Mtd 110-112A User Manual download pdf (Page 7)

Low Position

High Position

FIGURE/.

THROTTLE

If adjustment becomes necessary, the throttle

control wire assembly can be reset as follows:

1. Loosen, but do not remove, screw securing

throttle control wire assembly at engine. See

figure 8.

2. Move throttle control lever on handle to

“FAST” position.

3. Move lever, to which control wire is fastened

at engine, to full open position and retighten

screw to secure throttle control wire

assembly.

Throttle

Control Wire

Screw On

Engine

\ WARNING j

FIGURES.

If any adjustments are made to the

engine while the engine is running

(e.g. carburetor), disengage all clut

ches and blades. Keep clear of all

moving parts and be careful of

heated surfaces and muffler.

CARBURETOR ADJUSTMENTS (See figure 9.)

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 1V2 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

obtained—(1750 R.P.M.).

4. To check adjustment move engine control

from “SLOW” to “FAST” speed. Engine

should accelerate smoothly. If engine tends

to stall or die out, increase idle speed or re

adjust carburetor, usually to a slightly richer

mixture.

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