Troy-Bilt 549 Troubleshooting, Replacing Rear Flap, Storing Your Lawn Mower, Balancing the Blade

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•Follow the original angle of grind as a guide. Make sure that each cutting edge receives an equal amount of grinding to prevent an unbalanced blade.

WARNING: An unbalanced blade will cause excessive vibration when rotating at high speeds. It may cause damage to the mower, and could break causing personal injury.

Balancing the Blade

•The blade can be tested by balancing it on a round shaft screwdriver. Remove metal from the heavy side until it balances evenly. It is recommended that the blade always be removed from the adapter when testing for balance.

Installing the Blade

•Before reinstalling the blade and the blade adapter to the unit, lubricate the engine crankshaft and the inner surface of the blade adapter with light oil.

•Be sure to install the blade with the side of the blade marked “Bottom” (or with part number) facing the ground when the mower is in the operating position.

•Slide the blade adapter onto the engine crankshaft.

•Place the blade on the adapter. Be certain the blade is aligned and seated on the blade adapter flanges.

•Place blade bell support on blade. Make sure the notches on the blade bell support are aligned with small holes in the blade.

•Replace hex bolt and tighten hex bolt to torque: 450 in. lbs. min., 600 in. lbs. max.

NOTE: To ensure safe operation of your mower, periodically check the blade bolt for correct torque.

Replacing Rear Flap

•To remove rear flap, cut off the flat end of the wire rod which secures it to the deck.

•Attach the new flap and new rod to deck, bending the ends of the new rod over to secure to deck.

Storing Your Lawn Mower

The following steps should be taken to prepare your lawn mower for storage.

•Clean and lubricate mower thoroughly as described in the lubrication instructions.

•Refer to engine manual for correct engine storage instructions.

•Coat mower’s cutting blade with chassis grease to prevent rusting.

•Store mower in a dry, clean area. Do not store next to corrosive materials, such as fertilizer.

SECTION 9: TROUBLESHOOTING

Problem

 

Cause

 

Remedy

 

 

 

 

 

Engine fails to start

1.

Blade control handle disengaged.

1.

Engage blade control handle.

 

2.

Spark plug wire disconnected.

2.

Connect wire to spark plug.

 

3.

Fuel tank empty or stale fuel.

3.

Fill tank with clean, fresh gasoline.

 

4.

Blocked fuel line.

4.

Clean fuel line.

 

5.

Faulty spark plug.

5.

Clean, adjust gap, or replace.

 

6.

Engine flooded

6.

Wait a few minutes to restart. (do not prime

 

 

 

 

model 549).

 

 

 

 

 

Engine runs erratic

1.

Spark plug wire loose.

1.

Connect and tighten spark plug wire.

 

2.

Blocked fuel line or stale fuel.

2.

Clean fuel line; fill tank with fresh gasoline

 

3.

Vent in gas plugged.

3.

Clear vent.

 

4.

Water or dirt in fuel system.

4.

Drain fuel tank. Refill with fresh fuel.

 

5.

Dirty air cleaner.

5.

Clean air cleaner.

 

6.

Carburetor out of adjustment.

6.

Adjust carburetor.

 

 

 

 

 

Engine overheats

1.

Engine oil level low.

1.

Fill crankcase with proper oil.

 

2.

Air flow restricted.

2.

Remove blower housing and clean.

 

3.

Carburetor not adjusted properly.

3.

Adjust carburetor.

 

 

 

 

 

Excessive vibration

1.

Cutting blade loose or unbalanced.

1.

Tighten blade and adapter. Balance blade.

 

2.

Bent cutting blade.

2.

Replace blade.

 

 

 

 

 

Mower will not mulch grass

1.

Wet grass.

1.

Do not mow when grass is wet; wait until

 

 

 

 

later to cut.

 

2.

Excessively high grass.

2.

Mow once at a high cutting height, then mow

 

 

 

 

again at desired height.

 

3.

Dull blade.

3.

Sharpen or replace blade.

 

 

 

 

 

Uneven cut

1.

Wheels not positioned correctly.

1.

Place all four wheels in same position.

 

2.

Dull blade.

2.

Sharpen or replace blade.

 

 

 

 

 

NOTE: For repairs beyond the minor adjustments listed above, contact your local authorized service dealer.

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Contents MTD LLC, P.O. BOX 361131 CLEVELAND, Ohio Operator’s ManualTable of Contents General Operation Important Safe Operation PracticesSlope Operation ServiceChildren Do NotYour Responsibility General ServiceSlope Gauge Setting Up Your Lawn Mower Before AssemblyAssembling Your Lawn Mower Removing Unit From CartonAssembling Grass Catcher Attaching Starter RopeAttaching Grass Catcher & Chute Know Your Lawn Mower Operating Your Lawn Mower Cutting Height Adjustment Handle Height AdjustmentMulching Bagging Grass ClippingsServicing Your Lawn Mower Maintaining Your Lawn MowerInstalling the Blade TroubleshootingReplacing Rear Flap Storing Your Lawn MowerParts List for Models 546 Parts List for Models 546 MANUFACTURER’S Limited Warranty for

549, 546 specifications

The Troy-Bilt 546 and 549 are considered some of the most reliable and efficient garden tractors available in the market. Designed for heavy-duty tasks, these models cater to homeowners with expansive lawns and landscapes that require a robust machine for maintenance.

One of the main features of the Troy-Bilt 546 and 549 is the powerful engine. Both models come equipped with a reliable 24-horsepower engine that provides ample power for various mowing and towing tasks. This strength allows users to tackle even the toughest grass, making lawn care more efficient. The automatic transmission enhances the riding experience by providing smooth acceleration and seamless shifting without manual intervention.

The cutting decks of the 546 and 549 models are engineered for optimal performance. With a wide mowing deck ranging from 42 inches to 54 inches, these tractors can cover large areas in a single pass. The adjustable cutting height feature allows users to select from multiple settings, ensuring they achieve the perfect lawn finish, whether it be a close cut or a more relaxed height.

The technologies incorporated into these models also elevate their functionality. The Troy-Bilt 546 and 549 are equipped with the innovative Twin Blade System that ensures a clean and even cut every time. This system also improves bagging capabilities, making it easier to maintain a tidy yard. Additionally, the mulching option allows for nutrient recycling back into the soil, promoting healthier grass growth.

Both models boast user-friendly characteristics aimed at enhancing comfort and convenience. The high-back seat provides support during extended use, while the ergonomic steering wheel and easy-to-reach controls make operating the tractor straightforward.

Moreover, safety features, such as a built-in seat switch, ensure that the engine stops if the operator leaves the seat, preventing accidents during operation.

In terms of versatility, the Troy-Bilt 546 and 549 are compatible with various attachments, such as snow blades, tillers, and mulch kits, transforming them into multi-use machines that can tackle year-round tasks, from mowing lawns in summer to clearing snow in winter.

Overall, the Troy-Bilt 546 and 549 models stand out with their combination of power, cutting technology, and user-friendly design, making them excellent choices for homeowners aiming to maintain their outdoor spaces efficiently and effectively.
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