Toro 74538 User Manual

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FormNo.3368-458RevA

GrandStand

®

Mower

With48in,52inor60inTURBOFORCE

®

CuttingUnit

ModelNo.74538—SerialNo.311000001andUp

ModelNo.74539—SerialNo.311000001andUp

ModelNo.74548—SerialNo.311000001andUp

ModelNo.74549—SerialNo.311000001andUp

ModelNo.74553—SerialNo.311000001andUp

ModelNo.79548—SerialNo.311000001andUp

ModelNo.79549—SerialNo.311000001andUp

ModelNo.79553—SerialNo.311000001andUp

ToregisteryourproductordownloadanOperator'sManualorPartsCatalogatnocharge,gotowww.Toro.com.OriginalInstructions(EN)

Table of Contents

Questions and Answers:

T
tammy10Aug 7, 2025
Why my Toro Lawn Mower engine will not start?
- T
  theresa14Aug 7, 2025
  If your Toro Lawn Mower engine won't start, starts with difficulty, or stops running, several factors could be the cause. First, ensure the fuel tank isn't empty and the shut-off valve is open; if not, fill the tank with gasoline and open the valve. Also, make sure the choke is engaged by moving the choke lever to the choke position. Check that the spark plug wire is securely connected to the spark plug. Inspect the spark plug itself; if it's damaged or has an incorrect gap, replace it. A dirty air cleaner can also cause this issue, so service the air cleaner element. Finally, check for a dirty fuel filter and replace it if necessary.
C
Carly HenryAug 12, 2025
Why does my Toro 74538 engine lose power?
- T
  Tammy KirbyAug 12, 2025
  If your Toro Lawn Mower engine is losing power, there are several potential causes. First, the engine load might be excessive, so try reducing your ground speed. A dirty air cleaner can also cause power loss; service the air cleaner. 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 free from obstructions. Inspect the spark plug; if it's pitted, fouled, or the gap is incorrect, replace it. Also, check if the vent hole in the fuel cap is plugged; clean or replace the cap if needed. Finally, a dirty fuel filter can cause power loss; replace the fuel filter.
S
Stephen GonzalezAug 16, 2025
Why is my Toro Lawn Mower engine overheating?
- D
  Donna KennedyAug 16, 2025
  If your Toro Lawn Mower engine is overheating, several factors could be the cause. The engine load might be too high, so try reducing the ground speed. Also, 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 free from obstructions; remove any obstructions you find.
E
Erica PerkinsAug 20, 2025
How to fix uneven cutting height on my Toro Lawn Mower?
- E
  Eduardo EatonAug 20, 2025
  If your Toro Lawn Mower is producing an uneven cutting height, several factors could be the cause. Ensure the blades are sharp; sharpen them if necessary. Check if the cutting blades are bent and replace them if they are. Make sure the mower deck is level and adjust it if it is not level side-to-side. Adjust the front-to-rear pitch of the mower deck. Clean the underside of the mower deck if it's dirty. Finally, ensure the tire pressure is correct and adjust if necessary.
A
Amy MasseyAug 25, 2025
What to do if the blades do not rotate on my Toro 74538?
- M
  Matthew JohnsonAug 26, 2025
  If the blades on your Toro Lawn Mower do not rotate, there are several potential causes. Check the pump drive belt for wear, looseness, or breakage and check the belt tension. Ensure the pump drive belt is properly positioned on the pulley. Inspect the mower deck belt for wear, looseness, or breakage and install a new deck belt if needed. Also, check that the mower deck belt is correctly positioned on the pulley. Replace the spring if the idler spring is broken or missing. Adjust the clutch air gap if the electric clutch is out of adjustment.
V
vallenAug 29, 2025
What to do if my Toro Lawn Mower has abnormal vibration?
- L
  Leah SpencerAug 29, 2025
  If your Toro Lawn Mower is experiencing abnormal vibration, several issues could be the cause. Start by checking the cutting blades; if they are bent or unbalanced, replace them. Ensure the blade mounting bolt is tightened securely. Also, check the engine mounting bolts and tighten them if they are loose. Inspect the engine pulley, idler pulley, or blade pulley for looseness and tighten the appropriate pulley.
S
Samantha DominguezSep 2, 2025
Why does my Toro 74538 Lawn Mower not drive?
- F
  fernandoramirezSep 2, 2025
  If your Toro Lawn Mower does not drive, several issues could be the cause. Start by checking the hydraulic oil reservoir and add hydraulic oil if the level is low. If there is air in the hydraulic system, bleed the air out. Inspect the pump drive belt for slipping and replace it if necessary. Replace the pump drive belt idler spring if it is missing. Finally, check if the pump by-pass valves are open and tighten them.

Toro 74538 Specifications

General

Model	74538
Category	Lawn Mower
Deck Material	Steel
Engine Displacement	163cc
Grass Discharge	Side, Bag, Mulch

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