TROUBLESHOOTING
Engine
If | Check |
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Poor Engine Performance | Fuel: |
| • Dirt in fuel system or fuel is old. |
| Replace fuel with fresh stabilized fuel. |
| Obtain fuel from another supplier |
| before suspecting machine problems. |
| Suppliers blend fuels differently and |
| changing suppliers will generally solve |
| any performance problems. |
| • Fuel blended with alcohol or ether |
| may contribute to performance |
| problems by causing gum and varnish |
| deposits, especially if fuel is stored for |
| several weeks or more. Obtain fresh |
| fuel. |
|
|
Engine Will Not Start Or Is | • Park brake lever not in the proper |
Hard To Start | position. |
| • OPC switch not depressed. Stand on |
| platform or adjust switch. |
| • Check that motion control levers are in |
| neutral and neutral switches are |
| correctly adjusted. |
| • PTO engaged. |
| • Stale or improper fuel/fuel level. |
| • Plugged fuel filter. |
| • Plugged air intake filter. |
| • Spark plug wires loose or |
| disconnected. |
| • Spark plugs not gapped correctly. |
| • Blown fuse. |
| • Electrical problem – dead battery. |
| • Choke adjusted incorrectly. See your |
| authorized dealer. |
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Engine Will Not Slow Idle | • Carburetion problems. See your |
| authorized dealer. |
| • Bent or kinked throttle cable. |
| • Bent governor control. |
| • Incorrect governor idle control. |
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Engine Runs Rough or Stalls | • Plugged fuel filter. |
| • Plugged air intake system. |
| Fuel cap vent dirty. |
| • Stale or improper fuel/fuel level. |
| • Spark plugs not gapped correctly. |
| • Replace spark plugs. |
| • Choke adjusted incorrectly. See your |
| authorized dealer. |
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If | Check |
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Engine Knocks | • Engine oil level low. |
| • Reduce load. (Slower ground speed.) |
| • Fuel is bad. Fill tank with fresh fuel, |
| correct octane. |
| • Idle speed too slow. |
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Engine Overheats | • Clean cooling fins. |
| • Low oil level. |
| • Do not operate at slow idle. Operate |
| at fast idle. |
| • Cooling air intake screen is dirty. |
| • Plugged carburetor air intake filter. |
| • Plugged air intake filter. |
| • Operating at too fast ground speed for |
| conditions. |
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Engine Lacks Power | • Reduce load. |
| • Plugged air intake system. |
| • Plugged fuel filter. |
| • Improper type of fuel. Drain tank and |
| fill with correct fuel. |
| • Clean cooling fins to help prevent |
| overheating. |
| • Replace spark plugs. |
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Engine Uses Too Much Oil | • Find and correct oil leaks. |
| • Incorrect engine oil. |
| • Plugged oil filter. |
| • Plugged air intake filter. |
| • Worn engine components. |
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Engine Backfires Through | • Throttle lever should be at low idle for |
Muffler | thirty seconds before turning off |
| machine. |
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High Fuel Consumption | • Improper type of fuel. |
| • Plugged air intake system. |
| • Operating at too fast ground speed for |
| conditions. |
| • Improper valve clearance. See your |
| authorized dealer. |
| • Restricted air intake system. |
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Other Symptoms | • See engine manufacturer’s owner’s |
| manual provided with your machine for |
| additional information. |
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Electrical System
Troubleshooting - 31
