Columbia 79G - User Manual

Questions and Answers

L
Lisa PhamAug 16, 2025
What to do if Columbia Lawn Mower engine runs erratic?
- J
  Jeremy OrrAug 16, 2025
  If your Columbia Lawn Mower engine runs erratically, it might be due to the unit running with the CHOKE activated, loose spark plug wires, a blocked fuel line or stale fuel, a plugged vent in the gas cap, water or dirt in the fuel system, or a dirty air cleaner. Try moving the throttle control out of the CHOKE position, connecting and tightening the spark plug wire, cleaning the fuel line and filling the tank with clean, fresh gasoline (replacing the fuel filter if equipped), clearing the vent or replacing the cap if damaged, draining the fuel tank and refilling with clean, fresh gasoline, or replacing the air cleaner paper element or cleaning the foam precleaner (if equipped).
B
Bryan BanksAug 20, 2025
Why Columbia 79G engine overheats?
- E
  Evan WilliamsAug 20, 2025
  Your Columbia Lawn Mower engine may overheat if the engine oil level is low, or if the airflow is restricted. To resolve this, fill the crankcase with the proper amount and weight of oil. Also, clean any grass clippings and debris from around the engine’s cooling fins and blower housing.
R
Richard YorkAug 25, 2025
What to do if Columbia 79G Lawn Mower has excessive vibration?
- J
  John MitchellAug 25, 2025
  Excessive vibration in your Columbia Lawn Mower can be caused by a cutting blade that is loose or unbalanced, or a damaged or bent cutting blade. You should tighten the blade and spindle, and balance the blade. If the blade is damaged, replace it.
J
Jessica MillerAug 27, 2025
Why Columbia Lawn Mower engine idles rough?
- D
  David HodgesAug 27, 2025
  A rough idle in your Columbia Lawn Mower engine can be due to a spark plug that is fouled, faulty, or has a gap that is too wide, or a dirty air cleaner. Replace the spark plug and set the plug gap. Replace the air cleaner element and/or clean the pre-cleaner, if your mower is equipped with one.
T
Theresa FowlerAug 31, 2025
How to fix uneven cut with Columbia Lawn Mower?
- R
  rrochaAug 31, 2025
  An uneven cut with your Columbia Lawn Mower may be due to a deck that is not leveled properly, a dull blade, or uneven tire pressure. Perform a side-to-side deck adjustment. Sharpen or replace the blade. Check the tire pressure in all four tires.
F
fjohnsonSep 4, 2025
What to do if Columbia Lawn Mower will not mulch grass?
- F
  fernandezkatelynSep 4, 2025
  If your Columbia Lawn Mower won't mulch grass, the engine speed may be too low, the grass may be wet, the grass may be excessively high, or the blade may be dull. Place the throttle in the FAST (rabbit) position. Avoid mulching when the grass is wet. If the grass is excessively high, mow once at a high cutting height, then mow again at the desired height or make a narrower cutting swath. Sharpen or replace the blade.
K
Kelly RushSep 7, 2025
Why Columbia Lawn Mower engine hesitates at high RPM?
- Z
  zlopezSep 8, 2025
  If your Columbia Lawn Mower engine hesitates at high RPM, it could be because the spark plug gap is too close. Remove the spark plug and reset the gap.
A
Alyssa JacksonNov 11, 2025
Why Columbia 79G Lawn Mower engine fails to start?
- C
  carla11Nov 11, 2025
  Your Columbia Lawn Mower engine might fail to start due to several reasons. It could be because the PTO/Blade is engaged, the spark plug wire is disconnected, the fuel tank is empty or contains stale fuel, the choke is not activated, the spark plug is faulty, the fuel line is blocked, the engine is flooded, the parking brake is not engaged, or the throttle control lever is not in the correct starting position. Make sure the knob (or lever) is in disengaged (OFF) position, connect the wire to the spark plug, fill the tank with clean, fresh gas (less than 30 days old), place the throttle control in CHOKE position, clean/adjust/replace the spark plug, clean the fuel line and replace the fuel filter, crank the engine with the throttle in FAST position, engage the parking brake, and place the t...

Summary

Important Safe Operation Practices

Slope Operation

Precautions and guidelines for safely operating the tractor on slopes, including angle limits and turning.

Children Safety

Safety precautions concerning children around the operating mower.

Towing Safety

Assembly & Set-Up

Connecting the Battery Cables

Step-by-step instructions for connecting the tractor's battery cables safely.

Shipping Brace Removal

Instructions and warnings for removing the shipping brace before operation.

Attaching Steering Wheel and Seat

Setting Deck Gauge Wheels

Controls and Features

Key Control Levers and Pedals

Ignition Switch Module

Throttle and Choke Operation

Ignition Switch Types

Covers 3-position and 4-position ignition switches and their operational differences.

Speed, Brake, and Parking Controls

PTO and Deck Lift Controls

Operation

Safety Interlock Switches

Explanation of the safety interlock system and its role in preventing unintended starting.

Reverse Caution Mode Operation

Instructions for using reverse caution mode, with warnings about mowing in reverse.

Starting the Engine

Detailed instructions for starting the tractor's engine safely, considering interlocks.

Driving The Tractor

Guidelines for operating the tractor, including speed control and safe driving practices.

Engaging Blades and Deck Lift

Procedure for engaging the PTO to power the cutting deck and using the deck lift lever.

Mowing Best Practices

Tips and warnings for effective and safe lawn mowing practices.

Maintenance & Adjustments

Engine Oil and Filter Change

Detailed steps for changing engine oil and filter for different engine models.

Deck Wash System and Leveling

Deck Side-to-Side Adjustment

Maintenance Schedule

Service

Cutting Deck Removal

Detailed steps for removing the mower deck from the tractor.

Jump Starting and Charging

Cutting Blades Maintenance

Instructions for removing, sharpening, and balancing cutting blades.

Changing Deck and Drive Belts

Troubleshooting

Engine Starting and Running Issues

Performance and Cut Quality Issues

Attachments & Accessories

Replacement Parts

Summary

Important Safe Operation Practices

Slope Operation

Precautions and guidelines for safely operating the tractor on slopes, including angle limits and turning.

Children Safety

Safety precautions concerning children around the operating mower.

Towing Safety

Assembly & Set-Up

Connecting the Battery Cables

Step-by-step instructions for connecting the tractor's battery cables safely.

Shipping Brace Removal

Instructions and warnings for removing the shipping brace before operation.

Attaching Steering Wheel and Seat

Setting Deck Gauge Wheels

Controls and Features

Key Control Levers and Pedals

Ignition Switch Module

Throttle and Choke Operation

Ignition Switch Types

Covers 3-position and 4-position ignition switches and their operational differences.

Speed, Brake, and Parking Controls

PTO and Deck Lift Controls

Operation

Safety Interlock Switches

Explanation of the safety interlock system and its role in preventing unintended starting.

Reverse Caution Mode Operation

Instructions for using reverse caution mode, with warnings about mowing in reverse.

Starting the Engine

Detailed instructions for starting the tractor's engine safely, considering interlocks.

Driving The Tractor

Guidelines for operating the tractor, including speed control and safe driving practices.

Engaging Blades and Deck Lift

Procedure for engaging the PTO to power the cutting deck and using the deck lift lever.

Mowing Best Practices

Tips and warnings for effective and safe lawn mowing practices.

Maintenance & Adjustments

Engine Oil and Filter Change

Detailed steps for changing engine oil and filter for different engine models.

Deck Wash System and Leveling

Deck Side-to-Side Adjustment

Maintenance Schedule

Service

Cutting Deck Removal

Detailed steps for removing the mower deck from the tractor.

Jump Starting and Charging

Cutting Blades Maintenance

Instructions for removing, sharpening, and balancing cutting blades.

Changing Deck and Drive Belts

Troubleshooting

Engine Starting and Running Issues

Performance and Cut Quality Issues

Attachments & Accessories

Replacement Parts

Columbia 79G Specifications

General

Brand	Columbia
Model	79G
Category	Lawn Mower
Language	English

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36 pages

Columbia 79G - User Manual

Table of Contents

Questions and Answers

Summary

Important Safe Operation Practices

Slope Operation

Children Safety

Towing Safety

Assembly & Set-Up

Connecting the Battery Cables

Shipping Brace Removal

Attaching Steering Wheel and Seat

Setting Deck Gauge Wheels

Controls and Features

Key Control Levers and Pedals

Ignition Switch Module

Throttle and Choke Operation

Ignition Switch Types

Speed, Brake, and Parking Controls

PTO and Deck Lift Controls

Operation

Safety Interlock Switches

Reverse Caution Mode Operation

Starting the Engine

Driving The Tractor

Engaging Blades and Deck Lift

Mowing Best Practices

Maintenance & Adjustments

Engine Oil and Filter Change

Deck Wash System and Leveling

Deck Side-to-Side Adjustment

Maintenance Schedule

Service

Cutting Deck Removal

Jump Starting and Charging

Cutting Blades Maintenance

Changing Deck and Drive Belts

Troubleshooting

Engine Starting and Running Issues

Performance and Cut Quality Issues

Attachments & Accessories

Replacement Parts

Summary

Important Safe Operation Practices

Slope Operation

Children Safety

Towing Safety

Assembly & Set-Up

Connecting the Battery Cables

Shipping Brace Removal

Attaching Steering Wheel and Seat

Setting Deck Gauge Wheels

Controls and Features

Key Control Levers and Pedals

Ignition Switch Module

Throttle and Choke Operation

Ignition Switch Types

Speed, Brake, and Parking Controls

PTO and Deck Lift Controls

Operation

Safety Interlock Switches

Reverse Caution Mode Operation

Starting the Engine

Driving The Tractor

Engaging Blades and Deck Lift

Mowing Best Practices

Maintenance & Adjustments

Engine Oil and Filter Change

Deck Wash System and Leveling

Deck Side-to-Side Adjustment

Maintenance Schedule

Service

Cutting Deck Removal

Jump Starting and Charging

Cutting Blades Maintenance

Changing Deck and Drive Belts

Troubleshooting

Engine Starting and Running Issues

Performance and Cut Quality Issues

Attachments & Accessories