Sears 244.2117 User manual

MODEL NO.
244.2117
INTRODUCTION
OPERATION
REPAIR PARTS
owner's manual
SEARS,ROEBUCK ANDCO. U.S.A.
3-0323-6
PRINTED IN U. S. A.

INTRODUCTION
RULES FOR SAFE OPERATION
1. Alwaysoperate vehicle ina well-ven- 5
tilated area to avoid carbonmonoxide
poisoning,
2. Set parkingbrake and placegear shift
lever inthe neutral or park position.
3. Avoid contact of hands or testleads
with fan blade, fan belt, power steer- -,
ing belt andair conditioner belt.
4. Do riot touch hot exhaust manifold,
radiator,high-voltagespark plugs or8,
coilterminals.Whilesparkvoltages
arenot normally lethal, an involun-
taryjerk ofthe hands may cause you
injury.
Avoid high enginespeeds in neutral
gear, as this may damage the engine.
The gas formedabove the electrolyte
while a battery is beingcharged isex-
plosive. Donot smoke or permit
flame or spark to occur near a bat-
tery on charge.
Neverpuncture the spark plug cables
to hook upa timing light or othertest
equipment. Usethe properadapter.
A battery is capable of providingvery
high currents. Therefore, reason-
able caremust be exercised when,
working near the battery to prevent
shorting it out.
GENERAL INFORMATION
• Prope,r ignition timing isoneofthe mo,.sfc.im-p.o_r^:ntrf a^or^^
ficient and economicaloperation of an automobileengine.Improperignition
timing may cause overheating, loss of power, poor acceleration and perform-
ance, andmay evenshorten the service life ofthe engine.
Although the Model 244. 2117 timinglight is used for timing the engine to man-
ufacturer's specifications, it should be remembered that timing is also affected
by the dwell, or period of time that the distributor points are closed. There-
fore, a dwellmetermust be used tosetthe dwell to manufacturer's specifi-
cations before the actualtiming ofthe engine canbe performed.
Trie following instructions are intended asa generalguide to properignition
timing. For more specific information, the operator should always refer to
the manufacturer's specifications and test procedures.
NOTE: The Model 244.211? timinglight canbe used on magnetosystems
by connecting the leads as follows:
1. Connect redand blackleads toan external 6 or12 volt battery,
observing proper polarity(redclip to positive terminal, black
clip to negativeterminal).
2. Connect a jumperwire between the negative post ofthe battery
and the magnetosystem ground.
3. Connect the timinglighthigh-tensionlead totheNo,1 spark
plug.

OPERATION
ENGINE TIMING CHECK
With engine stopped, connect the tim-
ing light as shown.
NOTE: Ifthe engine is running, al-
ways make connection first
to the battery and then tothe
spark plug. When discon-
necting, alwaysremove the
spark plug lead first.
Allow engine to warm up.
Timing must be done at engine speed
specified by manufacturer. If neces-
sary, use a tachometer toset idle
RPM.
BLACK
4. Disconnect and plugvacuum advance
line.
5. Press switch on timinglight andob-
servetiming mark. Position of mark
in relation to timingindicatormust
agree with
tions,
manufacturer's specifica
timing
mark"

TIMING ADJUSTMENT
1. Loosen distributor hold-downbolt.
Rotate the distributor body inthe di-
rectionrequired to align timing mark.
Tighten distributor hold-down bolt and
recheck timing.
Rotor
Rotation
Hold-down
bolt
RETARD
ADVANCE . ADVANCE
Rotor
Rotation
RETARD
CENTRIFUGALADVANCE CHECK
1. Withvacuumadvance line disconnected
and engine at idle KPM, noteposition
of timing mark.
2. Gradually increase engine speed.
3. The timing mark shouldmoveopposite
to the direction of enginerotation to
advance spark.

VACUUMADVANCE CHECK
1. Operate engine at approximately1500
RPM.
2. Reconnect vacuum advance line tothe
distributor and observemovement of
timing mark.
3. The timing mark shouldmoveopposite
tothe direction o£ enginerotation to
advance the spark, and will appear be-
yond the range of the indicator.
IGNITION SYSTEM FAULTS
If the spark plug to which the timinglight
is connected isnot firing forany reason,
the timing light will not flash. Ifthe spark
plug gapissettoo wide, the light will op-
erate, but arcing ofthe safety gap within
the timing lightmay be heard andthe spark
plugmaymisfire. This is normal and does
no harm. Ifthe gaps ofthe other spark
plugs inthe engine areset extremely wide
orifthe insulation onthe otherspark plug
cables is leaky, the timinglight may double
flash or miss. Multipleflashing can also
be caused bythe timinglighthigh-tension
lead lying on, or-close to,the otherspark
plug wires.
•*:=
M
R
Typical Timing Marks