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20

carburetor

 

adjustment

Engine Break-In

New engines must be operated for a minimum duration of two tanks of 

fuel before carburetor adjustments can be made. During the break-in 

period your engine performance will increase and exhaust emissions 

will stabilize. Idle speed can be adjusted as required.

High Altitude Operation

 This engine has been factory adjusted to maintain satisfactory starting, 

emission, and durability performance up to 1,100 feet above sea level 

(ASL) (96.0 kPa). To maintain proper engine operation and emission 

compliance above 1,100 feet ASL the carburetor may need to be ad-

justed by an authorized ECHO service dealer.

IMPORTANT 

If the engine is adjusted for operation 

above

 1,100 feet ASL, the 

carburetor must be re-adjusted when operating the engine 

below

 

1,100 feet ASL, otherwise severe engine damage may result..

Level 2.

Tools required:

    Screwdriver, tachometer (Echo P/N 99051130017)

Parts required:

    None.

NOTE

  

Do not adjust carburetor unless necessary.  If you have difficulty, 

see your ECHO dealer.

Adjustment Screws

Idle Speed (A) 

Control throttle opening at idle.

Low (LO) Speed (B)  Controls amount of fuel at low speed and  

 

 

 

supplementary fuel for smooth progression from   

 

 

idle to high speed.

High (HI) Speed (C)  Controls amount of fuel at full throttle

Before Adjustment

Check that:

  •   

Air filter is clean and properly installed.

  •   

Spark arrestor screen and muffler are free of carbon.

  •   

Blower pipes are installed.

A

B

C

Summary of Contents for PB-620H

Page 1: ...s Manual MODEL PB 620H WARNING Read rules for safe operation and all instructions carefully ECHO provides this Operator s Manual which must be read and understood for proper and safe opera tion X75300...

Page 2: ...l Condition and Safety Equipment 3 Equipment Check 6 Emission Control 6 Description 7 Contents 9 Assembly 9 Install Blower Pipes 9 Operation 10 Fuel 10 Starting Cold Engine 12 Starting Warm Engine 13...

Page 3: ...nual safety symbols and important information Throughout this manual and on the product itself you will find safety alerts and helpful informational messages pre ceded by symbols or key words The foll...

Page 4: ...with cap or net Hot Humid Weather Heavy protective clothing can increase operator fatigue which may lead to heat stroke Schedule heavy work for early morning or late afternoon hours when temperatures...

Page 5: ...njuries It is believed that overusing the muscles and tendons of the fingers hands arms and shoulders may cause soreness swelling numbness weakness and extreme pain in those areas Certain repetitive h...

Page 6: ...rds and protective covers are properly assembled to unit NEVER reach into any opening while the engine is running Moving parts may not be visible through openings PRODUCT EMISSION DURABILITY EMISSION...

Page 7: ...ot be read a new one can be ordered from your ECHO dealer See PARTS ORDERING instructions for specific information Description Hot Decal near muffler P N X505002310 P N X505002080 General Warning Deca...

Page 8: ...Pumping purge bulb before starting engine draws fresh fuel from the fuel tank purging air from the carburetor Pump purge bulb until fuel is visible and flows freely in the clear fuel tank return line...

Page 9: ...lamps w screws Assembly WARNING Never perform maintenance or assembly procedures with engine running or serious personal injury may result install blower pipes stick handle 1 Assemble clamps A onto bo...

Page 10: ...it Blower housing may contain shredder blades and other sharp edges that can cause serious injuries if touched even if engine is off and blades are not moving Wear gloves to protect hands from sharp e...

Page 11: ...y allowing pressure to equalize NEVER refuel a unit when the engine is HOT or RUNNING DO NOT fill fuel tanks indoors ALWAYS fill fuel tanks outdoors over bare ground DO NOT overfill fuel tank Wipe up...

Page 12: ...ccupied building away from sparks and flames starting cold engine Recoil starter Use short pulls only 1 2 2 3 of rope length for start ing Do not allow the rope to snap back in Always hold the unit fi...

Page 13: ...t start after 5 pulls use cold start procedures A stopping engine 1 Throttle Lever Move throttle lever A to idle detent position and allow engine to return to idle before shutting off engine 2 Move th...

Page 14: ...eed may be necessary to clean grass and leaves from a lawn or flower bed 6 Higher speed may be necessary to move gravel dirt snow bottles or cans from a driveway street parking lot or stadium 7 Always...

Page 15: ...ired Level 2 Moderate difficulty Some specialized tools may be required ECHO offers REPOWERTM Maintenance Kits and Parts to make your maintenance job easier COMPONENT SYSTEM MAINTENANCE PROCEDURE REQ...

Page 16: ...or other damage Air filter element is saturated with dirt Air filter element is soaked with fuel mix 6 If air filter is in good condition and can be cleaned and reused lightly brush debris from air fi...

Page 17: ...fuel line and filter from the tank 3 Remove the filter from the line and install the new filter spark plug Level 1 Tools required 19 mm Spark Plug deep socket feeler gauge Parts Required REPOWERTM Tun...

Page 18: ...ld up insulates the engine and prevents the heat from leaving Removal of cooling passage blockages or cleaning of cooling fins is considered Normal Maintenance Any failure attributed to lack of mainte...

Page 19: ...n wrench Cross head screwdriver Wood or plastic scraper Parts Required As needed Heat Shield 1 Remove spark plug lead from spark plug and remove engine or muffler cover 5 screws 2 Place piston at top...

Page 20: ...uthorized ECHO service dealer Important If the engine is adjusted for operation above 1 100 feet ASL the carburetor must be re adjusted when operating the engine below 1 100 feet ASL otherwise severe...

Page 21: ...lean adjustment which can cause engine failure Do not exceed recommended HI speed engine R P M during operation or for long periods during adjust ment 1 Start engine run at idle for one minute 2 Compl...

Page 22: ...s e i d t u b t o n s e o d e t a r e l e c c a y l r e p o r p r e t l i f r i A y t r i d r e t l i f r i A r a e w l a m r o N e c a l p e r r o n a e l C r e t l i f l e u F y t r i d r e t l i f...

Page 23: ...exterior of unit 4 Perform all periodic lubrication and services that are required 5 Tighten all screws and nuts 6 Drain the fuel tank completely and pull the recoil starter handle several times to r...

Page 24: ...Oil Fuel Oil Ratio 50 1 Power Blend X TM ISO L EGD ISO CD 13738 and J A S O M345 FC FD two stroke air cooled engine oil Gasoline Use 89 Octane unleaded Do not use fuel containing methyl alcohol more t...

Page 25: ...producing use will be covered by this limited warranty for five 5 years from date of purchase EXCEPTIONS For two stroke engine powered products the electronic ignition module flexible drive cables SRM...

Page 26: ...e procedures stale fuel including failure to provide or perform required maintenance services as prescribed in the operator s manual Preventative maintenance as outlined in the operators manual is the...

Page 27: ...t SORE was designed built and equipped to conform with applicable EPA and C A R B emissions standards and that your equipment SORE is free from defects in material and workmanship that would cause it...

Page 28: ...esenting your unit for Warranty service repairs proof of purchase is required echo consumer product support If you require assistance or have questions concerning the applica tion operation or mainten...

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