Craftsman 316.350850 - Manual (Page 20)

MAINTENANCE AND REPAIR INSTRUCTIONS
STORING A CHAIN SAW
Storing a chain saw for longer than 30 days requires stor-
age maintenance. Unless the storage instructions are fol-
lowed, fuel remaining in the carburetor will evaporate,
leaving gum-like deposits. This could lead to difficult start-
ing and result in costly repairs.
1. Remove the fuel tank cap slowly to release any pres-
sure in tank. Carefully drain the fuel tank by running
the unit dry or by tipping the motor housing/fuel tank
over and draining oil/fuel mixture into a container with
the same 2-cycle fuel mixture.
2. Start the engine and let it run until the unit stops to
remove fuel from carburetor.
3. Allow the engine to cool (approx. 5 minutes).
4. Using a spark plug wrench, remove the spark plug.
5. Pour 1 teaspoon of clean 2-cycle oil into the combus-
tion chamber. Pull starter rope slowly several times to
coat internal components. Replace spark plug (Fig.
36).
NOTE: Store the unit in a dry place and away from possi-
ble sources of ignition such as a furnace, gas hot
water heater, gas dryer, etc.
Fig. 36
REMOVING A UNIT FROM STORAGE
1. Remove spark plug.
2. Pull starter rope briskly to clear excess oil from com-
bustion chamber.
3. Clean and gap spark plug or install a new spark plug
with proper gap.
4. Prepare unit for operation.
5. Fill fuel tank with proper fuel / oil mixture. See Oil and
Fuel Information.
Never store a chain
saw for longer than 30
days without performing the following proce-
dures.
CAUTION:
Sprocket Tip Lubrication
The Lube Gun (not included) is recommended for applying
grease to the guide bar sprocket tip. The Lube Gun is
equipped with a needle nose tip which is necessary for
the efficient application of grease to the sprocket tip.
The sprocket tip on
your new saw has
been pre-lubricated at the factory. Failure to
lubricate the guide bar sprocket tip as
explained below will result in poor perform-
ance and seizure, voiding the manufacturer’s
warranty.
Lubrication of the sprocket tip is recom-
mended after 10 hours of use or once a
week, which ever occurs first. Always thor-
oughly clean guide bar sprocket tip before
lubrication.
CAUTION:
Fig. 37
To lubricate the sprocket tip:
1. Move the STOP switch up.
NOTE: It is not necessary to remove the saw chain to
lubricate the guide bar sprocket tip. Lubrication
can be done on the job.
2. Clean the guide bar sprocket tip.
3. Using the Lube Gun (not included), insert tip of lube
gun into the lubrication hole and inject grease until it
appears at outside edge of sprocket tip (Fig. 37).
4. Rotate saw chain by hand. Repeat lubrication procedure
until the entire sprocket tip has been greased.
SAW CHAIN / BAR LUBRICATION
Adequate lubrication of the saw chain is essential at all
times to minimize friction with the guide bar.
Never starve the bar and chain of oil. Running the saw
with too little oil will decrease cutting efficiency, shorten
saw chain life, cause rapid dulling of chain, and cause
excessive wear of bar from overheating. Too little oil is evi-
denced by smoke, bar discoloration or pitch build-up.
NOTE: Saw chain stretches during use, particularly when
it is new, and it will occasionally be necessary to
adjust and tighten it. New chain will require adjust-
ment after about 5 minutes of operation.
AUTOMATIC OILER
Refer to Section Other Instructions: Automatic Oiler for
information on the automatic oiler.
GUIDE BAR MAINTENANCE
Frequent lubrication of the guide bar (railed bar which
supports and carries the saw chain) sprocket tip is
required. Proper maintenance of the guide bar, as
explained in this section, is essential to keep your saw in
good working condition.
20
MAINTENANCE AND REPAIR INSTRUCTIONS
OIL FILTER
NOTE: Drain oil reservoir before changing filter
1. Take the bottom plate off then use a wire with a hook
(A) and pull oil filter (B) from reservoir. Remove old filter
and replace.
2. Put filter and oil line back into oil reservoir so filter is at
bottom of reservoir.
SPARK PLUG
NOTE: For efficient operation of saw engine, spark plug
must be kept clean and properly gapped.
1. Push STOP switch up.
2. Remove top Cover. Disconnect the wire connector
from the spark plug by pulling and twisting at the
same time (Fig. 35).
3. Remove spark plug with spark plug socket wrench.
DO NOT USE ANY OTHER TOOL.
4. Check electrode gaps with wire feeler gauge and set
gaps to .025” (.635mm) if necessary.
5. Reinstall a new spark plug (champion RDJ8J or equiv-
alent).
NOTE: A resistor spark plug must be used for replace-
ment (part no. 9295-320001).
NOTE: This spark ignition system meets all requirements
of the Canadian Interferen-Causing Equipment
Regulations.
Do not sand blast,
scrape or clean
electrodes. Grit in the engine could damage
the cylinder.
WARNING:
Fig. 35
CARBURETOR ADJUSTMENT
The carburetor was pre-set at the factory for optimum per-
formance. If further adjustments are necessary, please
take your unit to a Sears or other qualified service dealer.
B
H
G
F
E
A
J
Fig. 34
SPARK ARRESTER SCREEN
NOTE: A clogged spark arrester screen will dramatically
reduce engine performance.
1. To flatten the corners of the lock plate to be able to
access the retaining nuts. Remove 2 muffler retaining
nuts (E), Lock plate (F) and muffler cover(G) (Fig. 34).
2. Remove spark arrester screen (H) from the metal baffle
(J). Replace screen with new one.
3. Reassemble the muffler components and tighten nuts
securely.
Fig. 33
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