Ryobi lawn trimmer keeps stalling out. I have

Hi Frank, The only 3 main things to go wrong are Fuel, Fire and air. If it's firing ok with a spark and you have changed the carbueretor check the air filter isn't blocked with old oil and grass. Wash it in warm soapy water and then dry thouroghly. You could check if it runs without the air filter on. You must also make sure that fuel is getting into the block. Any problems get back to us. John

check the spark plug if fine, then an 1/8 of a turn on the screws until it runs correctly, Tim

Here are the basics. You need: spark, fuel, air, compression, and timing to make it run. Clean the spark plug. Inspect the fuel lines. Are the hard/brittle? Do they connect to the filter in the gas tank? Clean the air filter. When the spark plug is out, put your finger over the opening and gently pull the rope. Do you have compression?
Most common repairs needed are usually fuel lines and carburetor work.

This is a problem with most ryobi tools. From what i've read over time the gas lines shrink and need to be replaced. You'll need to replace both the lines coming from the carb to engine and the one connecting to your primer bulb. I hear there is a kit that contains both the primer bulb and fuel lines for this exact problem.

Are you running a gas/oil mix? If you are try making sure you didnt add too much oil (will usually smoke) and will possibly stall. Your air fuel mixture may be off and need adjusting too.

I have a ryobi doule line bought in 1997..Had same problem put new gas cap on and problem solved..could not get air in....

You have a air leak between to tank and motor. Could be carb gasket. When using in tilted position you dont have gravity feeded carb anymore, causing air to be sucked into carb. Take off carb and spray with crb cleaner, then blow out with air gun. Replace gasket, make sure all new lines and bulb connections are connected securely.

you are right on. try richer mixture.

Hi

Check the spark at the plug,compression and carburation.Clean the air and the fuel filters.Check the muffler.

best regards savumihai71

Ryobi is Japanese for "Piece of ****" My suggestion is to throw it out!
My 767r has had fuel line and carb trouble from day one. I'll never buy another Ryobi or Craftsman tool again.