Troubleshooting – Ryobi 780r User Manual
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If further assistance is required, contact your authorized service dealer.
C A U S E
A C T I O N
Cutting attachment bound with grass
Stop the engine and clean cutting attachment
Cutting attachment out of line
Refill with new line
Inner reel bound up
Replace the inner reel
Cutting head dirty
Clean inner reel and outer spool
Line welded
Disassemble, remove the welded section and rewind
Line twisted when refilled
Disassemble and rewind the line
Not enough line is exposed
Push the bump knob and pull out line until 4 inches
(102 mm) of line is outside of the cutting attachment
C A U S E
A C T I O N
Old or improperly mixed fuel
Drain gas tank and add fresh fuel mixture
Improper carburetor adjustment
Take to an authorized service dealer for an adjustment
Fouled spark plug
Replace or clean the spark plug
Plugged spark arrestor
Clean or replace spark arrestor
C A U S E
A C T I O N
Empty fuel tank
Fill fuel tank with properly mixed fuel
Primer bulb wasn't pressed enough
Press primer bulb fully and slowly 10 times
Engine is flooded
Squeeze the trigger and pull the starter rope
Old or improperly mixed fuel
Drain gas tank and add fresh fuel mixture
Fouled spark plug
Replace or clean the spark plug
Plugged spark arrestor
Clean or replace spark arrestor
ENGINE WILL NOT START
ENGINE WILL NOT IDLE
ENGINE WILL NOT ACCELERATE
ENGINE LACKS POWER OR STALLS WHEN CUTTING
C A U S E
A C T I O N
Air filter is plugged
Replace or clean the air filter
Old or improperly mixed fuel
Drain gas tank and add fresh fuel mixture
Improper carburetor adjustment
Adjust according to the Carburetor Adjustments section
C A U S E
A C T I O N
Old or improperly mixed fuel
Drain gas tank and add fresh fuel mixture
Improper carburetor adjustment
Take to an authorized service dealer for an adjustment
Cutting attachment bound with grass
Stop the engine and clean the cutting attachment
Dirty air filter
Clean or replace the air filter
Plugged spark arrestor
Clean or replace spark arrestor
CUTTING ATTACHMENT WILL NOT ADVANCE LINE
C A U SE
A C T I O N
Oil, cleaner or lubricant in cutting head
Clean and thoroughly dry the cutting head
CUTTING LINE ADVANCES UNCONTROLLABLY
TROUBLESHOOTING