Toro 22178 User Manual

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FormNo.3360-491RevA

21inHeavy-DutyRearBagger

LawnMower

ModelNo.22178—SerialNo.260004001andUp

Registeratwww.Toro.com.OriginalInstructions(EN)

Table of Contents

Questions and Answers:

S
Stephanie ChangAug 1, 2025
How to start Toro 22178 Lawn Mower when engine does not start?
- H
  Heather JacksonAug 1, 2025
  If your Toro Lawn Mower engine isn't starting, several factors could be at play. First, ensure your fuel tank isn't empty and that you're using fresh gasoline. If stale fuel is the issue, drain the tank and refill it. Also, make sure the throttle lever is in the Choke position. Check that the wire is securely connected to the spark plug. Finally, inspect the spark plug itself; if it's pitted, fouled, or has an incorrect gap, adjust the gap or replace the spark plug.
J
jphelpsAug 6, 2025
What to do if Toro 22178 does not self-propel?
- M
  Mitchell WuAug 6, 2025
  If your Toro Lawn Mower is not self-propelling, the self-propel drive cable may be out of adjustment or damaged; adjust or replace it as necessary. Also, check for and remove any debris under the belt cover.
S
Sandra YuAug 11, 2025
Why does my Toro Lawn Mower engine start hard or lose power?
- K
  kimberlykingAug 11, 2025
  If your Toro Lawn Mower engine starts hard or loses power, begin by draining and refilling the fuel tank with fresh gasoline. Check if the fuel cap vent hole is plugged and clean it, or replace the cap if needed. A dirty air filter can also cause this issue, so clean the air filter pre-cleaner and/or replace the paper air filter. Additionally, clean any clippings and debris from the underside of the mower housing. Inspect the spark plug for pitting, fouling, or incorrect gap, adjusting or replacing it as necessary. Finally, check the engine oil level and change the oil if it's dirty or low.
K
Kimberly RamirezAug 16, 2025
Why is my Toro 22178 Lawn Mower engine running rough?
- B
  Brandon MontesAug 16, 2025
  A rough-running engine in your Toro Lawn Mower could be due to a few things. First, ensure the wire is securely connected to the spark plug. Inspect the spark plug itself; if it's pitted, fouled, or has an incorrect gap, adjust the gap or replace the spark plug. Also, make sure the throttle lever is in the Fast position. Lastly, check the air filter; if it's dirty, clean the air filter pre-cleaner and/or replace the paper air filter.
S
scott65Aug 21, 2025
What to do if Toro 22178 Lawn Mower or engine vibrates excessively?
- A
  Amanda SantosAug 21, 2025
  Excessive vibration in your Toro Lawn Mower can stem from several causes. Check the blade to see if it's bent or out of balance; balance it or replace it if bent. Ensure the blade mounting nuts are tightened properly. Clean any clippings and debris from the underside of the mower housing. Finally, make sure the engine mounting bolts are securely tightened.
K
keithoconnorAug 26, 2025
How to fix uneven cutting pattern with Toro Lawn Mower?
- M
  Mary OconnorAug 27, 2025
  An uneven cutting pattern with your Toro Lawn Mower can result from several factors. Ensure all four wheels are at the same height. Check if the blade is dull and sharpen and balance it. Avoid mowing in the same pattern repeatedly, and clean any clippings and debris from the underside of the mower housing.

Toro 22178 Specifications

General

Engine Type	4-Cycle
Starter Type	Recoil
Deck Material	Steel
Height Adjustment	Single lever
Drive System	Rear Wheel Drive
Cutting Height	1.25 - 3.75 in (3.2 - 9.5 cm)
Self-Propelled	Yes
Weight	80 lbs
Engine	Briggs & Stratton
Wheel Size	8 inches
Cutting Width	22 inches
Start Type	Pull Cord

Summary

Safety Information

General Lawn Mower Safety

Crucial safety instructions to prevent injury and property damage during mower operation.

Setup

Filling the Crankcase with Oil

Procedure for adding the correct amount of oil to the engine crankcase before operation.

Operation

Checking Engine Oil Level

Procedure to verify the engine oil level is within the recommended range before starting.

Filling Fuel Tank with Gasoline

Guidelines for safely filling the fuel tank with the correct type of gasoline.

Engine Starting and Stopping

Starting the Engine

Step-by-step instructions for safely starting the lawn mower engine.

Stopping the Engine

Mower Operation

Operating the Blade

How to engage and disengage the mower blade for cutting operations.

Operating the Traction Drive

Instructions for engaging and disengaging the self-propel feature.

Blade Brake Clutch and Height Adjustment

Checking the Blade Brake Clutch

Ensuring the blade brake clutch system functions correctly before each use.

Adjusting the Cutting Height

Cutting Techniques

Cutting Grass

Maintenance Schedule and Lubrication

Recommended Maintenance Schedule

Overview of scheduled maintenance tasks and their service intervals for the mower.

Engine Maintenance

Servicing the Air Filter

Steps for cleaning or replacing the engine's air filter for optimal performance.

Oil and Filter Maintenance

Changing the Engine Oil

Detailed instructions for draining and refilling the engine oil.

Changing the Oil Filter

Spark Plug Maintenance

Servicing the Spark Plug

System Maintenance

Fuel System Maintenance

Drive System Maintenance

Controls and Wheel Assembly

Controls System Maintenance

Blade Maintenance

Maintaining the Cutting Blade

Instructions for inspecting, sharpening, and balancing the mower blade.

Inspecting the Blade

Sharpening the Blade

Blade Balancing and Installation

Balancing the Blade

Installing the Blade

Troubleshooting

Engine Starting Problems

Troubleshooting steps for an engine that fails to start or runs rough.

Performance and Cutting Issues

Self-Propel Problems

Troubleshooting for issues where the mower's self-propel function is not working.

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