Craftsman 247.298770 Owner's Manual page 17

C. Take air cleaner apart
D, Wash element in detergent and solution by
squeezing similar to a sponge
FIGURE 44.
E Wrap foam in cloth and squeeze dry.
F. Coat element with two tablespoons of engine
oil, squeeze to distribute and remove excess
oil. See figure 45.
G. Wipe air cleaner body with same solution to
remove excess oil.
H,, Reassemble (See figure 44,) by inserting
element into body and snapping cover into
place, fasten to carburetor with screw.
FIGURE 45.
NEVER RUN YOUR ENGINE WITHOUT
CLEANER COMPLETELY ASSEMBLED°
AIR
Carburetor Adjustment:
1. Never make unnecessary adjustments. The
factory settings are correct for most applica-
tions.
2. If adjustments are needed, proceed as
follows:
A.
B.,
Idle Adjusting
INITIAL ADJUSTMENT. See figure 46
Close needle valve (turn clockwise) then
open 1_,_ turns (lurn counterclockwise)
This initial adjustment will permit the
engine to be started and warmed up before
makine final adjustment
FINAL, ADJUSTMENT.. See _igure 46.. With
engine running at fast operating speed
(approximately 3,000 RPM without load)
close the needle valve (turn clockwise)
until engine starts to lose speed (lean
mixture), Then slowly open needle valve
(turn counterclockwise) pasl the point of
smoothest operation until engine just
begins to run unevenly This mixture
should be rich enough for best perform-
ance under load. Hold throttle in idling
position Turn idle speed adjusting screw
until fast idle is obtained (1.750 RPM),,
Test the engine and if it tends to stall or
die out, it usually indicates that the
mixture is slightly lean and it may be
necessary to open the needle valve slightly
to provide a richer mixture This richer
mixture may cause a slight unevenness in
idling
Screw ._. !._'P_--;_. ..._,
_"_-_ ":-2:'-,_ i;,..e
,_:.o,o::.::_:.,c':.' Needle Valve .:
FIGURE 46.
W NOTE
ALWAYS ALLOW SEVERAL SEC-
ONDS BETWEEN EACH ADJUST-
MENT FOR THE ENGINE CARBU-
RETOR TO REACT TO THE NEW
SETTING
3. Never attempt to change maximum engine
speed as THIS IS PRESET AT THE FACTORY.
Excessive speed, caused by by-passing the
governor, can cause extensive damage to your
engine.
SPARK PLUG:
1• Remove the spark plug each time you change
the oil and inspect it. See figure 47,
17