Poulan 425 - Manual (Page 15)

GENERAL MAINTENANCE
A good maintenance program of regular inspection
and care will increase the service hfe and help to
maintain the safety eind performance of your saw.
• Make all ac(justments or repairs (except car­
buretor acljustments) with;
— spark plug wire disconnected,
— engine cool as opposed to a saw that has just
been run.
Check the saw for loose bolts, screws, nuts,
and fittings regularly. Loose fasteners can
cause an unsafe condition as well as damage to
your saw.
A WARNING
Have all chain saw service performed by a quail-
fled service dealer other than the items listed in
the maintenance section of this manual.
A. CHAIN REPLACEMENT
• Use only the replacement chain specified
for your saw (see “NOTE” in the Accesso­
ry section).
• Replace the chain when cutters or links
break.
See a qualified service dealer to replace
and
sharpen individual cutters for
matching your chain.
Always have a worn sprocket replaced by
a qualified service dealer when install­
ing a new chain to avoid excessive wear
to the chain.
B. GUIDE BAR MAINTENANCE
• Conditions which can require guide bar
maintenance:
- saw cuts to one side.
- saw has to be forced through a cut.
- inadequate supply of oil to bar and
chain.
• Check the condition of the guide bar
each time the chain is sha^ened. A worn
guide bar will damage the chain and make cut­
ting more difficult.
• Replace the guide bar when:
- the groove in the guide bar is worn,
- the guide bar is bent or cracked,
• Use only the replacement guide bars spe­
cified for your saw. Reduced Kickback
guide bars are available (see “NOTE” in
the Accessory section).
• Remove the guide bar to service.
• Clean the oil holes at least once after every
five hours of operation.
• Remove sawdust from the ^de bar groove
periodically with a putty knife or a wire.
Figure
29.
Remove burrs by filing the side edges of the
guide bar grooves square with a flat file.
Figure 30,
Squeire the edges of an uneven r 2 ul top by
filing with a flat file. Figure 30 .
Remove Sawdust
From Guide Bar
Groove
Figure 29
ИЛ у ПЛ
Correct
Guide Bar
Groove
Worn Grooves File Edges
Square
Figure 30
G. SPARK ARRESTOR
- • Carbon* deposits build up oh the spark ar­
restor as the saw is used and must be removed to
avoid creating a fire hazard or causing engine
damage.
• Replace the spark arrestor if breaks occur.
• Keep the spark arrestor clean at all times.
Clean: - as required.
-'at leairt once for each 25—30
hours of operation.
Items required; wire brush, 3/8” wrench
1. Disconnect the spark plug wire.
2. Remove the muffler cover. Figure 31.
3. Remove the screen from the muffler,
4. Clean the screen with a wire brush or replace if
breaks are found,
5. Reassemble parts.
NOTE: Too much oil in the fuel mixture can
cause excessive carbon b\iild-up in the spark ar­
restor screen. Use only the correct fuei/oLi ratio as
instructed in the Engine Information section.
Figure 31
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