e carb as I have a 4-5 yr old machine. After I did and I put all parts back, I now noticed that when I press the primer bulb it is not filling with much fuel, mainly air and it now won't start. Any suggestions please?
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If your RYOBI Edger isn`t starting: For 18V or 36V Battery models: check the battery has charge by pressing the fuel gauge. For AC models: turn the power point switch off and check the cord is inserted correctly in the extension lead. Use a heavy-duty extension lead no longer than 25m for optimal performance.
The most common problem with a strimmer not starting is that there`s a problem with the fuel mix. Double check that you`ve used 40 parts fresh unleaded petrol to 1 part 2-stroke oil (40:1). Check the petrol you`ve used isn`t stale.
A clogged carburetor is most commonly caused by leaving fuel in the string trimmer for a long period of time. Over time, some of the ingredients in the fuel may evaporate, leaving behind a thicker, stickier substance. This sticky fuel can clog up the carburetor and cause the engine to stall.
The most common problem with a string trimmer is that the unit runs out of string. The string may also be twisted or loose on the spool. The cutting head may be dirty or the head outlet guide may be bent. An electric trimmer`s power cord, switch, or motor may fail.
A clogged carburetor is most commonly caused by leaving fuel in the string trimmer for a long period of time. Over time, some of the ingredients in the fuel may evaporate, leaving behind a thicker, stickier substance. This sticky fuel can clog up the carburetor and cause the engine to stall.
Just Like Spark plug fouling, too much oil in the gasoline, inferior oil, a dirty air filter and/or continued operation at less than full throttle will plug the screen with carbon deposits. This prevents exhaust gases from flowing out, which leads to power loss or not running at all.
Trim, slash and edge grass with the RYOBI 36V 40cm Brushless Line Trimmer Kit. It comes with a 4.0Ah battery and a 1.7A charger. The trimmer`s brushless motor gives it the power and runtime to cover large yards. You`ll get up to 42 minutes on high speed or 60 minutes on low speed using the included 4.0Ah battery.
If the carburetor is new or has been rebuilt, you should set it to “factory” adjustment. You can do so by adjusting the idle mixture screws to 1.5-2 turns out, and the idle speed screw to 1-1.5 turns in. Warm the Engine Up. The engine`s running temperature directly correlates with proper air and fuel mixtures.
Tightening the screw increases the amount of fuel, while loosening decreases the amount of fuel. When making any adjustments, it is also important to make them in small increments of a quarter turn. This will prevent any major fuel changes that could dramatically affect the performance of the engine.

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The machine starts when the primer is full. As soon as the primer has emptied the machine stops.It seems as though no fuel is getting to the carburettor.
ANSWER : That is indeed the case, fuel is not getting to or through the carburetor. Check the fuel line, including the filter in the tank. Then check the carburetor, clean it if necessary, replace the diaphram in the carburetor. The diaphram is also the fuel pump of the carburetor. Be very careful with the small parts including the little spring in the lower end.

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Have a craftsman 16″ chain saw 358.360260. Could not initially get it started after it had sat for a couple years with fuel stabilizer in it. When I went to use it the fuel had all evaporated and the fuel pick line was rotted. I replaced that with some difficulty but finally got it on. Saw still wouldn’t start. Replaced the fuel filter. Still wouldn’t start. Pulled the carb apart and cleaned and recleaned everything. Diaphragms were good and I didn’t adjust any of the mixture screws because as I said it ran fine before storage. Non of the carb passages were clogged. Fresh gas 40:1, good spark plug and good spark. Airfilter is good. Engine has maybe about 4 hours of total run time on it. It’s a ZAMA (?) carb. It will run for about 30 seconds when I manually prime it by pouring a small amount of fuel directly though the carb. When I was disassembling the carb the vent hose that goes back into the fuel tank seemed to have a small out of ?substance? in it which I cleaned out. It was right at the end the of the hose that goes back into the fuel tank and not up by the carb. It didn’t appear to be like your typical gummy deposits/varnish though. I hope it wasn?t some type of spongy check valve stuff that is supposed to be in there. That might explain some of my problems. Anyway, I also can not seem to get the primer bulb to fill. When I open the fuel tank, look in side and depress the primer bulb, air bubbles come out of the fuel filter. But when I let the bulb reexpand there’s no fuel that gets sucked up the hose. I can however seem to fill the primer bulb when the fuel tank is full and the chainsaw is laying on it?s pull cord side and the bulb is depressed a bunch of times. The saw will also start and run again for about 15 seconds then die. It’s definitely not getting/fuel and probably running out . Thanks.
ANSWER :

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The primer ball will not fill with fuel. – Echo Zama Carb Kit For Shc210 For Rbk66b Rbk70 Carb
ANSWER : Sounds like you either have a hole in the fuel line or the primer bulb valve is leaking and drawing up air instead of drawing the fuel out the tank

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Need to replace primer bulb and fuel lines, is there a digram that shows the connections?
ANSWER : Http://www.ereplacementparts.com/images/fuel_line_diagram.jpg

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My trimmer is leaking fuel help – Ryobi 30 Cubic Centimeter Curved Shaft Gas Trimmer
ANSWER : Change your primer bulb and/or fuel lines.

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My Ryobi start great but when I change it from start to run stays few seconds and died
ANSWER : Alow the engine to run for longer on the start setting before you switch to run

Ensure air filter is clean. Foam elements can be washed
with hot water and detergent. Paper elements can be cleaned with
compressed air blown from the inside of the filter but ideally should be
replaced.

Check fuel lines aren’t kinked or blocked restricting fuel flow.

Ensure fuel filter isn’t dirty. This is probably located at the end of the fuel line in the tank.

The fuel lines may have become airlocked.This can
happen if the tank is run dry. If the trimmer has a primer bulb,
alternatively press it several times and then try to pull start the
engine with choke on. Repeat this several times. The primer bulb should
feel spongy and fill with fuel.Once the engine kicks, switch to run.

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My ryobi will start but dies about 5 minutes later
ANSWER : Try running the machine with the gas cap loose. There could be pressure builiding up in the system due to the cap being too tight. There is no vent on these systems like an automobile. If the gas cap is overtightened this could be your problem as the cap is equipped with a gasket that allows the vapor to vent through the cap. Overtightening could be sealing off your vent

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I have a craftsman 25 cc string trimmer with fuel problems. After winter, ran tank of good fuel through it and it worked fine. Added fuel (unknowingly with water in it) and it ran on a slow idle and finally died. Drained fuel, took carb apart and cleaned, blowed out carb and reassembled. Still only ran on a slow idle – no throttle response. Took cover off with air cleaner and it ran fine. Seems to blow too much fuel out where filter sits. Put filter back on and runs on slow idle. Almost seems it is flooding, but have not adjusted anything, just cleaned. What do I need to do next?
ANSWER : You shouldn’t notice a difference if you remove the air filter. So I would replace it. Also if you are using compressed air to clean or blow-out the carb. Be careful, its not recommended and could make it worse.

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