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G2500 / G2500 OPS
GB-17
G
B
side of a cutter. If a gap is observed between them,
the rail is normal. Otherwise, the bar rail is worn.
Such a bar needs to be corrected or replaced.
WARNING:
This saw is equipped with one of the following low
kickback bar/chain combinations:
Komatsu Zenoah Part Number
Bar Size Guide Bar Saw Chain Drum
10 2475-52110 2475-52210 2475-51110
10 2475-52120 3622-52210 2841-51110
WARNING
Be sure to round off the front edge to reduce the
chance of kickback or tie-strap breakage.
Make sure every cutter has the same length and edge
angles as illustrated.
■ Guide Bar
• Reverse the bar occasionally to prevent partial wear.
• The bar rail should always be square. Check for wear
of the bar rail. Apply a ruler to the bar and the out
Ruler
Gap
No gap
Chain tilts
9. Troubleshooting Guide
Case 1. Starting failure
WARNING
Make sure the icing prevention system is not work-
ing.
Check fuel for water
or substandard mix-
ture.
Replace with proper
fuel.
Check for engine
flooding.
Check spark ignition.
Remove and dry the
spark plug.
Then pull the starter
again with no choke.
Replace with a new
plug.
Case 2. Lack of power/Poor acceleration/
Rough idling
Case 3. Oil does not come out
Check fuel for water
or substandard mix-
ture.
Check air filter and
fuel filter for clog-
ging.
Check carburetor
for inadequate ad-
justment.
If the unit seems to need further service, please consult
with an authorized service shop in your area.
Replace with proper
fuel.
Clean.
Readjust speed
needles.
Check oil for sub-
standard quality.
Check oil passage
and ports for clog-
ging.
Replace.
Clean.
a
d
d
a
a
d
d
a
a
a
d
a
a
Cutter length
Filing angle
Side plate angle
Top plate cutting angle