Gravely ZT34 CARB User Manual

Gravely ZT34 CARB

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Owner/Operator Manual

Manuel Du Propriétaire/Utilisateur

Models

915146 – ZT34

915148 – ZT42

915150 – ZT50

915168 – ZT34 CARB

915170 – ZT42 CARB

ZT

™

04012600B 1/11

Printed in USA

ENGLISH

FRANÇAIS

Gasoline containing up to 10% ethanol (E10) or up to 10% MTBE (methyl tertiary butyl ether) is

acceptable for use in this machine.

The use of any gasoline exceeding 10% ethanol (E10) or 10% MTBE will void the product

warranty.

Il est possible d’utiliser de l’essence contenant jusqu’à 10% d’éthanol (E10) ou 10% de MTBE

(éther méthyl-tertiobutylique) sur cette machine.

L’utilisation d’une essence contenant plus de 10% d’éthanol (E10) ou de 10% de MTBE

annulent la garantie.

Questions and Answers:

M
Michael RiceAug 13, 2025
Why won't my Gravely ZT34 CARB engine crank or start?
- A
  Annette Sullivan DDSAug 13, 2025
  There are several reasons why your Gravely Lawn Mower engine might fail to crank or start: * The safety interlock system might not be engaged or could be faulty. Check the safety interlock system. * The fuel tank could be empty. Refill the fuel tank. * The battery might be discharged. Charge the battery. * There might be a poor connection between the battery and battery cables. Tighten the battery cables and/or clean the battery and battery cables. * The spark plug wire(s) might be loose, or the spark plug(s) might be faulty. Connect the spark plug wire(s) or replace the spark plug(s). * There may be a faulty electrical system or engine. In these cases, it is recommended to contact your Gravely Dealer.
T
Tracy Esparza DVMAug 16, 2025
What to do if my Gravely ZT34 CARB unit does not move with engine running when using steering levers?
- L
  Lawrence AndrewsAug 17, 2025
  If your Gravely Lawn Mower doesn't move when using the steering levers while the engine is running, consider the following: * The transmission bypass lever may be engaged. Disengage the transmission bypass lever. * The hydrostatic belt could be faulty. Replace the hydrostatic belt. * If neither of these solutions works, there may be a faulty transmission. In this case, it is recommended to contact your Gravely Dealer.
K
Kristen PerezAug 20, 2025
What causes my Gravely ZT34 CARB Lawn Mower unit to creep with steering levers in neutral position?
- C
  Crystal SalinasAug 21, 2025
  If your Gravely Lawn Mower creeps forward even when the steering levers are in the neutral position, it indicates that the hydrostatic transmission and/or linkage needs adjustment. In this case, it is recommended to contact your Gravely Dealer.
M
Michael NixonAug 25, 2025
What to do if my Gravely Lawn Mower PTO or mower blades do not engage or shut off?
- A
  Andrea CookAug 25, 2025
  If the PTO or mower blades on your Gravely Lawn Mower fail to engage or shut off, consider these potential causes: * Ensure the operator presence switch is depressed by sitting on the seat. * A faulty operator presence switch, PTO belt, PTO switch, wires, connectors, or clutch could be the problem. It is recommended to contact your Gravely Dealer to resolve these issues, or replace the PTO belt.
J
Jessica LeonardAug 28, 2025
Why is my Gravely ZT34 CARB Lawn Mower engine running rough?
- J
  Jason RichardsAug 28, 2025
  A rough-running engine on your Gravely Lawn Mower can stem from a few issues: * The choke might be engaged. Disengage the choke. * The air filter cartridge could be plugged. Clean or replace the air filter cartridge. * If these steps don't resolve the issue, there may be a faulty engine. In this case, it is recommended to contact your Gravely Dealer.
A
arielloveSep 1, 2025
Why does my Gravely ZT34 CARB Lawn Mower engine overheat?
- S
  Sarah BellSep 1, 2025
  If your Gravely Lawn Mower engine is overheating, check the following: * The engine oil level may be low. Add engine oil. * The cooling system could be plugged. Clean the cooling system. * If these steps don't resolve the issue, there may be a faulty engine. In this case, it is recommended to contact your Gravely Dealer.
E
Evelyn PalmerSep 4, 2025
How to improve cutting quality of my Gravely ZT34 CARB?
- K
  katieyoungSep 4, 2025
  To improve the cutting quality of your Gravely Lawn Mower: * Ensure the mower deck is level and the mower pitch is correct. Level and adjust the pitch of the mower deck. * Check the mower blades. Sharpen dull blades or replace faulty ones.
D
Daniel LeachSep 8, 2025
Why my Gravely ZT34 CARB Lawn Mower unit does not travel in a straight line?
- A
  Abigail JenningsSep 8, 2025
  If your Gravely Lawn Mower isn't traveling in a straight line, here are a few things to check: * Incorrect tire pressure can cause this issue. Check the tire pressure. * The steering levers may need adjustment. Adjust the steering levers. * If the problem persists, the hydrostatic transmission and/or linkage may need adjustment. In this case, it is recommended to contact your Gravely Dealer.

Gravely ZT34 CARB Specifications

General

Cutting Width	34 inches
Deck Construction	Fabricated
Cutting Height	1.5 - 4.5 inches
Deck Material	Steel
Warranty	3 years

Summary

Introduction and Setup

Delivery and Assembly Preparation

Customer responsibilities for assembly and pre-operation checks.

Safety Guidelines

General Safety Warnings and Alerts

Explains safety alert symbols and general hazards.

Specific Safety Precautions

Detailed safety instructions for operation, including hazard avoidance.

Assembly Procedures

Unit Unpacking and Battery Connection

Steps for unpacking the unit and connecting the battery.

Pre-Operation Checks

Tire Pressure and Deck Leveling

Fueling and Safety Interlock Checks

Instructions for fueling and verifying the safety interlock system.

Control Function Verification

Controls and Features

Operator Controls Overview

Operation and Performance

Basic Operation and Safety

Starting, stopping, and safe operation of the mower.

Fuel Handling and Gasoline Guidelines

Emergency Procedures and Transport

Actions for emergencies and safe unit transportation.

Maintenance and Service

Maintenance Schedule

Recommended service tasks based on usage intervals.

Service and Adjustments Overview

Mower Deck Service

Mower Blade Service

Battery Service

Steering and Belt Service

Steering Lever Adjustments

Belt Replacement Procedures

Troubleshooting and Storage

Troubleshooting Engine Start Issues

Common causes and corrections for engine crank/start problems.

Troubleshooting Operational Issues

Solutions for common unit movement, PTO, and cutting quality problems.

Parts, Accessories, and Specifications

Technical Specifications

Warranty Information

General Consumer Warranty

Evaporative Emission Control Warranty

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