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MTD Yard-Man AutoDrive 604 - User Manual

MTD Yard-Man AutoDrive 604
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OPERATOR’S MANUAL
IMPORTANT: READ SAFETY RULES AND INSTRUCTIONS CAREFULLY
MTD PRODUCTS INC. P.O. BOX 368022 CLEVELAND, OHIO 44136-9722
PRINTED IN U.S.A. FORM NO. 770-10235B
Warning:
This unit is equipped with an internal combustion engine and should not be used on or near any unimproved forest-
covered, brush-covered or grass-covered land unless the engine’s exhaust system is equipped with a spark arrester meeting
applicable local or state laws (if any). If a spark arrester is used, it should be maintained in effective working order by the operator.
In the State of California the above is required by law (Section 4442 of the California Public Resources Code). Other states may have
similar laws. Federal laws apply on federal lands. A spark arrester for the muffler is available through your nearest engine authorized
service dealer or contact the service department, P.O. Box 368022 Cleveland, Ohio 44136-9722.
(10/99)
AutoDrive
™
Lawn Tractor
Model 604
Model U604H Shown

Table of Contents

Questions and Answers

  • A
    Adam McclureAug 5, 2025
    What to do if MTD Yard-Man AutoDrive 604 Lawn Mower engine cranks but will not start?
    • R
      Regina PetersonAug 5, 2025
      If your MTD Lawn Mower engine cranks but doesn't start, several factors could be responsible. First, check that the throttle or choke is in the correct starting position, referring to the OPERATION section of this manual. Ensure that the gasoline tank is filled. A plugged fuel line or in-line fuel filter can also prevent starting; remove and clean the fuel line, and replace the fuel filter if necessary. Check that the spark plug lead is connected and test for spark. If no spark is present, have the engine’s magneto serviced by an authorized engine dealer.
  • I
    icowanAug 11, 2025
    How to fix MTD Lawn Mower that won’t discharge grass or leaves uncut strips?
    • S
      Shawn MercadoAug 11, 2025
      If your MTD Lawn Mower isn’t discharging grass properly or leaves uncut strips, several adjustments can help. Ensure the throttle is set to full. Reduce your ground speed for a better cut quality. Raise the cutting deck. If uncut strips are the issue, sharpen or replace the blades.
  • J
    Jacob MosleyAug 16, 2025
    Why MTD Yard-Man AutoDrive 604 Lawn Mower engine smokes?
    • S
      Sarah DorseyAug 17, 2025
      An MTD Lawn Mower engine may smoke due to several reasons. The engine oil might be overfilled, so check the oil level. The engine might be losing crankcase vacuum because the dipstick is not seated or is broken, in which case you should replace the defective part. Also, the engine breather might be defective and needs replacement.
  • A
    Andrew PowersAug 23, 2025
    What to do if MTD Lawn Mower has excessive vibration?
    • S
      Suzanne FlynnAug 25, 2025
      If your MTD Lawn Mower has excessive vibration, stop the engine immediately. Inspect all pulleys, blade adapters, keys, and bolts for tightness and check for any spindle damage. Tighten or replace any loose or damaged parts.
  • C
    Chelsea FowlerOct 29, 2025
    Why MTD Yard-Man AutoDrive 604 Lawn Mower engine will not crank?
    • S
      Stephen ThomasOct 29, 2025
      The MTD Lawn Mower engine might not crank due to several reasons. It could be that the safety switch button is not fully depressed by the actuator on the brake control assembly. Another cause might be incorrect battery installation; ensure the negative terminal (marked with “NEG”, “N” or “-”) is connected to the black ground wire and the positive terminal (marked with “POS”, “P” or “+”) is connected to the thick red wire going to the solenoid. A dead or weak battery could also be the culprit, requiring a charge at six amps with a 12-volt automotive-type battery charger for one hour or until fully charged. Finally, a blown fuse or loose connections in the fuse holder may be the problem. Replace the fuse with an automotive type fuse of the proper amperage, or replace the fuse holder if neces...

Summary

Operators Manual Overview and Safety

Finding Model Information and Customer Support

Locate model/serial numbers and contact customer support.

Essential Safety Rules and Practices

Comprehensive safety guidelines for operation, slopes, children, and service.

Using the Slope Gauge

Guide to determine safe operating slopes.

Tractor Setup, Controls, and Operation

Tractor Setup and Attachments

Initial setup, battery connection, and available attachments.

Understanding Tractor Controls

Detailed overview of all control levers, buttons, and pedals.

Operating Procedures

Procedures for starting, driving, stopping, mowing, and using the PTO.

Maintenance, Adjustments, and Troubleshooting

Adjusting the Cutting Deck and Tractor Components

Procedures for deck leveling, steering, brakes, and seat adjustment.

Routine Maintenance and Lubrication

Steps for engine oil, cleaning, belt changes, and lubrication.

Troubleshooting Common Issues

Guide to diagnose and resolve tractor problems.

Component Details and Warranty

Cutting Deck Component Information

Part diagrams and lists for cutting decks.

Manufacturers Limited Warranty

Warranty terms, coverage, and limitations.

MTD Yard-Man AutoDrive 604 Specifications

General IconGeneral
EngineBriggs & Stratton
Engine Displacement190cc
Drive SystemAutoDrive
Cutting Width21 inches
Engine Type4-Cycle
Fuel Tank Capacity1.5 quarts
Wheel Size (Front)8 inches
Wheel Size (Rear)11 inches
Mulching CapabilityYes
Bagging CapabilityYes
Side Discharge CapabilityYes
Cutting Height1.25-3.75 inches

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