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MTD 549 Manual Del Operador página 13

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Sharpening the Blade
The blade can be sharpened with a file or on a
grinding wheel. Do not attempt to sharpen the
blade while it is still on the mower.
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.
_
ARNING"
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.
Balancingthe 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. Ibs. min., 600 in. Ibs. max.
NOTE:
To ensure
safe operation
of your
mower,
periodically check the blade bolt for correct torque,
Replacing R earFlap
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 YourLawn 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
Engine fails to start
Engine runs erratic
Engine overheats
Excessive vibration
Mower will not mulch grass
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.
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.
Engine oil level low.
2.
Air flow restricted.
3.
Carburetor not adjusted properly.
1.
Cutting blade loose or unbalanced.
2.
Bent cutting blade.
1.
Wet grass.
2.
Excessively high grass.
3.
Dull blade.
1.
2.
3.
Uneven cut
Wheels not positioned correctly.
1.
Dull blade.
2.
Remedy
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.
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.
1.
Fill crankcase with proper oil.
2.
Remove blower housing and clean.
3.
Adjust carburetor.
1.
Tighten blade and adapter. Balance blade.
2.
Replace 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.
Sharpen or replace blade.
Place all four wheels in same position.
Sharpen or replace blade.
13

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