TROUBLESHOOTING

PROBLEM

CAUSE

ACTION

Engine will not start

Ignition switch is OFF

Turn switch to ON

 

Empty fuel tank

Fill fuel tank

 

Primer bulb wasn't pressed

Press primer bulb fully and slowly

 

enough

5-7 times

 

Engine flooded

Use starting procedure with choke

 

 

lever in the RUN position Pg. 12

 

Old or Improperly Mixed Fuel

Drain fuel tank / Add fresh fuel

 

 

mixture

 

Fouled spark plug

Replace or clean the spark plug

 

 

 

Engine will not idle

Air Filter is Plugged

Replace or clean the air filter

 

Old or Improperly Mixed Fuel

Drain fuel tank / Add fresh fuel

 

 

mixture

 

 

 

Low idle speed

Improper carburetor

Adjust per instruction Pg. 19

 

adjustment

 

 

 

 

Engine will not accelerate

Old or Improperly Mixed Fuel

Drain fuel tank / Add fresh fuel

 

 

mixture

 

Improper carburetor

Take to an authorized service

 

adjustment

dealer for carburetor adjustment

 

 

 

Engine lacks power or

Cutting head bound with grass

Stop the engine and clean the

stalls when cutting

 

cutting attachment

 

Dirty air filter

Clean or replace the air filter

 

Old or Improperly Mixed Fuel

Drain fuel tank / Add fresh fuel

 

 

mixture

 

Improper carburetor

Take to an authorized service

 

adjustment

dealer for carburetor adjustment

 

 

 

Cutting head will not

Cutting head bound with grass

Stop the engine and clean cutting

advance line

 

attachment

 

 

 

Cutting head 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 the line

 

Line twisted when refilled

Disassemble and rewind the line

 

Not enough line is exposed

Push the Bump Knob and pull out

 

 

line until 4 in. (102 mm.) of line is

 

 

outside of the cutting attachment

 

 

 

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Ryobi 766r manual Troubleshooting, Problem Cause Action