Echo SHRED 'N' VAC ES-252, Руководство оператора

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ES-252 MAINTENANCE
X7501185002
27
© 01/2019 ECHO Inc.
Carburetor Adjustment
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 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 adjusted by an authorized ECHO
service dealer.
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.
Always operate unit in a clear work area. Keep hands clear of moving parts during adjustmemt
otherwise serious bodily injury may occur.
Before adjustment make sure that:
• Check for correct spark plug (BPM-8Y P/N 15901019830) and gap: .026 in (0.65 mm).
• The air filter element is clean and properly installed.
• The muffler spark arrestor screen and exhaust port are clear of carbon.
• The fuel lines, tank vent, and fuel filter are in good condition and clear of debris.
• The fuel is fresh ( > 89 octane : RON+MON/2 ) and properly mixed at 50 : 1 with “ISO L-EGD” or
“JASO-FD” 2-stroke oil.
• Blower pipes are installed.
Start and run engine for 3 minutes. Adjust idle speed screw to 2,700 +/- 100 rpm. If engine does not run
correctly after this adjustment, adjust carburetor.
1. Turn Hi mixture needle (B) clockwise (CW) until lightly
seated. And then turn Hi mixture needle (B) (CCW) 7/8
turns. Turn idle mixture needle (A) (CW) until lightly seated.
And then turn idle mixture needle (A) (CCW) 3 7/8 turns.
2. Turn idle adjust screw (D) until the head touches boss. Then
turn idle adjust screw (D) (CCW) 5 5/8 turns.
3. Adjust idle mixture needle (A) to achieve 2700 RPM.
4. Adjust Hi mixture needle (B) and obtain 7250 RPM
Parts Required: None