
HS81A CUT-OFF  SAW — TROUBLESHOOTING (ENGINE)
TABLE 4. TROUBLESHOOTING (ENGINE, CONTINUED)
| SYMPTOM | POSSIBLE CAUSE | SOLUTION | |
| 
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| 
 | Air cleaner not clean? | Clean or replace air cleaner. | |
| 
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| 
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 | Check float adjustment. | |
| "Weak in power" compression is proper | Improper fuel level in carburetor? | 
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| Rebuild carburetor. | |||
| and does not misfire. | 
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| 
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 | ||
| 
 | Defective spark plug? | Clean or replace spark plug. | |
| 
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| 
 | Improper spark plug gap? | Set to proper gap. | |
| 
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| 
 | Water in fuel system? | Flush fuel system and replace | |
| 
 | with correct type fuel. | ||
| 
 | 
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| "Weak in power" compression is proper | 
 | 
 | |
| Ignition coil defective? | Replace ignition coil. | ||
| but misfires. | |||
| 
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 | 
 | |
| 
 | Dirty spark plug? | Clean or replace spark plug. | |
| 
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 | 
 | |
| 
 | Wrong fuel type? | Flush fuel system, and replace | |
| 
 | with correct type of fuel. | ||
| 
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 | 
 | |
| Engine overheats. | Spark plug heat value improper? | Replace with correct type of | |
| 
 | spark plug. | ||
| 
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| 
 | Cooling fins dirty? | Clean cooling fins. | |
| 
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| 
 | Governor adjusted correctly? | Adjust governor. | |
| 
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| Rotational speed fluctuates. | Governor spring defective or missing? | Replace governor spring. | |
| 
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| 
 | Fuel flow restricted? | Check entire fuel system for | |
| 
 | leaks or clogs. | ||
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| 
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| 
 | Recoil mechanism clogged with dust and | Clean recoil assembly with soap | |
| Recoil starter malfunction. | dirt? | and water. | |
| 
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| 
 | Spiral spring loose? | Replace spiral spring. | |
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PAGE 28 — HS81A