Toro 74399 User Manual

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G005059

1

2

1

2

Figure13

1.Controlpanel2.Bladecontrolswitch—On

position

DisengagingtheBlades

Pushdownonthebladecontrolswitchtomoveitto

theOffpositionanddisengagetheblades(Figure14).

1

2

G005056

1

2

Figure14

1.Controlpanel2.Bladecontrolswitch—Off

StoppingtheEngine

1.Disengagethebladesbymovingthebladecontrol

switchtoOff(Figure14).

2.MovethethrottlelevertobetweenFastandhalf

throttle(Figure12).

3.TurntheignitionkeytoOff(Figure11)andremove

thekey.

TheSafetyInterlockSystem

Ifsafetyinterlockswitchesaredisconnected

ordamagedthemachinecouldoperate

unexpectedlycausingpersonalinjury.

•Donottamperwiththeinterlockswitches.

•Checktheoperationoftheinterlock

switchesdailyandreplaceanydamaged

switchesbeforeoperatingthemachine.

UnderstandingtheSafetyInterlock

System

Thesafetyinterlocksystemisdesignedtopreventthe

enginefromstartingunless:

•Thebladesaredisengaged.

•Themotioncontrolleversareintheparkposition.

Thesafetyinterlocksystemalsoisdesignedtostop

theenginewhenthecontrolleversareoutofthepark

positionandyourisefromtheseatwhentheblades

areengaged.

TestingtheSafetyInterlockSystem

Testthesafetyinterlocksystembeforeyouusethe

machineeachtime.Ifthesafetysystemdoesnot

operateasdescribedbelow,haveanAuthorizedService

Dealerrepairthesafetysystemimmediately.

1.Whilesittingontheseat,withthecontrolleversin

parkposition,andmovethebladecontrolswitch

toOn.Trystartingtheengine;theengineshould

notcrank.

2.Whilesittingontheseat,movethebladecontrol

switchtoOff.Moveeithermotioncontrollever

tothecenter,unlockedposition.Trystartingthe

engine;theengineshouldnotcrank.Repeatwith

theothermotioncontrollever.

3.Whilesittingontheseat,movethebladecontrol

switchtoOff,andlockthemotioncontrolleversin

theparkposition.Starttheengine.Whiletheengine

isrunning,engagethebladecontrolswitch,andrise

slightlyfromtheseat;theengineshouldstop.

4.Whilesittingontheseat,movethebladecontrol

switchtoOff,andlockthemotioncontrollevers

intheparkposition.Starttheengine.Whilethe

engineisrunning,movethemotioncontrollevers

tothecenter,unlockedposition,engagetheblade

controlswitch,andriseslightlyfromtheseat;the

engineshouldstop.

18

Table of Contents

Questions and Answers:

E
Elizabeth WilliamsAug 8, 2025
Why won't my Toro Lawn Mower engine start?
- B
  Brian WilsonAug 8, 2025
  Your Toro Lawn Mower engine might not start due to several reasons. The fuel tank could be empty, so you should fill it. The choke might not be on; move the choke lever to the 'On' position. A dirty air cleaner can also cause this, so clean or replace the air cleaner element. Check if the spark plug wire(s) is loose or disconnected and install it 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 could be dirt in the fuel filter, so replace the fuel filter. Also, ensure you're using the correct fuel type; if not, drain the tank and replace it with the proper fuel. Finally, check the oil level in the crankcase and add oil if it's low.
J
Joe JonesAug 12, 2025
What to do if Toro 74399 Lawn Mower blades do not rotate?
- J
  John DuncanAug 12, 2025
  If the blades on your Toro Lawn Mower aren't rotating, the drive belt might be worn, loose, or broken, so install a new drive belt. Alternatively, 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. Another possibility is that the mower belt is worn, loose, or broken, so install a new mower belt.
G
greenrickeyAug 16, 2025
How to fix Toro Lawn Mower engine overheating?
- D
  dthomasAug 17, 2025
  If your Toro Lawn Mower engine is overheating, several factors could be responsible. First, the engine load might be excessive, so reduce your ground speed. Second, check the oil level in the crankcase and add oil if it's low. Third, inspect the cooling fins and air passages under the engine blower housing for any obstructions and remove them. Fourth, examine the air cleaner; if it's dirty, clean or replace the air cleaner element.
A
Andrew BoothAug 21, 2025
Why is my Toro Lawn Mower engine losing power?
- A
  Amy KellyAug 21, 2025
  Your Toro Lawn Mower engine may be losing power due to several reasons. The engine load could be excessive, so reduce your ground speed. A dirty air cleaner can restrict airflow, so clean the air cleaner element. Check the oil level in the crankcase and add oil if it is low. Make sure that the cooling fins and air passages under the engine blower housing are free of obstructions. If the spark plug(s) is pitted, fouled, or the gap is incorrect, install a new, correctly gapped spark plug(s). The vent in the fuel cap may be closed, so open it. If there is dirt in the fuel filter, replace the fuel filter. Finally, ensure you're using the correct fuel type; if not, drain the tank and replace it with the proper fuel.

Toro 74399 Specifications

General

Deck Material	Steel
Engine	Briggs & Stratton
Cutting Width	22 inches
Drive System	Rear-wheel drive
Start Type	Recoil
Fuel Tank Capacity	0.95 L
Oil Capacity	20 oz
Warranty	2 years

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