Toro 74312 - User Manual

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FormNo.3414-678RevA

ZMaster

®

8000SeriesRiding

Mower

with48inCuttingUnit

ModelNo.74312—SerialNo.400000000andUp

ModelNo.74313—SerialNo.400000000andUp

Registeratwww.Toro.com.

OriginalInstructions(EN)

*3414-678*A

Table of Contents

Other manuals for Toro 74312

Setup Instructions16 pages

Questions and Answers

E
Elizabeth JenkinsSep 12, 2025
What to do if my Toro 74312 Lawn Mower machine does not drive?
- M
  Mckenzie GoodmanSep 12, 2025
  If your Toro Lawn Mower isn't driving, start by checking if the bypass valve is tightly closed; tighten it if necessary. Also, inspect the drive or pump belt for wear, looseness, or breakage, and replace it if needed. Ensure the drive or pump belt is properly on the pulley. Replace the idler spring if it's broken or missing. Lastly, verify that the hydraulic fluid level is adequate and not too hot; add fluid or allow it to cool down if necessary.
A
amandaliAug 25, 2025
Why won't my Toro 74312 starter crank?
- K
  Kristy SawyerAug 25, 2025
  If your Toro Lawn Mower's starter isn't cranking, several safety mechanisms might be the cause. Ensure the blade-control switch (PTO) is disengaged, the parking brake is engaged, and the motion-control levers are in the NEUTRAL-LOCK position. Also, make sure the operator is seated. A dead battery, corroded or loose electrical connections, or a blown fuse can also prevent the starter from cranking. To resolve some of these issues, move the blade-control switch (PTO) to the disengaged position, engage the parking brake, ensure that the motion-control levers are in the NEUTRAL-LOCK position, sit on the seat, charge the battery, check the electrical connections for good contact, and replace the fuse. In the case of a worn or damaged relay or switch, contact an Authorized Service Dealer.
A
Alyssa HillAug 25, 2025
Why won't my Toro Lawn Mower engine start?
- R
  robinsonwendyAug 26, 2025
  If your Toro Lawn Mower's engine is having trouble starting, running, or staying on, there are several things you can check. First, ensure the fuel tank is full and the crankcase has enough oil. Position the throttle control midway between the slow and fast settings. You might also need to replace the fuel filter or clean/replace the air-cleaner element. Check the seat-switch indicator, replacing the seat if required. Inspect the electrical connections, clean the terminals, apply dielectric grease, and reconnect. Finally, adjust or replace the spark plug and check its wire connection.
J
Jason ColeSep 23, 2025
What to do if my Toro 74312 engine overheats?
- K
  Kelly GillespieSep 23, 2025
  If your Toro Lawn Mower engine is overheating, it could be due to a few reasons. First, reduce the ground speed if the engine load is excessive. Ensure the oil level in the crankcase is adequate by adding oil if it's low. Also, check the cooling fins and air passages for the engine and remove any obstructions.
A
Amy GarciaSep 12, 2025
Why does my Toro 74312 pulls left or right (with levers fully forward)?
- S
  Shelia GraySep 12, 2025
  If your Toro Lawn Mower pulls to the left or right even with the levers fully forward, it could be due to a few reasons. The tracking may need adjustment, so adjust the tracking. Also, check the tire pressure in the drive tires and adjust them as needed. Finally, the reverse indicator and speed control linkage might need adjustment.
B
barbara64Sep 16, 2025
Why is my Toro 74312 vibrating so much?
- K
  Kristi BrownSep 16, 2025
  If your Toro Lawn Mower is vibrating abnormally, consider the following: 1. Install new cutting blade(s). 2. Tighten the blade mounting bolt. 3. Tighten the engine mounting bolts. 4. Tighten the appropriate pulley. 5. Install new belt. If the issue persists, contact an Authorized Service Dealer.
J
Jimmy TapiaSep 5, 2025
What to do if Toro 74312 engine loses power?
- D
  Diamond KingSep 5, 2025
  If your Toro Lawn Mower engine loses power, several factors could be responsible. Start by reducing the ground speed if the engine load is excessive. Check if the air cleaner is dirty and clean it if necessary. Make sure that the oil level in the crankcase is at the correct level. Also, ensure that the cooling fins and air passages are free from obstructions. Clean or replace the fuel cap if the vent hole is plugged. Replace the fuel filter if it is dirty. For issues related to dirt, water, or stale fuel in the fuel system, it is recommended to contact an Authorized Service Dealer.
C
Christopher AcostaSep 6, 2025
Why is my Toro Lawn Mower engine losing power?
- J
  Jeremy KingSep 6, 2025
  If your engine loses power, it could be due to several reasons. Firstly, the engine load might be excessive, so try reducing the ground speed. A dirty air cleaner can also cause power loss, so clean the air-cleaner element. Check the oil level in the crankcase and add oil if it's low. Make sure that the cooling fins and the air passages above the engine are not plugged, and clean or replace the fuel cap if the vent hole is plugged. Replace the fuel filter if it's dirty.
D
Dr. Alexis Adams DDSNov 27, 2025
Why is my Toro Lawn Mower engine not starting or running properly?
- T
  Teresa DanielsNov 27, 2025
  If your Toro Lawn Mower engine is not starting, starts with difficulty, or won't stay running, there are several potential reasons. First, ensure the fuel tank isn't empty and the fuel-shutoff valve is open. Check that the oil level in the crankcase is adequate and the throttle is positioned midway between the SLOW and FAST settings. A dirty fuel filter or contaminated fuel system can also cause these issues, so replace the fuel filter. Also, a dirty air cleaner, a malfunctioning seat switch, corroded electrical connections, a faulty relay or switch, a fouled spark plug, or a disconnected spark-plug wire could be the cause. Clean or replace the air-cleaner element, check the seat-switch indicator and replace the seat if needed, check and clean the electrical connections, adjust or replace ...
M
Michael SmithAug 30, 2025
How to fix uneven cutting height on my Toro 74312?
- A
  Alicia LeAug 31, 2025
  To address an uneven cutting height with your Toro Lawn Mower, begin by sharpening the blade(s) or installing new cutting blade(s). Level the mower deck from side-to-side and front-to-rear, and clean the underside of the mower. Adjust the tire pressure in the drive tires, position the spacers under hairpin cotters, and replace blades/spindles, checking for damage to the mower deck.

Toro 74312 Specifications

General

Model	74312
Engine Displacement	163cc
Deck Material	Steel
Start Type	Recoil
Mulching Capability	Yes
Bagging Capability	Yes
Side Discharge Capability	Yes
Cutting Width	22 inches
Drive Type	Self-propelled
Drive System	Personal Pace
Fuel Tank Capacity	0.25 gallons
Cutting Height	1.0 inches
Wheel Size (front)	8 inches

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