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The Shindaiwa H4 series of hand-held 

power equipment  is designed and built 

to deliver superior performance and 

reliability without compromise to quality, 

comfort, safety or durability.  Shindaiwa 

engines represent the leading edge of 

high-performance  engine technology, 

delivering exceptionally high power 

with remarkably low displacement and 

weight. As an owner/operator, you’ll soon 

discover for yourself why Shindaiwa is 

simply in a class by itself!

Warning and Operational Labels

Introduction

Throughout this manual are special 

“attention statements”.

Attention Statements

WARNING!

A statement preceded by  

the triangular attention symbol and  

the word “WARNING” contains 

information that should be acted upon 

to prevent serious bodily injury.

CAUTION!

A statement preceded by the word 

“CAUTION” contains information 

that should be acted upon to prevent 

mechanical damage.

IMPORTANT!

A statement preceded by the word 

“IMPORTANT” is one that possesses 

special significance.

NOTE:

A statement preceded by the word 

“NOTE” contains information that is 

handy to know and may make your job 

easier.

 

DANGER!

A statement preceded 

by the triangular attention symbol 

and the word “DANGER” contains 

information that should be acted 

upon to prevent serious injury or 

death.

Echo, Inc. reserves the right to make 

changes to products without prior notice, 

and without obligation to make alterations 

to units previously manufactured.

IMPORTANT!

The information contained in these 

instructions describes units available at 

the time of publication. 

Contents

PAGE

PAGE

IMPORTANT!

The operational procedures described in this manual are intended to help you get the most from this unit as well as to protect 

you and others from harm. These procedures are guidelines for safe operation under most conditions, and are not intended to 

replace any safety rules and/or laws that may be in force in your area. If you have questions regarding your H4 series hand-held 

power equipment, or if you do not understand something in this manual, contact Shindaiwa at the address printed on the back of 

this Manual.

WARNING!

The engine exhaust from 

this product contains chemicals 

known to the State of California to 

cause cancer, birth defects or other 

reproductive harm.

Read and follow this operator's 

manual. Failure to do so could 

result in serious injury.

Wear eye and hearing protection 

at all times during operation of this 

unit. Wear head protection where 

there is a risk of falling objects.

Beware of thrown or richocheted 

objects

Make sure no one is within 

15 m (50 feet) of an operating 

machine.

50 FEET

(15m

)

DO NOT operate this unit 

with a blade unless the unit 

is equipped with a Shindaiwa 

approved handlebar or barrier.

Always wear a harness when 

operating this unit with a blade. 

A harness is also recommended 

when using trimmer line.

If unit is used as a brushcutter, 

beware of blade thrust. A 

jammed blade can cause the 

unit to jerk suddenly and may 

cause the operator to lose 

control of the unit.

Safety ................................................... 3

Product Description .............................. 5

Specifications

 ....................................... 5

Emission Control .................................. 6

Assembly .............................................. 6

Mixing fuel ...........................................11

Filling the fuel tank.............................. 12

Starting the Engine  ............................ 13

Stopping the Engine ........................... 14

Checking Unit Condition ..................... 14

Operation ............................................ 14

Maintenance ....................................... 17

Long Term Storage ............................. 22

Troubleshooting Guide ....................... 23

Warranty ............................................. 26

Product Registration ........................... 29

Servicing Information .......................... 32

WARNING: 

Surface can be hot. 

Always wear gloves when handling 

this unit.

Summary of Contents for C344

Page 1: ...IWA OWNER S OPERATOR S MANUAL WARNING Minimize the risk of injury to yourself and others Readthismanualandfamiliarizeyourselfwiththecontents Always wear eye and hearing protection when operating this...

Page 2: ...this manual are intended to help you get the most from this unit as well as to protect you and others from harm These procedures are guidelines for safe operation under most conditions and are not in...

Page 3: ...jury if they are misused or abused Never allow a person without training or instruction to operate this unit Stay Alert You must be physically and mentally fit to operate this unit safely Safety WARNI...

Page 4: ...ing attachment parallel to the ground Always operate with both hands firmly gripping the unit Wear close fitting clothing to protect legs and arms Gloves offer added protection and are strongly recomm...

Page 5: ...g 15 8 lb Bore x Stroke 38 x 30 mm 1 49 x 1 18 in Displacement 34 cc 2 07 cu in Fuel Oil Ratio 50 1 Shindaiwa Red Armor ISO L EGD ISO CD 13738 and J A S O M345 FD two stroke air cooled engine oil Fuel...

Page 6: ...Cutting attachment shields Cutting Attachment Shoulder Strap w Hip Pad This unit comes fully assembled with the exception of the handlebar cutting attachment shield and cutting attachment Cutting att...

Page 7: ...ate D with notch in gear housing G and insert locking tool to prevent splined shaft from turning Arrow on gear housing flange points to notch location 2 Remove cotter pin A Left Hand thread blade nut...

Page 8: ...stic debris shield with cut off knife Using nylon line heads with metal debris shield can result in trimmer damage caused by operation with excessive line length To advance trimmer line NOTE To advanc...

Page 9: ...using 2 5 x 8 mm screws 2 5 mm nuts 2 5 mm lock washers bracket to shield 2 5 mm nuts 2 5 mm lock washers Bracket to Gear Housing 1 If installed remove nylon line head upper fixing plate shield plate...

Page 10: ...thread nut G Turn nut counterclockwise on PTO shaft to tighten 3 Align hole in adapter plate with notch in gear housing and insert Locking Tool A to prevent splined shaft from turning Arrow on gear ho...

Page 11: ...GD ISO CD 13738 and J A S O M345 FD certified oil will void the engine warranty Handling Fuel DANGER Fuel is VERY flammable Use extreme care when mixing storing or handling or serious personal injury...

Page 12: ...ammable material close to the engine muffler NEVER operate the engine without the muffler and spark arrester screen in place and in good working condition FUEL IS HIGHLY FLAMMABLE ALWAYS store gasolin...

Page 13: ...and pull recoil starter handle upward Hold the unit UPO Open After engine starts move choke to OPEN position Primer Bulb Return Tube Press primer bulb Close choke Set the choke lever to the CLOSED po...

Page 14: ...ing attachment replace it with a serviceable one Checking Unit Condition ALWAYS make sure the cutting attachment fits properly into the appropriate attachment holder If a properly installed attachment...

Page 15: ...e operator must stop the unit and add new lengths of trimmer line manually Flail This device designed for clearing weeds and light brush features three nylon blades attached to the head by pivots NOTE...

Page 16: ...odily contact with the blade ALWAYS KEEP THE HANDLEBAR OR BARRIER BAR SECURELY IN PLACE ON THE UNIT Brushcutter Shoulder Strap A shoulder strap provides additional protection against blade thrust In a...

Page 17: ...ICE CENTER AUTHORIZED BY ECHO INC THE USE OF PARTS THAT ARE NOT EQUIVALENT IN PERFORMANCE AND DURABILITY TO AUTHORIZED PARTS MAY IMPAIR THE EFFECTIVENESS OF THE EMISSION CONTROL SYSTEM AND MAY HAVE A...

Page 18: ...side face of the filter only CAUTION Never operate the unit if the air cleaner assembly is damaged or missing Prefilter Remove and inspect spark plug spark plug gap all models 0 6 mm 0 024 in Clean th...

Page 19: ...mited resistance 5 While holding the adjustment screw in place with the Allen driver tighten the locknut with a wrench 6 Turn engine over several times and return to TDC compression Recheck with prope...

Page 20: ...ldup 6 Reassemble the spark arrester muffler and engine cover in the reverse order of disassembly NOTE Every unit is run at the factory and the carburetor is set in compliance with emission regulation...

Page 21: ...NEVER rotate at engine idle If the idle speed cannot be adjusted by the procedure described here return the unit to your Shindaiwa dealer for inspection Idle Speed Adjustment 1 Place the unit on the g...

Page 22: ...ain all the fuel from the fuel tank IMPORTANT Stored fuel ages Do not mix more fuel than you expect to use in thirty 30 days ninety 90 days when a fuel stabilizer is added 1 Prime the primer bulb unti...

Page 23: ...lter and or vent Priming pump not functioning properly The ignition switch is in O OFF position Shorted ignition ground Faulty ignition unit If the plug is wet excess fuel may be in the cylinder The p...

Page 24: ...d oils at 50 1 gasoline oil ratio Clean repair or replace as necessary Consult with an authorized Shindaiwa servicing dealer Service the air cleaner element Tighten or replace the spark plug Check the...

Page 25: ...red Replace the spark plug Check the Specifications section for the correct plug and gap for your unit Restart Idle engine until cool Symptom Possible Cause Remedy Engine stops abruptly Engine difficu...

Page 26: ...or have questions concerning Shindaiwa s Warranty Statement you can contact our Consumer Product Support Department at 1 800 673 1558 or contact us through the web at WWW SHINDAIWA COM PRODUCT WARRAN...

Page 27: ...lined in the operator s manual is the customer s responsibility Failures due to improper set up pre delivery service or repair service by anyone other than authorized Shindaiwa servicing dealer during...

Page 28: ...28 NOTES...

Page 29: ...never be sold or misused by ECHO Inc Registering your purchase enables us to contact you in the unlikely event of a service update or product recall and verifies your ownership for warranty considera...

Page 30: ...30 NOTES...

Page 31: ...31 NOTES...

Page 32: ...call 1 877 986 7783 Dealer information is also available on WWW SHINDAIWA COM When presenting your unit for Warranty service repairs proof of purchase is required Consumer Product Support If you requ...

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