Troy-Bilt 549 사용자 설명서

13

•

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.

•

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. 

•

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.

•

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.

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.

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.

Engine fails to start

1.

Blade control handle disengaged.

2.

Spark plug wire disconnected.

3.

Fuel tank empty or stale fuel.

4.

Blocked fuel line.

5.

Faulty spark plug.

6.

Engine flooded

1.

Engage blade control handle.

2.

Connect wire to spark plug.

3.

Fill tank with clean, fresh gasoline.

4.

Clean fuel line.

5.

Clean, adjust gap, or replace.

6.

Wait a few minutes to restart. (do not prime 
model 549).

Engine runs erratic

1.

Spark plug wire loose.

2.

Blocked fuel line or stale fuel.

3.

Vent in gas plugged.

4.

Water or dirt in fuel system.

5.

Dirty air cleaner.

6.

Carburetor out of adjustment.

1.

Connect and tighten spark plug wire.

2.

Clean fuel line; fill tank with fresh gasoline

3.

Clear vent.

4.

Drain fuel tank. Refill with fresh fuel.

5.

Clean air cleaner.

6.

Adjust carburetor.

Engine overheats

1.

Engine oil level low.

2.

Air flow restricted.

3.

Carburetor not adjusted properly.

1.

Fill crankcase with proper oil.

2.

Remove blower housing and clean.

3.

Adjust carburetor.

Excessive vibration

1.

Cutting blade loose or unbalanced.

2.

Bent cutting blade.

1.

Tighten blade and adapter. Balance blade.

2.

Replace blade.

Mower will not mulch grass

1.

Wet grass.

2.

Excessively high grass.

3.

Dull blade.

1.

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

2.

Mow once at a high cutting height, then mow 
again at desired height.

3.

Sharpen or replace blade. 

Uneven cut

1.

Wheels not positioned correctly.

2.

Dull blade.

1.

Place all four wheels in same position.

2.

Sharpen or replace blade.

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