SECTION 9: TROUBLE SHOOTING GUIDE
Trouble | Possible Cause(s) | Corrective Actions | ||
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Engine fails to | 1. | Blade control handle disengaged. | 1. | Engage blade control handle. |
start | 2. | Spark plug wire disconnected. | 2. | Connect wire to spark plug. |
| 3. | Dirty aircleaner. | 3. | Refer to the engine manual. |
| 4. | Primer button not depressed. | 4. | Refer to the engine manual. |
| 5. | Throttle control lever (if so equipped) not in | 5. | Move throttle lever to FAST or START position. |
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| correct starting position . |
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| 6. | Fuel tank empty or stale fuel. | 6. | Fill tank with clean fresh gasoline. |
| 7. | Blocked fuel line | 7. | Clean fuel line. |
| 8. | Faulty spark plug. | 8. | Clean, adjust gap or replace. |
| 9. | Engine flooded. | 9. | Refer to the engine manual. |
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Engine runs | 1. | Spark plug wire loose. | 1. | Connect and tighten spark plug wire. |
erratic | 2. | Blocked fuel line, if equipped, or stale fuel. | 2. | Clean fuel line; fill tank with clean, fresh gasoline. |
| 3. | Vent in gas cap plugged. | 3. | Clear vent or threads or replace. |
| 4. | Water or dirt in fuel system. | 4. | Drain fuel tank. Refill with fresh fuel. |
| 5. | Dirty air cleaner. | 5. | Refer to the engine manual. |
| 6. | Carburetor out of adjustment. | 6. | Refer to the engine manual. |
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Engine | 1. | Engine oil level low. | 1. | Fill crankcase with proper oil. |
overheats | 2. | Dirty aircleaner. | 2. | Refer to the engine manual. |
| 3. | Air flow restricted. | 3. | Stop engine and disconnect spark plug wire. |
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| Remove blower housing and clean. |
| 4. | Carburetor not adjusted properly. | 4. | Refer to the engine manual. |
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Occasionally | 1. | Spark plug gap too close. | 1. | Adjust gap to .030". |
skips at high | 2. | Carburetor idle mixture adjustment | 2. | Refer to the engine manual packed with your unit. |
speed |
| improperly set. |
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Idles poorly | 1. | Spark plug fouled, faulty or gap too wide. | 1. | Reset gap to .030" or replace spark plug. |
| 2. | Carburetor improperly adjusted. | 2. | Refer to the engine manual. |
| 3. | Dirty air cleaner. | 3. | Refer to the engine manual. |
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Excessive | 1. | Cutting blade loose or unbalanced. | 1. | Tighten blade and adapter. Balance blade. |
vibration | 2. | Bent cutting blade. | 2. | See an authorized service dealer. |
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Mower will not | 1. | Wet grass. | 1. | Do not mow when grass is wet; wait until later to cut. |
mulch grass | 2. | Excessively high grass. | 2. | Mow once at a high cutting height, then mow again |
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| at desired height or make a narrower cutting swath |
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| (1/2 width). |
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Uneven cut | 1. | Wheels not positioned correctly. | 1. | Place all four wheels in same height position. |
| 2. | Dull blade. | 2. | Sharpen or replace blade. |
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NOTE: For repairs beyond those listed above, contact a Bolens authorized service dealer.
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