TROUBLESHOOTING
en
Using Troubleshooting Chart
WARNING: Always stop unit and disconnect spark plug before performing all of the recommended remedies below except remedies that require operation of the unit.
When you have checked all the possible causes listed and you are still experiencing the problem, see your Servicing Dealer. If you are experiencing a problem that is not listed in this chart, see your Servicing Dealer for service.
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| POSSIBLE CAUSE |
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| SOLUTION |
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| Engine | will not | start or | will | 1. No spark |
| 1. Check Spark. Remove air filter cover. Remove | |||||||
| run only a few seconds after |
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| spark plug from cylinder. Reattach | the spark | ||||||||
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| plug wire and lay spark plug on top of cylinder. | ||||||||||
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| starting. |
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| Pull the starter rope and watch for spark at | ||||||
| (Make sure Ignition switch |
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| spark plug tip. If there is no spark, repeat test | |||||||||
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| with a new spark plug (CMR6A). |
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| is in start position “I”) |
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| 2. With the ignition switch off, remove spark plug. | ||||||||||
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| 2. Flooded engine. |
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| Move choke lever to Run position (pushed in | ||||||
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| completely) and pull starter cord 15 to 20 times. | |||||||
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| This will clear excess fuel from engine. Clean | ||||||
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| and reinstall spark plug. Pull the choke lever all | ||||||
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| out and then insert it completely in order to acti- | ||||||
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| vate the | ||||||
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| three times with choke lever at run. If engine | ||||||
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| does not start, move choke lever to choke and | ||||||
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| repeat normal starting procedure. If engine still | ||||||
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| fails to start, repeat procedure with a new spark | ||||||
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| plug. |
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| Engine starts but will not | Carburetor requires “L” (Low jet) | * | Contact a Servicing Dealer for carburetor adju- | ||||||||||
| accelerate properly: |
| adjustment. |
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| stment. |
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| Engine starts but will not run | Carburetor requires “H” (High jet) | * | Contact a Servicing Dealer for carburetor adju- | ||||||||||
| properly at high speed. |
| adjustment. |
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| Engine does not reach full | 1. Check oil fuel mixture. |
| 1. | Use fresh fuel and the correct |
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| speed and / or emits excessi- | 2. Air filter dirty. |
| 2. | Clean per instruction in | |||||||||
| ve smoke |
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| 3. Spark arrester screen dirty. |
| 3. Clean per instructions in | |||||||||
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| Arresting Muffler Section. |
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| 4. Carburetor requires “H” | (High jet) | 4. * Contact a Servicing Dealer for | carburetor | ||||||
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| adjustment. |
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| adjustment. |
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| Engine | starts, | runs, | and | Carburetor requires adjustment. | Turn idle speed screw “T” clockwise to increase | ||||||||
| accelerates but will not idle. |
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| idle speed. (If chain turns at idle, turn idle speed | ||||||||||
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| screw “T” counterclockwise to decrease speed); | |||||||||||
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| see |
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| Bar and Chain Running Hot | 1. Chain oil tank empty. |
| 1. Oil tank should be filled every time that fuel | ||||||||||
| and Smoking |
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| 2. Chain tension too tight. |
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| tank is filled. |
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| 2. Tension | chain | per instructions in | Operation- | |||||||
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| 3. Oiler function. |
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| Chain Tension section. |
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| 3. | Run at full throttle 15 to 30 seconds. Stop saw | |||||||
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| and check for oil dripping from bar tip guard | ||||||
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| and guide bar. If oil is present the chain may | ||||||
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| be dull or bar may be damaged. If no oil con- | ||||||
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| tact a Servicing Dealer. |
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| Engine starts and runs, but | 1. Chain brake engaged. |
| 1. Release | chain brake, see | |||||||||
| chain is not rotating |
| 2. Chain tension too tight. |
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| Brake Section. |
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| 2. Tension | chain | per instructions in | Operation- | |||||
| WARNING: | Never | 3. Guide bar and chain assembly. |
| Chain Tension section. |
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| 3. Refer to | |||||||||||||
touch the chain while | ||||||||||||||
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| Chain Section. |
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| the engine is running. | 4. Chain and/or guide bar damaged. | 4. Refer | to | and/or | |||||||||
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| 5. Clutch drum and/or rim | sprocket | 5. Replace | if necessary - contact a | Servicing | |||||
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*Note: This engine complies with EPA (Environmental Protection Agency) and CARB (California Air Resource Board) regulations which require exhaust emission control. As a result, the carburetor adjustment needles are equipped with plastic caps that limit the rotation from the original factory adjustment. If your unit exhibits specific performance problems that can not be corrected by the Trouble Shooting Section, the unit should be taken to a Servicing Dealer for repair.
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