Toro 74770 User Manual (English)

Questions and Answers:

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Kyle ChandlerAug 22, 2025
Why won't my Toro 74770 Lawn Mower engine start?
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  Andrew GriffinAug 22, 2025
  Your Toro Lawn Mower engine may not start due to several reasons. The fuel tank might be empty, so fill it. The choke may 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 wire(s) might be loose or disconnected, so install the wire(s) on the spark plug. The spark plug(s) could be pitted, fouled, or have an incorrect gap, so install a new, correctly gapped spark plug(s). There might be dirt in the fuel filter, so replace it. There could be incorrect fuel in the fuel tank, so drain the tank and replace the fuel with the proper type. Finally, the oil level in the crankcase might be low, so add oil to the crankcase.
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Jason MartinezAug 23, 2025
Why does my Toro 74770 engine not start?
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  Brian LawsonAug 23, 2025
  If your Toro Lawn Mower engine won't start, struggles to start, or stalls, several factors could be at play. First, ensure the fuel tank isn't empty by filling it. A dirty air cleaner can also cause issues, so clean or replace it. Check that the spark plug wire(s) is securely connected to the spark plug. Inspect the spark plug(s) for damage, and replace if necessary, ensuring correct gapping. Also, a dirty fuel filter can cause problems, so replace it. Finally, ensure the oil level in the crankcase is adequate by adding oil if needed.
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Robert CollinsAug 25, 2025
Why my Toro 74770 engine does not start, starts hard, or fails to keep running?
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  James GilbertAug 25, 2025
  If your Toro Lawn Mower engine does not start, starts with difficulty, or fails to keep running, there are several potential causes. First, ensure the fuel tank is filled. If the air cleaner is dirty, clean or replace it. Check that the spark plug wire(s) is properly connected and that the spark plug(s) is in good condition and correctly gapped. Also, inspect the fuel filter for dirt and replace if necessary. If there's dirt, water, or stale fuel in the fuel system, contact an Authorized Service Dealer. Make sure you're using the correct fuel type and that the oil level in the crankcase is adequate.
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lindajensenAug 27, 2025
What to do if my Toro 74770 Lawn Mower engine overheats?
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  Shelley PerryAug 27, 2025
  If your Toro Lawn Mower engine overheats, several factors could be the cause. The engine load might be excessive, so reduce ground speed. The oil level in the crankcase might be low, so add oil to the crankcase. The cooling fins and air passages under the engine blower housing could be plugged, so remove the obstruction from the cooling fins and air passages. The air cleaner might be dirty, so clean or replace the air cleaner element.
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mstewartAug 27, 2025
How to fix a Toro 74770 engine that loses power?
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  Stephanie SmithAug 27, 2025
  If your Toro Lawn Mower engine loses power, consider these potential causes: The engine load might be excessive, so reduce ground speed. The air cleaner could be dirty, so clean the air cleaner element. The oil level in the crankcase might be low, so add oil to the crankcase. The cooling fins and air passages under the engine blower housing could be plugged, so remove the obstruction from the cooling fins and air passages. The spark plug(s) might be pitted, fouled, or have an incorrect gap, so install a new, correctly gapped spark plug(s). The fuel filter may have dirt in it, so replace the fuel filter.
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Mr. Jason DanielsAug 29, 2025
What causes the blades on my Toro 74770 Lawn Mower not to rotate?
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  Heidi RosarioAug 29, 2025
  If the blades on your Toro Lawn Mower do not rotate, the drive belt may be worn, loose, or broken, so install a new drive belt. The drive belt could be off of the pulley, so install the drive belt and check the adjusting shafts and belt guides for the correct position. Alternatively, the mower belt may be worn, loose, or broken, so install a new mower belt.
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Corey BellAug 30, 2025
Why won't my Toro Lawn Mower drive?
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  Christopher AguilarAug 30, 2025
  If your Toro Lawn Mower won't drive, the bypass valves may be open. Close the tow valves.
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Daniel StevensonAug 31, 2025
Why is my Toro 74770 engine losing power?
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  jeffreylewisAug 31, 2025
  If your Toro Lawn Mower engine is losing power, consider these potential causes: The engine load may be too high; try reducing the ground speed. A dirty air cleaner can restrict airflow, so clean it. Ensure the oil level in the crankcase is adequate by adding oil. Clear any obstructions from the cooling fins and air passages under the engine blower housing. Inspect the spark plug(s) and replace if pitted, fouled, or incorrectly gapped. If the fuel-tank vent is blocked, or if there is dirt in the fuel filter, or if there is dirt, water, or stale fuel in the fuel system, or if there is incorrect fuel in the fuel tank, contact an Authorized Service Dealer.
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kathy88Sep 2, 2025
How to fix uneven cutting height on my Toro 74770?
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  Kelli BellSep 2, 2025
  If your Toro Lawn Mower is leaving an uneven cut, several factors could be responsible. Start by sharpening the blade(s). Replace any cutting blade(s) that are bent. Ensure the mower is level from side-to-side and front-to-rear. Adjust the anti-scalp wheel height if it's not set correctly. Clean the underside of the mower if it's dirty. Adjust the tire pressure to the correct level. If a blade spindle is bent, contact an Authorized Service Dealer.
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Ann DennisSep 3, 2025
What to do if the blades on my Toro Lawn Mower do not rotate?
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  webstermichaelSep 4, 2025
  If the blades on your Toro Lawn Mower aren't rotating, check the following: Install a new drive belt if the current one is worn, loose, or broken. If the drive belt is off the pulley, reinstall it and check the adjusting shafts and belt guides for correct positioning. If the power-takeoff (PTO) switch or PTO clutch is faulty, contact an Authorized Service Dealer. Also, install a new mower belt if the current one is worn, loose, or broken.