MTD 110-328A - Manual (Page 11)

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
needle valve by turning it clockwise. Then
open
needle valve IV
2
turns counter­
clockwise.
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
adjusting 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.
FIGURE 16.
LUBRICATION
IMPORTANT
Always stop engine and disconnect
spark plug wire before cleaning,
lubricating or doing any kind of work
on lawn mower.
Discharge Chute Door Mechanism—The torsion
spring and pivot point should be lubricated
periodically with light oil to prevent any rust or
binding. Doors must work freely.
Wheels—The wheels require no lubrication.
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 (SAE No. 10 or 20) for ease of operation.
MAINTENANCE
CUTTING BLADE
The blade may easily be removed for grinding or
replacement as follows:
1. Remove bolt and lock washer holding blade
and blade adapter to engine crankshaft.
2. Remove blade and blade adapter from engine
crankshaft.
3. Remove two bolts, lock washers and nuts
holding blade to blade adapter (if necessary).
When sharpening blade, follow the original angle
of grind as a guide. It is extremely important that
each cutting edge receives an equal amount of
grinding to prevent an unbalanced blade. An un­
balanced blade will cause excessive vibration
when rotating at high speeds and may cause
damage to the mower.
To insure safe operation of your unit, ALL nuts
and bolts must be checked periodically for correct
tightness.
DECK
The underside of mower deck should be cleaned
after each period of use as grass clippings, leaves,
dirt and other matter will accumulate. This ac­
cumulation of grass clippings, etc., is undesirable
as it will invite rust and corrosion and may cause
an uneven discharge of grass clippings at the next
cutting.
The deck may be cleaned by tilting the mower for­
ward or on its side and scraping clean with a
suitable tool or by washing with a stream of water
from a garden hose.
A
CAUTION
Do not direct the stream of water at
a hot engine as damage to the
engine may result.
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