Troubleshooting Chart - MTD Yard Machines Y780 Manual Del Operador

ENGINE WILL NOT START
C A U S E
Empty fuel tank
Primer bulb wasn't pressed enough
Engine is flooded
Old or improperly mixed fuel
Fouled spark plug
Plugged spark arrestor
ENGINE WILL NOT IDLE
C A U S E
Air filter is plugged
Old or improperly mixed fuel
Improper carburetor adjustment
ENGINE WILL NOT ACCELERATE
C A U S E
Old or improperly mixed fuel
Improper carburetor adjustment
Cutting attachment bound with grass
Dirty air filter
Plugged spark arrestor
ENGINE LACKS POWER OR STALLS WHEN CUTTING
C A U S E
Old or improperly mixed fuel
Improper carburetor adjustment
Fouled spark plug
Plugged spark arrestor
CUTTING ATTACHMENT WILL NOT ADVANCE LINE
C A U S E
Cutting attachment bound with grass
Cutting attachment out of line
Inner reel bound up
Cutting head dirty
Line welded
Line twisted when refilled
Not enough line is exposed
CUTTING LINE ADVANCES UNCONTROLLABLY
C A U SE
Oil, cleaner or lubricant in cutting head
If further assistance is required, contact your authorized service dealer.
TROUBLESHOOTING
Fill fuel tank with new fuel
Press primer bulb fully and slowly 10 times
Use starting procedure with choke lever in position 3
Drain fuel tank and add fresh fuel
Replace or clean the spark plug
Clean or replace spark arrestor
Replace or clean the air filter
Drain fuel tank and add fresh fuel
Adjust carburetor
Drain fuel tank and add fresh fuel
Take to an authorized service dealer for adjustment
Stop the engine and clean the cutting attachment
Clean or replace the air filter
Clean or replace spark arrestor
Drain fuel tank and add fresh fuel
Take to an authorized service dealer for adjustment
Replace or clean the spark plug
Clean or replace spark arrestor
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
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
Clean and thoroughly dry the cutting head
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