CARBURnOR TROUBLE CHART
CHAIN
The chain
is
sharpened best by removing it from the
saw and sharpening in a filing vise designed for the
To get top efficiency from your direct drive saw the
job. Several acceptable models are on the market.
chain must
be
kept in top condition. A dull chain
produces a rough action and causes chain to bind in
File the cutting angle exactly the same on all cutting
the cut. This action loosens the teeth and rivets of
teeth,
35O, using a 7/32 inch round chain saw file.
the chain and causes excessive wear of groove in This
will
insure maintaining the correct shape of the
guide bar.
cutting teeth. Keep the file horizontal and use firm
TROUBLE
CARBURETORFLOODS
ENGINE WILL NOT ACCELERATE
main adjusting screw. Clean out
orifice by blowing through main
adjustment threaded hole
ENGINE WILL NOT IDLE
Incorrect idle adjustment Reset to best idle
Idle discharge ports or channels Blow out with clean compressed
clogged
air or
If
compressed
air
is
not
available clean and
.flush with
gasoline
Diaphragm lever set incorrectly Reset diaphragm lever so
it
is
flush with the floor of the dia-
phragm chamber
Throttle shutter cocked in the
Reset; this condition caused
in
an
throttle bore excessively fast idle
ENGINE RUNS OUT LEAN IN
Tank vent not operating correctly Clean or replace
CUT
Leak in fuel system from
tank
Tighten or replace fittings or line
to Pump
Ruptured fuel pump diaphragm Replace
Main fuel orifice plugged Clean
CARBURETOR RUNS RICH
WITH
The
1/8"
diameter nozzle
Install new plug
MAIN
ADJUSTMENT SHUT OFF
channel plug is not sealing
NOTE:
In
making carburetor adjustments
turn
adjustments carefully and gently
-
do not ram adjustments
into seats.
7
POSSIBLE
CAUSE
Dirt or foreign particles pre-
venting inlet needle from seating
Diaphragm lever spring not
seated on lever dimple
Diaphragm distorted and inter-
fering with the lever operation
Idle
adjwting screw set too lean
Incorrect setting on diaphragm
lever
Inlet needle binding
Diaphragm cover plate loose
Diaphragm gasket leaking
Main fuel orifice plugged
REMEDY
Remove, clean and replace
Remove lever and
reinstall
Replace diaphragm
Enrich idle adjustment
Reset
Remove, clean and replace
Tighten
Replace
-
Remove diaphragm cover,
diaphragm, diaphragm lever and
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