MAINTENANCE AND CARE
Idle adjusting screw (T) |
|
| CARBURETOR ADJUSTMENT |
|
|
| Every unit is run at the factory and the carburetor is |
|
|
| set in compliance with Emission Regulations. In |
|
|
| addition, the carburetor is equipped with “H” (High |
|
|
| Speed) and “L” (Low Speed) needle adjustment |
|
|
| limiters that prevent settings outside acceptable |
|
|
| limits. |
|
|
| 1. Before adjusting carburetor clean or replace air |
|
|
| filter and muffler, “Spark Arrestor Screen”. |
|
|
| 2. Make sure the bar and chain are properly |
|
|
| adjusted. |
Low speed needle (L) | High speed needle (H) |
| 3. Start engine and run several minutes to bring to |
| operating temperature. Flash choke twice during | ||
|
|
| |
|
|
| |
|
|
| 4. Stop engine. |
|
|
| Turn “H” speed needle counterclockwise (CCW) |
|
|
| to stop. |
|
|
| Turn “L” speed needle midway between full |
|
|
| clockwise (CW) stop and CCW stop. |
|
|
| 5. Idle Speed Adjustment: |
|
|
| • Start engine, turn “Idle” speed adjustment |
|
|
| screw CW until the saw chain begins to turn, |
|
|
| then turn screw out CCW until the saw chain |
|
|
| stops turning. |
|
|
| Turn screw out, CCW, an additional 1/4 turn. |
|
|
|
|
|
|
| WARNING |
|
|
| CUTTING ATTACHMENT MUST NOT MOVE |
|
|
| WHEN UNIT IS IDLING. |
|
|
|
|
|
| 6. Accelerate to full throttle for 2 - 3 seconds to | |
|
|
| clear any excess fuel in the engine, then return |
|
|
| to idle. |
|
|
| Accelerate engine to full throttle to check for |
|
|
| smooth transition from idle to high speed. |
|
|
| If engine hesitates turn “L” needle CCW 1/8 turn |
|
|
| and repeat acceleration. |
|
|
| Continue adjustment until smooth acceleration |
|
|
| results. |
|
| 7. Check idle speed and reset if necessary as | |
|
|
| described in item 5. If a tachometer is available |
|
|
| idle speed should be set to 2,400 - 2,900 r/min. |
|
|
|
|
|
|
| CAUTION |
|
|
| When starting, idling adjustment speed |
|
|
| should be adjusted not to rotate the saw |
|
|
| chain. Correct idle speed is adjusted 2,400 to |
|
|
| 2,900 r/min. Or 1/4 turn CCW from the point |
|
|
| the chain stops moving. |
|
|
| When there is some trouble with the |
|
|
| carburetor, contact your dealer. |
|
|
|
|
19 |