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21

P

OWER

 B

LOWER

O

PERATOR

'

S

 M

ANUAL

CARBURETOR

 

ADJUSTMENT

 - 

GENERAL

Engine Break-In

New engines must be operated a minimum duration of two tanks of fuel
break-in 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 Adjustment

High altitude adjustment is not required for proper operation of this
engine.

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.

Before Adjustment

Check that:

• Air filter is clean and properly installed.

• Spark arrestor screen is free of carbon.

• Blower pipes are installed.

1.

Start engine, run at idle for one minute.

2.

Complete warm up by running at full throttle for 5 minutes,
operating choke twice to clear air from carburetor chambers.

3.

Check idle speed and reset if necessary. If a tachometer is
available, idle speed screw (A) should be set to the specifications
found on Page 10 "Specifications" of this manual. Turn idle screw
(A) clockwise to increase idle speed; counter clockwise to
decrease idle speed.

4.

Use a tachometer to adjust idle speed to specifications found on
page 10.

A

Summary of Contents for PB-750H

Page 1: ...l Number 05004460 05999999 PB 750T Serial Number 05005115 05999999 WARNING DANGER Readrulesforsafeoperationandallinstructionscarefully ECHOprovidesthisOperator s Manualwhichmustbereadandunderstoodforp...

Page 2: ...vicingInformation 24 Parts 24 Service 24 ECHO Consumer Product Support 24 Warranty Card 24 Additional or Replacement Manuals 24 Specifications descriptions and illustrative material in this literature...

Page 3: ...duct itself you will find safety alerts and helpful informational messages preceded by symbols or key words The following is an explanation of those symbols and key words and what they mean to you Thi...

Page 4: ...ection whenever unit is used Proper Clothing Wear snug fitting durable clothing Pants should have long legs shirts with long sleeves DONOTWEARSHORTS DONOTWEARTIES SCARVES JEWELRY Wear sturdy work shoe...

Page 5: ...e soreness swelling numbness weakness and extreme pain in those areas Certain repetitive hand activities may put you at a high risk for developing a Repetitive Stress Injury RSI AnextremeRSIconditioni...

Page 6: ...63 3 CC EMISSION COMPLIANCE PERIOD 300 HOURS THIS ENGINE MEETS U S EPA PH2 AND 2000 AND LATER CALIFORNIA EMISSION REGULATIONS FOR S O R E REFER TO OWNER S MANUAL FOR MAINTENANCE SPECIFICATIONS AND ADJ...

Page 7: ...bulb before starting engine draws fresh fuel from the fuel tank priming the carburetor for starting Pump primer bulb until fuel is visible and flows freely in the clear fuel tank return line Pump bul...

Page 8: ...moved all the way forward the blower is at Wide Open Throttle W O T When the lever is moved rearward to detent the blower is at idle When the lever is moved rearward past the idle detent the blower w...

Page 9: ...lb before starting engine draws fresh fuel from the fuel tank priming the carburetor for starting Pump primer bulb until fuel is visible and flows freely in the clear fuel tank return line Pump bulb a...

Page 10: ...0 65mm 0 026in ExhaustSystem SparkArrestorMuffler Fuel Mixed GasolineandTwo strokeOil Fuel OilRatio 50 1 two stroke air cooled engine oil Gasoline 89 Octane unleaded DO NOT use fuel containing methyl...

Page 11: ...notches F in handle clamp with tabs G 6 Slide stick handle onto swivel pipe C Stick handle should be angled away from operator 7 Position stick handle H for comfortable operation and tighten wing nut...

Page 12: ...clamps A NOTE A light lubricant may be used to ease assembly of flexible pipe to blowerelbow 5 Install throttle cable guide H in second groove of flexible pipe 6 Move handle F to desired position Tigh...

Page 13: ...nd premium Power Blend TM Universal 2 Stroke Oil meets these stan dards Engine problems due to inadequate lubrication caused by failure to use an ISO L EGD and J A S O FC certified oil such as Echo pr...

Page 14: ...ard to idle position Slide stop switch B forward to run position PB 750H PB 750T 2 Choke Move choke C up to Cold Start position 3 Primer Pump primer bulb D until fuel is visible and flows freely in th...

Page 15: ...res A STOPPING ENGINE PB 750H 1 Throttle Lever Move throttle lever A to idle detent position and allow engine to return to idle before shutting off engine 2 Move throttle lever A to O Stop position PB...

Page 16: ...for a few minutes 3 Set engine speed with throttle lever A 4 Use lower speed to blow dry leaves from walks patios and drives 5 Additional speed may be necessary to clean grass and leaves from a lawn o...

Page 17: ...O H 6 S H T N O M 0 7 2 R O S R U O H Y L R A E Y s e r u d e c o r P e c n a n e t n i a M r e l a e D o h c E d e d n e m m o c e R t r o P t s u a h x E r e d n i l y C n o b r a c e D n a e l C t...

Page 18: ...element can be cleaned and reused be certain it still fits the cavity in the air cleaner cover is installed with the original side out FUEL FILTER Level1 Tools required 200 250 mm 8 10 in length of w...

Page 19: ...cleaning of cooling fins is considered Normal Maintenance Any failure attributed to lack of maintenance is not warranted Cleaning Grill 1 Remove accumulated debris from intake grill between backpack f...

Page 20: ...ecked periodically 1 Remove spark plug and engine cover four screws 2 Remove spark arrestor cover A and spark arrestor screen B from muffler Replace screen if plugged with carbon deposits 3 Install sp...

Page 21: ...E Do not adjust carburetor unless necessary If you have difficulty see your ECHO dealer BeforeAdjustment Check that Air filter is clean and properly installed Spark arrestor screen is free of carbon B...

Page 22: ...e v o C l e u f h t i w d e l u o F e v i t c e f e d g u l P n i 6 2 0 0 m m 5 6 o t t s u j d A e c a l p e r r o n a e l C e c a l p e r r o n a e l C g u l p e c a l p e R s n u r e n i g n E r o...

Page 23: ...age or personal injury may result Long Term Storage Over 30 Days Do not store your unit for a prolonged period of time 30 days or longer without performing protective storage mainte nance which includ...

Page 24: ...nce of this product you may call the ECHO ConsumerProductSupportDepartmentat1 800 673 1558from8 30am to 4 30 pm Central Standard Time Monday through Friday Before calling please know the model and ser...

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