Echo X7503196704, X750010904 instruction manual Exhaust Port Cleaning

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A

B

C

Exhaust Port Cleaning

Parts Required: As needed: Muffler gasket

1.Remove air cleaner cover and remove spark plug lead.

2.Remove guide bar and saw chain. See "Guide Bar and Saw Chain Installation/Removal."

3.Remove muffler support bracket (A).

4.Place piston at top dead center. Remove muffler (B) and muffler gasket (C ).

5.Use a wood or plastic scraping tool to clean depos- its from cylinder exhaust port.

IMPORTANT

Never use a metal tool to scrape carbon from the exhaust port.

Do not scratch the cylinder or piston when cleaning the exhaust port. Do not allow carbon particles to enter the cylinder.

6.Inspect muffler gasket, and replace if damaged.

7.Install muffler gasket and muffler.

8.Tighten muffler mounting bolts (or nuts) to 60-95 in • lbf (70-110 kgf • cm).

9.Install muffler support bracket (A).

10.Install guide bar and saw chain. See "Guide Bar and

Saw Chain Installation/Removal."

11.Install spark plug lead and air cleaner cover.

12.Start engine, and warm to operating temperature.

Stop engine.

13.Remove air cleaner cover and remove spark plug lead.

14.Remove guide bar and saw chain. See "Guide Bar and Saw Chain Installation/Removal."

15.Remove muffler support bracket.

16.Re-tighten mounting bolts (or nuts) to specifications.

17.Install muffler support bracket.

18.Install guide bar and saw chain. See "Guide Bar and

Saw Chain Installation/Removal."

19.Install spark plug lead and air cleaner cover.

CS-450

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Contents Chain Saw Kickback Safety Precautions for Chain Saw Users Rules for Safe OperationOther Safety Precautions Contents Symbols and SignsSymbol Form DecalsPacking List Emission Data emission control exhaust & evaporativeNomenclature of Parts Operator Safety Front handle for the left hand Support hanVibration and Cold Repetitive Stress InjuryEYE and Hearing Protection Wear Proper ClothingCorrect USE of Chain Brake Spark Arrestor MufflerKick Guard to BAR INSTRUC- Tions Preparation for USEGuide BAR and SAW Chain IN- STALLATION/REMOVAL Adjusting Chain Tension Handling Fuel Chain Lubricant Mixing InstructionsOperation When the Engine is Cold When the Engine is WarmRunning StoppingChecking Chain Tension Chain Lubrication TestCutting Instruction GeneralFelling the Tree Limbing Testing the Brake Chain Brake OperationAutomatic Chain Brake Winter OperationChain and Guide BAR Combination CS-450Maintenance and Care Maintenance IntervalsCarburetor Adjustment Engine Break-InAIR Filter OIL FilterCheck Fuel System Spark PlugGuide BAR SprocketCylinder Fins Muffler Spark ArrestorExhaust Port Cleaning Setting the SAW Chain Setting SAW Chain64 mm 0.025 Troubleshooting Technical Data Storage After USEExceptions 99922201032 11/18/2011 99922201033 ECHO, Incorporated

X750010904, X7503196704 specifications

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