Toro 74991 - User Manual

Questions and Answers

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Michele LewisSep 23, 2025
What does it mean when the Malfunction Indicator Light (MIL) comes on in my Toro 74991?
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  Virginia PotterSep 23, 2025
  If the Malfunction Indicator Light (MIL) comes on in your Toro Lawn Mower, consider the following: * Turn the engine off and let it cool if the engine is too hot. * Use new gas if there is old gas in the gas tank. * Open the fuel shutoff valve completely if it is not fully open. * Ensure that the air cleaner and precleaner are clean; replace if necessary. * Charge or replace the battery if it is not charged. * Ensure a good 12 volt battery is being used and is fully charged if the battery voltage is low. * Check and replace any blown fuses.
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Dana LutzSep 15, 2025
Why Toro Lawn Mower vibrates abnormally?
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  Heidi BaileySep 15, 2025
  Abnormal vibration in your Toro Lawn Mower could be due to several reasons: * Bent or unbalanced cutting blades require replacement with new ones. * A loose blade mounting bolt needs tightening. * Loose engine mounting bolts should also be tightened. * Check and tighten any loose engine pulley, idler pulley, or blade pulley. For a damaged engine pulley, bent blade spindle, or loose/worn motor mount, it is recommended to contact an Authorized Service Dealer.
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fgallegosSep 13, 2025
Why does my Toro 74991 machine not drive?
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  richard15Sep 13, 2025
  If your Toro Lawn Mower isn't driving, first check that the bypass valves are closed tight and tighten them if necessary. Also, inspect the pump belt for wear, looseness, or breakage and change the belt if needed. Ensure the pump belt is properly on the pulley. A broken or missing idler spring could also be the problem; replace the spring. Finally, check the hydraulic fluid level and temperature; add hydraulic fluid to the reservoirs or let it cool down.
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Phillip TurnerAug 31, 2025
Why Toro 74991 Lawn Mower engine loses power?
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  Barbara BlankenshipAug 31, 2025
  If your Toro Lawn Mower engine is losing power, consider these potential causes. First, the engine load might be excessive, so reduce the ground speed. A dirty air cleaner can also cause power loss, so clean the air-cleaner element. Additionally, check the oil level in the crankcase and add oil if it's low. Finally, ensure the cooling fins and air passages above the engine are free from obstructions.
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Paul HutchinsonAug 31, 2025
Why Toro Lawn Mower machine does not drive?
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  Sherri WallaceAug 31, 2025
  If your Toro Lawn Mower isn't driving, start by checking that the bypass valves are closed tight. Inspect the pump belt for wear, looseness, or breakage, and change the belt if needed. Also, ensure the pump belt is properly on the pulley. If the idler spring is broken or missing, replace it. Finally, check the hydraulic-fluid level and add fluid to the reservoirs if it's low, or let it cool down if it's too hot.
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Julie ContrerasAug 31, 2025
Why does my Toro Lawn Mower produce an uneven cutting height?
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  kathy73Sep 1, 2025
  An uneven cutting height with your Toro Lawn Mower can be caused by several factors. The blades might not be sharp, so sharpen them. Bent cutting blades can also cause this issue, so install new ones if necessary. Ensure the mower deck is level from side-to-side and front-to-rear. Clean the underside of the mower, as dirt buildup can interfere with cutting height. Adjust the tire pressure to the correct level. For a bent blade spindle, contact an Authorized Service Dealer.
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simondustinSep 1, 2025
What to do if my Toro 74991 produces an uneven cutting height?
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  jennakerrSep 1, 2025
  An uneven cutting height with your Toro Lawn Mower can result from dull or bent blades; sharpen the blade(s) or install new cutting blade(s). Also, the mower deck might not be level; level the mower deck from side-to-side and front-to-rear. A dirty mower underside can also cause this issue; clean the underside of the mower. Incorrect tire pressure could also be the cause; adjust the tire pressure.
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Christian GonzalezDec 1, 2025
What to do if my Toro 74991 Lawn Mower engine does not start or keeps stopping?
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  jessicalopezDec 1, 2025
  If your Toro Lawn Mower engine is not starting, starts with difficulty, or fails to keep running, begin by checking the fuel tank to ensure it's full and that the fuel-shutoff valve is open. Verify the oil level in the crankcase and add oil if it's low. Make sure the throttle control is positioned midway between the SLOW and FAST settings. If these steps don't resolve the issue, inspect the fuel filter for dirt and replace it if needed. Other potential causes include a dirty air cleaner (clean or replace the element), a malfunctioning seat switch (check the indicator and replace the seat if necessary), or corroded/loose/damaged electrical connections (clean and reconnect). Also, check the spark plug for fouling or improper gapping, adjusting or replacing it as necessary, and ensure the spa...
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Christopher JohnsonSep 18, 2025
What causes the clutch on my Toro Lawn Mower to not engage?
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  collinswilliamSep 18, 2025
  If the clutch on your Toro Lawn Mower won't engage, start by checking if the fuse is blown and replace it if necessary. Check the coil resistance, battery charge, charging system, and wiring connections. Also, look for low voltage supply at the clutch, and check the coil resistance, battery charge, charging system, and wiring connections. If the coil is damaged, replace the clutch. Check for inadequate current supply and repair or replace the clutch lead wire or electrical system, cleaning connector contacts. Finally, if the rotor/armature airgap is too large, remove a shim or replace the clutch.
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Olivia YoungSep 15, 2025
What to do if the blades don't rotate on my Toro 74991 Lawn Mower?
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  James BradleySep 15, 2025
  If the blades on your Toro Lawn Mower do not rotate, install a new deck belt, install the mower deck pulley and check the idler pulley, idler arm, and spring for correct position and function, check the belt tension or install a new belt, or replace the spring.

Toro 74991 Specifications

General

Cutting Width	22 inches
Start Type	Recoil
Drive Type	Self-Propelled
Starting System	Recoil
Deck Material	Steel
Oil Capacity	20 oz
Cutting Height	1 inch to 4 inches
Mulch, Bag, Side Discharge	Mulch, Bag, Side Discharge
Wheel Size	8 in (20.3 cm) Front / 11 in (27.9 cm) Rear