Troubleshooting - Troy-Bilt TB490BC Operator's Manual

CAUSE
Ignition switchis
OFF
Empty fuel tank
Primer bulb wasn't pressed enough
Engine flooded
Old Gasoline
Fouled spark plug
CAUSE
Air Filter is Plugged
Old Gasoline
improper carburetor adjustment
CAUSE
Old Gasoline
improper carburetor adjustment
Cutting head bound with grass
Dirty air filter
Clogged Spark Arrestor Screen
ACTION
Turn switch to ON
Fill fueI tank
Press primer bulb fully and slowly 5-7 times
Use starting procedure with choke lever in the
RUN position, Pg+ 13
Drain fuel tank/Add fresh Gasoline
Replace or clean the spark plug
ACTION
Replace or clean the air filter
Drain fuel tank / Add fresh Gasoline
Adjust per instruction Pg. 22
ACTION
Drain gas tank / Add fresh Gasoline
Take to an authorized service dealer for
carburetor adjustment
Stop the engine and clean the cutting attachment
Clean or replace the air filter
Clean or Replace. See Pg. 24
CAUSE
Old Gasoline
improper carburetor adjustment
Clogged Spark Arrestor Screen
CAUSE
Cutting head bound with grass
Cutting head out of line
Inner reel bound up
Cutting head dirty
Line welded
Line twisted when refilled
Not enough line is exposed
ACTION
Drain fuel tank / Add fresh Gasoline
Take to an authorized service dealer for
carburetor adjustment
Clean or Replace. See Pg. 24
ACTION
Stop the engine and clean cutting attachment
Refill with new line
Replace the inner reel
Clean inner reel and outer spool
Disassemble, remove the welded section
and rewind the line
Disassemble and rewind the line
Push the Bump Knob and pull out line until
4 inches (102 mm) of line is outside of the
cutting attachment
if further assistance is required, contact your authorized service dealer.
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