Toro 74177 User Manual (English)

Questions and Answers:

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cmonroeJul 31, 2025
Why Toro Lawn Mower engine will not start?
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  David HamptonJul 31, 2025
  Your Toro Lawn Mower might not start due to several reasons: the fuel tank could be empty, so fill it with gasoline; the fuel valve might be turned off, so open it; the choke might not be on, so move the choke lever to the on position; the air cleaner could be dirty, so clean or replace the air cleaner element; the spark plug wires might be loose or disconnected, so install them on the spark plug; the spark plugs might be pitted, fouled, or have an incorrect gap, so install new, correctly gapped spark plugs; or there might be dirt in the fuel filter, so replace it. If none of these solve the issue, it is possible that there is dirt, water, or stale fuel in the fuel system.
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Thomas TaylorAug 4, 2025
Why does my Toro 74177 engine lose power?
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  Nicholas McbrideAug 4, 2025
  Your Toro Lawn Mower engine may lose power if the engine load is excessive, so reduce the ground speed. A dirty air cleaner can also cause this, so clean the air cleaner element. Check the oil level in the crankcase and add oil if it's low. Make sure the cooling fins and air passages under the engine blower housing are not plugged; if they are, remove the obstruction. Also, ensure the spark plugs are not pitted, fouled, or have an incorrect gap by installing new, correctly gapped spark plugs. Verify the vent in the fuel cap is open and replace the fuel filter if it's dirty. If the problem persists, there might be dirt, water, or stale fuel in the fuel system.
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Maria MeyerAug 8, 2025
How to fix uneven cutting height on Toro 74177 Lawn Mower?
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  browngeorgeAug 8, 2025
  To fix uneven cutting height on your Toro Lawn Mower, start by sharpening the blade(s). If the cutting blade(s) is/are bent, install new cutting blade(s). Ensure the mower is level from side-to-side and front-to-rear. Check that the gage wheel is set correctly by adjusting the gage wheel height. Clean the underside of the mower if it's dirty, and adjust the tire pressure if it's incorrect. If the issue persists, the blade spindle might be bent.
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Christine LynnAug 12, 2025
What to do if my Toro Lawn Mower starter does not crank?
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  Jason JonesAug 12, 2025
  If the starter on your Toro Lawn Mower doesn't crank, it could be due to several reasons. Ensure the blade control (PTO) is disengaged, the parking brake is set, and you are seated on the seat. Also, check if the battery is dead and charge it if necessary. Inspect electrical connections for corrosion or looseness, and replace the fuse if it's blown. If these steps don't resolve the issue, the relay or switch might be defective.
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John DavisAug 17, 2025
What causes abnormal vibration in Toro 74177?
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  Sean LinAug 17, 2025
  Abnormal vibration in your Toro Lawn Mower can be caused by loose engine mounting bolts, so tighten them. Check for loose engine pulley, idler pulley, or blade pulley, and tighten the appropriate pulley. Bent or unbalanced cutting blade(s) can also cause vibration, so install new cutting blade(s). Ensure the blade mounting bolt is tightened. If the issue persists, it could be due to a damaged engine pulley or bent blade spindle.
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kathy90Aug 21, 2025
Why Toro Lawn Mower engine overheats?
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  Robin HernandezAug 21, 2025
  The Toro Lawn Mower engine may overheat if the engine load is excessive, so reduce the ground speed. Ensure that the oil level in the crankcase is adequate by adding oil if it's low. Also, check for any obstructions in the cooling fins and air passages under the engine blower housing and remove them.
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David MooreAug 26, 2025
What to do if Toro 74177 blades do not rotate?
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  patelmartinAug 26, 2025
  If the blades on your Toro Lawn Mower do not rotate, it could be due to a worn, loose, or broken drive belt, so install a new drive belt. Another possibility is that the drive belt is off the pulley, so install the drive belt and check the adjusting shafts and belt guides for correct position. Also, the deck belt might be worn, loose, or broken, so install a new deck belt.