switch forward to RUN backward to STOP position 8 Throttle trigger Activated by the operator s finger for control...

Page 9: ...ng or broken Engine Operation Shaft Handle 1 Throttle lever 2 Engine 3 Operator s manual 4 Safety goggles 5 Caution tag 6 Shaft tube 7 Locking tool 8 Socket wrench 9 L wrenches 10 Spanner 11 Bolts 12...

Page 10: ...the slot D for rotation prevention 3 Locate the throttle grip so that the screw can pass through the stopper hole E 4 Securely tighten the screw and nut 1 Loosen handle bar support bolts A 2 Locate ha...

Page 11: ...ut could be broken 7 Remove locking tool WARNING Wear heavy duty gloves when working with the trimmer blade When replacing the trimmer blade during a trimming task ensure that the engine is switched o...

Page 12: ...Balancing and levelling as above may require relocation of the clamp and readjustment of the harness straps Also each type of cutting attachment and shield mounted on the unit may require balancing Pr...

Page 13: ...e Always loosen fuel caps slowly allowing pressure to equalize Otherwise fuel may get spewed Mop up any fuel that overflows or spills out due to overfilling Fuel spills can cause fire and burns when i...

Page 14: ...if there are abnormal vibrations or sounds Contact your dealer to have it repaired Accidents involving parts that fall or shatter off can cause wounds or serious injury The exhaust fumes from the eng...

Page 15: ...m engine 1 Move the ignition switch A to the Start position 2 Make sure that the throttle trigger D is at the idle speed po sition 3 Check that the choke lever is in the Run position 4 If no fuel is v...

Page 16: ...gn objects ricochet off the cutting attachment or wire and other materials twisted round the product spring off it In the following situations turn off the engine immediately and ensure that the cutti...

Page 17: ...feed only up to the wire If you go too far the line will snap off around the wire Trimming can be done to cut through weed stems one at a time Place the nylon line cutting head near the bottom of the...

Page 18: ...the shield See appropriate pic ture This results in the debris being thrown away from you Tilting the head to the wrong side will shoot the debris toward you If the nylon line cutting head is held fla...

Page 19: ...rp Dull blades increase the chance of kick out and injury to yourself and bystanders Plastic Nylon Grass Weed Blades may be used where ever the nylon line head is used Do not use this blade for heavy...

Page 20: ...arts and consumables please use only genuine parts and designated products and components Using parts from other manufacturers or non designated components may result in a malfunction Area Maintenance...

Page 21: ...allow it to idle 2 3 minutes until warm 2 If the attachment moves when the engine is at idle reduce the idle speed by turning the idle adjustment screw T coun ter clockwise 3 Repeat the process of acc...

Page 22: ...equest your dealer to inspect or replace NOTE When the carburettor cannot be adjusted properly with the idle speed adjustment screw T you must contact an authorized service dealer IMPORTANT To maintai...

Page 23: ...kgf cm to 170 kgf cm The spark test for checking whether the spark plug is spark ing must be carried out by your dealer Angle transmission 1 Remove the plug A and drain screw B from the angle transmis...

Page 24: ...k plug is dirty or damp 1 Fuel degradation 2 Incorrect electrode gap 3 Carbon deposits 4 Electrical fault 1 Replace 2 Adjust or replace 3 Clean or replace 4 Consult your dealer Engine starts but no ac...

Page 25: ...te quantity around 10 mL of clean new 2 stroke engine oil to the cyl inder via the spark plug hole 9 Place a piece of clean cloth over the spark plug hole 10 Pull 2 or 3 times on the starter grip to d...

Page 26: ...1 part 2 Cutting attachment option Blade centre hole diameter Thread 25 4 mm Left handed thread M12 1 75 pitch Gear Case Gear ratio and lubrication Rotational direction of output shaft viewed from ab...

Page 27: ...27 1Notes and rear cover MEMORANDUM...

Page 28: ...X750226 7100 2019 1 7 2 Suehirocho Ohme Tokyo 198 8760 JAPAN PHONE 81 428 32 6118 FAX 81 428 32 6145...

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