Mtd 111-020-300 User Manual download pdf (Page 8)

CARBURETOR ADJUSTMENTS (See Figure 11)

Minor carburetor adjustment may be required to

compensate for differences in fuel, temperature,

altitude and load.

All carburetor adjustments should be made with

the air cleaner on engine. Air cleaner mounting

screw must be in carburetor when engine is run.

Best adjustment is made with a fuel tank half full

of gasoline.

To Adjust Carburetor:

1. Start engine and run long enough to warm it to

operating temperature. If engine is out of ad

justment so that it will not start, close the nee

dle valve by turning it clockwise. Then open

needle valve 1-1/2 turns counterclockwise.

2. Move engine control to run engine at normal

operating speed.

a. Turn needle valve in clockwise until engine

starts to lose speed (lean mixture).

b. Then slowly turn needle valve out

counterclockwise past the point of

smoothest operation until engine just

begins to run unevenly (rich mixture).

c. Turn needle valve back in clockwise very

slowly till engine runs evenly.

d. Final adjustment of the needle valve

should be slightly to the rich side (turn

counterclockwise) of the mid-point.

3. Move engine control to SLOW. Turn idle ad

justing screw until a fast idle is ob

tained—(1750 R.P.M.).

4. To check adjustment, move engine control

from SLOW to FAST speed. Engine shouid ac

celerate smoothly. If engine tends to stall or

die out, increase idle speed or readjust car

buretor, usually to a slightly richer mixture.

LUBRICATION

IMPORTANT

Always stop engine and disconnect

spark plug wire before cleaning,

lubricating or doing any kind of

work on lawn mower.

Wheels—The wheels require no lubrication.

However, if the wheels are removed for any

reason, lubricate the surface of the axle bolt and

the inner surface of the wheel with light oil. A 4 oz.

plastic bottle of light oil lubricant is available.

Order part number 737-0170. Engine oil may also

be used.

Protective Shield—The pivot points on the protec

tive shield should be lubricated periodically with

light oil to prevent any rust or binding.

Chute Deflector—The torsion spring and pivot

point should be lubricated periodically with light

oil to prevent any rust or binding. Deflector must

work freely.

Engine—Follow engine manual for lubrication in

structions.

Throttle—Periodically lubricate throttle control

lever and throttle wire assembly with a few drops

of light oil for ease of operation.

MAINTENANCE

WARNING i

Disconnect spark plug wire

and ground it against the engine

before performing any repairs

or maintenance.

CUTTING BLADE

A. Removal for Sharpening or Replacement

^ WARNING {

FIGURE 11.

Be sure to disconnect and ground

the spark plug wire before working

on the cutting blade to prevent

accidental engine starting.

1. Remove the large bolt and lock washer which

holds the blade and adapter to the engine

crankshaft.

2. Remove the blade and adapter from the

crankshaft. Be careful not to lose the key on

the crankshaft.

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Mtd 111-020-300 User Manual Page 8

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