Bolens 111-064A - Manual (Page 11)

^ WARNING \
If any adjustments are made to the
engine while the engine is running
(e.g.
carburetor), disengage all
clutches and blades. Keep clear of
all moving parts and be careful of
heated surfaces and muffler.
CARBURETOR ADJUSTMENTS (See figure 15)
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 cieaner on engine. Air cleaner mounting
screw must be in carburetor when engine is run.
Best adjustment is made with a fuei tank haif full
of gasoline.
FIGURE 15.
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 V 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
should accelerate smoothly. If engine tends
to stall or die out, increase idle speed or re­
adjust carburetor, 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.
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 (SAE No. 10 or 20) for ease of operation.
MAINTENANCE
CUTTING BLADE
A. Removal for Sharpening or Replacement
^ WARNING \
Be sure to disconnect and ground
the spark plug wire before working
on
the cutting blade to prevent
accidental engine starting.
11