Gravely ZT 915106 - 2550 User Manual (English)

Questions and Answers:

K
Keith WatsonAug 4, 2025
How to troubleshoot starting issues with my Gravely Lawn Mower?
- Q
  qhernandezAug 4, 2025
  If your Gravely Lawn Mower engine won't crank or start, several factors could be at play. First, ensure the safety interlock system is properly engaged and not faulty. Next, check that the fuel tank isn't empty and fill it if necessary. A discharged battery could also be the culprit, so try charging it. Inspect the connections between the battery and cables, tightening them or cleaning away any corrosion if needed. Also, make sure the spark plug wires are securely connected, and the spark plugs aren't faulty; replace them if they are. If these steps don't resolve the issue, there may be a fault in the electrical system or the engine itself, in which case you should contact your Gravely Dealer.
S
Sarah JonesAug 8, 2025
What to do if my Gravely Lawn Mower won't move?
- B
  bwilliamsAug 8, 2025
  If your Gravely Lawn Mower is not moving even when the engine is running and you're using the steering levers, the transmission bypass lever might be engaged; disengage it. Another potential issue is a faulty hydrostatic belt, which would need replacement. If neither of these solutions works, the transmission itself may be faulty, and you should contact your Gravely Dealer.
B
Brooke RichardsonAug 12, 2025
What to do if PTO or mower blades do not engage on my Gravely Lawn Mower?
- E
  Eddie AnthonyAug 13, 2025
  If the PTO or mower blades on your Gravely Lawn Mower won't engage or shut off, there are several things to check. First, make sure the operator presence switch is depressed by sitting on the seat. Also, check if the electric clutch connector is loose or disconnected and connect it. A faulty PTO belt can also cause this issue, so consider replacing it. If none of these steps work, the operator presence switch, PTO switch, wires, connectors, or clutch may be faulty, and you should contact your Gravely Dealer.
W
warrenjackAug 16, 2025
Why does my Gravely ZT 915106 - 2550 Lawn Mower engine run rough?
- M
  mallorybakerAug 16, 2025
  If your Gravely Lawn Mower engine runs rough, it might be due to a few common issues. First, check if the choke is engaged and disengage it. Another possibility is a plugged air filter cartridge, which you should clean or replace. If neither of these steps resolves the problem, the engine itself may be faulty, and you should contact your Gravely Dealer.
S
Samuel MccallAug 21, 2025
Why is my Gravely ZT 915106 - 2550 Lawn Mower engine overheating?
- P
  Patricia HornAug 21, 2025
  If your Gravely Lawn Mower engine overheats, start by checking the engine oil level and adding oil if it's low. Also, the cooling system might be plugged, so clean it. If the problem persists, the engine itself may be faulty, and you should contact your Gravely Dealer.
M
Melvin ChenAug 26, 2025
How to fix a Gravely ZT 915106 - 2550 Lawn Mower that doesn't drive straight?
- D
  Darryl PerryAug 26, 2025
  If your Gravely Lawn Mower does not travel in a straight line, start by checking the tire pressure and adjusting it as needed. If the tire pressure is correct, the steering levers might need adjustment. If the issue persists, the hydrostatic transmission and/or linkage may need adjustment, and you should contact your Gravely Dealer.
J
jenniferreedAug 29, 2025
How to improve the cutting quality of my Gravely ZT 915106 - 2550?
- B
  Brandon MorenoAug 29, 2025
  If you're experiencing poor cutting quality with your Gravely Lawn Mower, it could be due to a couple of factors. First, check if the mower deck is level and the mower pitch is correct, and adjust as necessary. Another common cause is dull or faulty mower blades, which you should sharpen or replace.

Gravely ZT 915106 - 2550 Specifications

General

Engine	Kawasaki FR691V
Engine Displacement	726 cc
Engine Power	23 HP
Deck Type	Fabricated
Weight	850 lbs
Turning Radius	Zero-turn
Speed	8 mph
Cutting Width	50 inches
Cutting Height	1.5 - 4.5 inches

Summary

Product Registration

Safety

Safety Alerts

Explains safety symbols and their meanings for precautions.

Safety Decals and Locations

Safety Rules

Assembly

Check Tire Pressure

Ensures proper inflation to prevent explosive separation of tire and rim parts.

Check Safety Interlock System

Verifies safety interlock functionality to prevent serious injury or death.

Controls and Features

Operation

Safety Interlock System

Tests the safety interlock system for proper operation before each use.

Ignition Switch

Describes the ignition switch positions for starting, running, and stopping the engine.

Choke Control

Explains how to use the choke lever for starting a cold engine.

Throttle Lever

Details the throttle lever functions for controlling engine speed.

Operation

Parking Brake

Explains engagement and disengagement of the parking brake mechanism.

Steering Levers

Details forward, reverse, and turning movements using steering levers.

Mower Lift Pedal

Guides on raising and lowering the mower deck using the pedal.

Filling Fuel Tank

Provides instructions for safely filling the fuel tank.

Operation

Starting and Shutting Off Engine

Step-by-step guide for starting and stopping the engine safely.

Transporting Unit

Safety procedures for transporting the mower on a truck or trailer.

Maintenance Schedule

Check Safety Interlock System

Verifies safety interlock functionality to prevent serious injury or death.

Check Tires

Instructions for checking tire pressure and condition for safe operation.

Check Mower Blades

Procedure for inspecting mower blades for wear or damage.

Maintenance Schedule

Follow Engine Manual Maintenance Schedule

Recommends adhering to the engine manual for scheduled maintenance tasks.

Check Battery Lubricate Unit

Details on checking the battery and lubricating front wheel zerks.

Service and Adjustments

Seat Adjustment

Steps for adjusting the seat position for operator comfort and control.

Mower Deck Removal and Installation

Comprehensive guide for removing and reinstalling the mower deck.

Service and Adjustments

Levelling and Adjusting Pitch of Mower Deck

Steps for leveling the mower deck and adjusting its pitch for optimal cutting.

Service and Adjustments

Adjusting The Mower Deck To Adjust Mower Blade Height And Pitch

How to adjust the mower deck to set blade height and pitch accurately.

Sharpening Mower Blade

Cautionary advice and procedures for sharpening mower blades safely.

Service and Adjustments

Battery Removal and Installation

Step-by-step instructions for removing and installing the unit's battery.

Cleaning Battery and Battery Cables

Guide on cleaning battery terminals and cables for optimal performance.

Service and Adjustments

Charging the Battery

Procedures and safety warnings for charging the unit's battery.

Adjusting Steering Levers

Instructions for adjusting the steering levers for proper tracking and control.

Service and Adjustments

Forward and Reverse Speed Adjustment

How to adjust steering levers to ensure the unit travels straight.

Replacing PTO Belt

Detailed steps for removing and installing the Power Take-Off (PTO) belt.

Service and Adjustments

Replacing Hydrostatic Belt

Step-by-step instructions for removing and installing the hydrostatic drive belt.

Storage

Short Term Storage

Guidelines for cleaning and storing the unit for short periods.

Long Term Storage

Procedures for preparing the unit for extended storage, including fuel and battery care.

Fuel System

Advice on treating the fuel system for storage to prevent deterioration.

Troubleshooting

Engine will not crank/start

Identifies causes and corrections for engine starting issues.

Engine runs rough

Addresses common issues causing the engine to run unevenly.

Troubleshooting

Engine overheats

Explains potential causes and remedies for engine overheating.

Poor cutting quality

Identifies causes and solutions for subpar grass cutting performance.

Service Parts

Accessories

Specifications

Two-Year Limited Lawn and Garden Consumer Ride-On Warranty

Customer Responsibilities

Lists obligations of the customer for warranty service and product registration.

Exceptions, Limitations, Exclusions

Lists conditions and items not covered by the product warranty.

Warranty

Limitation of Remedy and Damages

Defines the limits of Ariens Company's liability under the warranty.

Related product manuals

Gravely ZT 915102 - 2040

32 pages

Gravely ZT 915132 - 2350

Gravely MINI-ZT 915064

28 pages

Gravely ZT 915094 – 2350

28 pages

Gravely 915 Mini-ZT

42 pages

Gravely 991091 ZT HD60

40 pages

Gravely 991084 ZT HD60

40 pages

Gravely 991083 ZT HD52

40 pages

Gravely ZT

30 pages

Gravely ZT 915106 - 2550 User Manual

Table of Contents

Questions and Answers:

Gravely ZT 915106 - 2550 Specifications

Summary

Product Registration

Safety

Safety Alerts

Safety Decals and Locations

Safety Rules

Assembly

Check Tire Pressure

Check Safety Interlock System

Controls and Features

Operation

Safety Interlock System

Ignition Switch

Choke Control

Throttle Lever

Operation

Parking Brake

Steering Levers

Mower Lift Pedal

Filling Fuel Tank

Operation

Starting and Shutting Off Engine

Transporting Unit

Maintenance Schedule

Check Safety Interlock System

Check Tires

Check Mower Blades

Maintenance Schedule

Follow Engine Manual Maintenance Schedule

Check Battery Lubricate Unit

Service and Adjustments

Seat Adjustment

Mower Deck Removal and Installation

Service and Adjustments

Levelling and Adjusting Pitch of Mower Deck

Service and Adjustments

Adjusting The Mower Deck To Adjust Mower Blade Height And Pitch

Sharpening Mower Blade

Service and Adjustments

Battery Removal and Installation

Cleaning Battery and Battery Cables

Service and Adjustments

Charging the Battery

Adjusting Steering Levers

Service and Adjustments

Forward and Reverse Speed Adjustment

Replacing PTO Belt

Service and Adjustments

Replacing Hydrostatic Belt

Storage

Short Term Storage

Long Term Storage

Fuel System

Troubleshooting

Engine will not crank/start

Engine runs rough

Troubleshooting

Engine overheats

Poor cutting quality

Service Parts

Accessories

Specifications

Two-Year Limited Lawn and Garden Consumer Ride-On Warranty

Customer Responsibilities

Exceptions, Limitations, Exclusions

Warranty

Limitation of Remedy and Damages

Related product manuals