MTD 110-530A - Manual (Page 7)

Throttle
Control Wire
Screw On ^
Engine
FIGURE 3.
I 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 4.)
Minor carburetor adjustment may be required to
compensate for differences in fuel, temperature,
altitude and load.
Initiai Adjustment:
Turn needle valve clockwise to close it. Then open
2 turns. This initial adjustment will permit the
engine to be started and warmed up before mak­
ing final adjustment.
Final Adjustment:
With engine running at normal operating speed
(approximately 3000 RPM without load), turn nee­
dle valve clockwise until engine starts to lose
speed (lean mixture). Then slowly turn needle
valve counterclockwise past the point of
smoothest operation, until engine just begins to
run unevenly. This mixture will give best perfor­
mance under load.
To check adjustment, move engine control from
SLOW to FAST speed. If engine tends to stall or
die out, it usually indicates that the mixture is
slightly lean. It may be necessary to open the nee­
dle valve slightly to provide a richer mixture. This
richer mixture may cause a slight unevenness in
idling.
LUBRICATION
IMPORTANT
Always stop engine and disconnect
spark plug wire before cleaning,
lubricating or doing any kind of work
on lawn mower.
Wheels— Unit is provided with ball bearing
wheels. Lubricate at least once a season with light
oil.
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 manaul for lubrication in­
structions. Check oil level before each use.
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.
Friction point between idler bracket assembly
(Ref. No. 18 on page 16) and deck should be greas­
ed once each season with a multi-purpose grease.
Blade Spindle Assembly— The blade spindle
assembly is equipped with a grease fitting. Use
grass discharge chute for access to the fitting
located under the deck. Use multi-purpose grease.
Lubricate PRIOR to initial use and every 25 hours
thereafter.