
MVC-70H/HW  — TROUBLESHOOTING (ENGINE)
TABLE 8. ENGINE TROUBLESHOOTING (CONTINUED)
SYMPTOM | POSSIBLE CAUSE  | SOLUTION  | |
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  | Air cleaner not clean?  | Clean or replace air cleaner  | |
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  | Improper level in carburetor?  | Check float adjustment,   | |
"Weak in power" compression is proper  | carbureator.  | ||
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and does not misfire.  | 
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Defective Spark plug?  | Clean or replace spark plug.  | ||
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  | Defective Spark plug?  | 
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  | Water in fuel system?  | Flush fuel system, and replace  | |
  | with correct type of fuel.  | ||
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"Weak in power" compression is proper  | 
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Dirty spark plug?  | Clean or replace spark plug.  | ||
but misfires.  | |||
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  | Ignition coil defective?  | Replace ignition coil.  | |
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  | Spark plug heat value improper?  | Replace with correct type of  | |
  | spark plug.  | ||
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Engine overheats.  | 
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Correct type of fuel?  | Replace with correct type of fuel  | ||
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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?  | Replace governor spring.  | |
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  | Fuel flow restricted?  | Check entire fuel system for leaks  | |
  | or clogs.  | ||
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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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  | Sprial spring loose?  | Replace sprial spring.  | |
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