MTD 604H manual Troubleshooting, Trouble Possible Causes Corrective Action

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SECTION 8: TROUBLESHOOTING

Trouble

Possible Cause(s)

Corrective Action

 

 

 

 

 

Engine fails to start

1.

PTO lever/knob engaged.

1.

Place PTO lever/knob in OFF position.

 

2.

Parking brake not engaged.

2.

Engage parking brake.

 

3.

Spark plug wire(s) disconnected.

3.

Connect wire(s) to spark plug.

 

4.

Throttle control lever not in correct

4.

Place throttle lever to CHOKE position.

 

 

starting position.

 

 

 

5.

Fuel tank empty, or stale fuel.

5.

Fill tank with clean, fresh gas.

 

6.

Blocked fuel line.

6.

Clean fuel line or replace fuel filter, if so

 

 

 

 

equipped.

 

7.

Faulty spark plug.

7.

Clean, adjust gap or replace plug.

 

8.

Engine flooded.

8.

Crank engine with throttle in FAST position.

 

 

 

 

 

Engine runs erratic

1.

Unit running with CHOKE applied.

1.

Place throttle lever in FAST position.

 

2.

Spark plug wire loose.

2.

Connect and tighten spark plug wire.

 

3.

Blocked fuel line or stale fuel.

3.

Clean fuel line; fill tank with clean, fresh gas.

 

 

 

 

Replace fuel filter, if so equipped.

 

4.

Vent in gas cap plugged.

4.

Clear vent or replace cap if damaged.

 

5.

Water or dirt in fuel system.

5.

Drain fuel tank. Refill with clean, fresh gas.

 

6.

Dirty air cleaner.

6.

Replace air cleaner cartridge or clean pre-

 

 

 

 

cleaner, if so equipped.

 

 

 

 

 

Engine overheats

1.

Engine oil level low.

1.

Fill crankcase with proper capacity and weight of

 

 

 

 

oil.

 

2.

Air flow restricted.

2.

Clean grass clippings and debris from around the

 

 

 

 

engine’s cooling fins and blower housing.

 

 

 

 

 

Engine hesitates at high

1.

Spark plug gap too close.

1.

Remove spark plug(s) and reset the gap at .030”.

RPM

 

 

 

 

 

 

 

 

 

Idles poorly

1.

Spark plug fouled, faulty or gap too

1.

Replace spark plug(s). Set plug gap at .030”.

 

 

wide.

 

 

 

2.

Dirty air cleaner.

2.

Replace air cleaner cartridge or clean pre-

 

 

 

 

cleaner, if so equipped.

 

 

 

 

 

Excessive vibration

1.

Cutting blade loose, unbalanced or

1.

Tighten blade and spindle, balance blade and/or

 

 

damaged.

 

replace blade.

 

 

 

 

 

Mower will not mulch

1.

Engine speed too low.

1.

Place throttle in FAST (rabbit) position.

grass

2.

Wet grass.

2.

Do not mow when grass is wet; wait until later to

 

 

 

 

cut.

 

3.

Excessively high grass.

3.

Mow once at a high cutting height, then mow

 

 

 

 

again at desired height or make a narrower

 

 

 

 

cutting swath.

 

4.

Dull blade.

4.

Sharpen or replace blade.

 

 

 

 

 

Uneven cut

1.

Deck not balanced properly.

1.

Perform side-to-side deck adjustment.

 

2.

Dull blade.

2.

Sharpen or replace blade.

 

3.

Uneven tire pressure.

3.

Check tire pressure in all four tires.

 

 

 

 

 

NOTE: For unsolved problems and/or further details, visit www.mtdproducts.com or call the Customer Support Line at 1-800-800-7310.

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Contents Operator’s Manual Table of Contents General Operation Important Safe Operation PracticesSlope Operation ServiceChildren TowingGeneral Your ResponsibilitySlope Gauge Tractor SET-UP Attaching the Battery CablesAttaching The Steering Wheel Attaching The SeatRemove Shipping Brace Gas and Oil Fill-UpKnow the Controls OperationThrottle Control Lever Ignition SwitchChoke Control Brake PedalHeadlights Systems Indicator Monitor / Hour MeterShift Lever Cruise Control ButtonSeat Adjustment Lever Safety Interlock SwitchesDeck Lift Lever Cup Holder if equippedStopping the Engine Starting the EngineDriving The Tractor MowingMulching Seat Making AdjustmentsSteering Leveling the DeckSide to Side Parking Brake AdjustmentMaintaining Your Lawn Tractor Cleaning The Engine & DeckEngine LubricationTire Pressure BatteryCharging Jump-StartingCutting Deck Removal FuseCutting Blades Nimu Changing Transmission Drive BeltLower Drive Belt Upper Drive BeltChanging the Deck Belts Model 604GModel 604H OFF-SEASON Storage Attachments & AccessoriesTrouble Possible Causes Corrective Action TroubleshootingParts List for Models 604G & 604H Models 604G & 604H Models 604G & 604H Part Description Models 604G & 604H Part 44 61 Part Description 1211 732-0614 Ring, Wire Model 604H Model 604G 17962 Switch Plate Part Description Models 604G & 604H Model 604G 46 711-1534 Pin, 3/8-16, 3/8 x 731-2363 Model 604H Model 604H MANUFACTURER’S Limited Warranty for

604H specifications

The MTD 604H is an advanced lawn mower designed for tackling various landscaping tasks with efficiency and precision. This powerful machine stands out in the market due to its robust set of features and cutting-edge technologies that cater to both professional landscapers and homeowners.

One of the main features of the MTD 604H is its high-performance engine. The mower is equipped with a dependable gas engine that offers superior torque and power, making it suitable for mowing large areas quickly. The engine's design emphasizes fuel efficiency, which allows users to cover more ground while minimizing fuel consumption.

Another significant characteristic of the MTD 604H is its innovative cutting deck. The mower features a wide cutting deck that can range from 36 to 42 inches, allowing for a larger clipping area. This design reduces mowing time and ensures a clean, even cut regardless of the terrain. Furthermore, the cutting height can be easily adjusted, enabling users to choose the perfect length for their grass type and seasonal conditions.

The MTD 604H also incorporates several user-friendly technologies. For instance, it has a self-propelled system that makes maneuvering easier on various terrains, such as slopes and uneven surfaces. This feature significantly reduces operator fatigue, allowing users to work longer without discomfort.

Additionally, the mower has a plush, ergonomic seat designed to provide comfort during extended use. It comes with easy-to-reach control panels that allow users to operate the mower’s functions without difficulty. The inclusion of a mulch kit further enhances its versatility, allowing users to recycle grass clippings back into the lawn instead of bagging them.

Safety is a crucial aspect of the MTD 604H. The mower is equipped with automatic blade brakes that stop the blades almost instantly when the user releases the control lever. This feature significantly reduces the risk of accidents and enhances user safety while operating the machine.

In conclusion, the MTD 604H is a feature-packed lawn mower characterized by its powerful engine, wide cutting deck, user-friendly technologies, and safety features. Whether for home use or professional landscaping services, the MTD 604H emerges as a reliable, efficient, and versatile choice for maintaining a pristine lawn.
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