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Ryobi rlm140sp engine

Difficult to start, no pressure at priming bulb?

Posted by Anonymous on

6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

chad7houston
  • 62 Answers

SOURCE: ryobi gas trimmer

I don't mean to over simplify this, but are you using fresh gas? Gas string trimmers are extremely ticky when it comes to gas. They like it SUPER fresh. And while the gas and oil mixture should be right, it can be off a little bit and still run. Try draining all of the gas out, and then filling up with fresh mix. This is ALWAYS my first step with string trimmers, and it fixes the problem 75% of the time.
Hope this helps!!

chad

Posted on Oct 08, 2008

#1 Taper
  • 1040 Answers

SOURCE: Runs only briefly after priming

Yes, Depending on how old your trimmer is, one of two things is wrong. Either the carburetor just needs a very good cleaning, or you need to purchase a carb. kit and replace the small screen, gaskets, and needle valve. It would probably be good idea to do both if your trimmer is more than three years old and if you have never replaced parts on carb

Jim

Posted on May 30, 2009

  • 113 Answers

SOURCE: engine starts when I hand prime it,but not when I use prime bulb.

There are two screws on the carb. 1 is Lo rpm air/fuel ratio and the other is hi rpm. Try adjusting the lo rpm screw counter-clockwize a 1/2 turn at first, more if needed. After each adjustment try to start. The other thing you could check is if the float is sticking in the bottom of the carb. which shuts off gas flow if full. There is a screw on the bottom of the carb to drain that float. You can try that also! Good luck man!

Posted on Sep 21, 2009

dontbother10
  • 2220 Answers

SOURCE: Has Ryobi RCS 3535A chainsaw a fuel bulb priming

The numbers you supply don't cross to an operators manual but that is typical of Homelite/Ryobi. I'm going to make an educated guess that it does not have a primer system. Other Ryobi saws with primer systems include it in the specification. The 3535A does not. Close scrutiny reveals no primer.
IMO fuel primers on chainsaws are one more source of problems. In the USA ethanol additives attack fuel hoses. Without a primer routing is from the fuel tank directly to the carburetor and much simpler to replace. Primers on chainsaws operate differently than 4 cycle engines too. No fuel is injected into the carburetor or engine, its only purpose is to ensure the carburetor is full of fuel,
Typical Fuel hose routing:

  • The hose in the tank with the filter on the free end connects directly to the carburetor input connection.
  • If the saw is equipped with a primer bulb, an output line from the carburetor connects to the suction side of the primer (once the bulb is collapsed it draws fuel from the tank through the carburetor to refill as it inflates).
  • The pressure side of the primer returns displaced fuel to the tank as it is depressed.
bfe8bfa.gif
HTH
Lou

Posted on Nov 15, 2009

  • 183 Answers

SOURCE: Ryobi 30cc trimmer won't run. Difficult to start, hard to keep ru

chnge the plug for the best you can get then depending on the mix petrol oil mix u could cahnge that ie if its 50:1 go down to 40:1 or visa versa if that doesnt work bin it and get a sthil or an ehco

Posted on Jul 27, 2010

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1 Answer

Why won't my chainsaw prime?


if no gas will enter priming bulb at all I see only a few possible things for this
(1) gas line broken/melted
(2) filter looks good but has internal plug
(3) primer bulb has a small crack in it (most common )

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My prime bulb looses pressure and first start is hard. I have to remove fuel line from filter and cover with thumb prime re install then first start takes time.


Does the engine run fine after it starts? Most common problem with primer bulb losing prime is an air leak in the fuel line or primer bulb. Air leaks don't always leak fuel. If there is an air leak between the primer bulb and gas tank there is no pressure, only vacuum. If it is not a major leak it might not leak without pressure but it will allow air to enter the fuel line. If it is a very minor air leak it could allow air to replace the liquid in the fuel line over time, but so little air once it is primer again that the fuel pump can over come it with volume of fuel.

Primer bulbs do not stay firm, as they are when initially pumped up, after the engine is running. There are check valves in the primer bulb that hold pressure in the primer bulb and throughout the fuel line to the engine. Once the engine starts the fuel pump creates vacuum drawing fuel into the engine diminishing this pressure and releasing the check valves. At this point the primer bulb is just another segment of fuel hose allowing fuel to pass through it as the fuel pump demands. The primer bulb functions much better when the outlet side is higher than the inlet side. This position makes it easier for the check valves in the primer bulb to seat and release as needed. If the primer bulb is functioning properly and is positioned with the outlet side higher than the inlet it should not be necessary to cover the end of the fuel hose with your thumb to get it to prime.

If the engine is hard to start after being fully primed there could be a problem with the fuel system on the engine. Some engines are hard to prime once air has entered the system, especially fuel injected models.

Dec 19, 2014 | Boating

1 Answer

4 lawn mowers same problem wont start until I prime the by hand. Briggs Stratton 917.387500/ 12AV566n01124987/20043/SDSP2245D Will the same primer bulb fit the above mowers.


If its identical it should work ,if not take the old one to a mower shop,to get correct one and make sure the choke is going right on when the cable is in choke position.

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1 Answer

I have a ryobi rlm140sp, when I release the engine run handle the engine won't stop.. It slows down a little but keeps going.. I have to stop it by push ******* the throttle lever on the carb linkage..


You probably have grass and muck jammed up in the mechanism that engages the Self-propelled wheels. Take the cover off and clean it out. Then lubricate the cable at both ends with any spray lubricant. You may have to lubricate it for the next few days or weeks to get it to start working properly again.

Good Luck!

Jim

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Cant start ryobi 890r brushcutter


My Ryobi 890r brush cutter will start and then die

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1 Answer

Has Ryobi RCS 3535A chainsaw a fuel bulb priming


The numbers you supply don't cross to an operators manual but that is typical of Homelite/Ryobi. I'm going to make an educated guess that it does not have a primer system. Other Ryobi saws with primer systems include it in the specification. The 3535A does not. Close scrutiny reveals no primer.
IMO fuel primers on chainsaws are one more source of problems. In the USA ethanol additives attack fuel hoses. Without a primer routing is from the fuel tank directly to the carburetor and much simpler to replace. Primers on chainsaws operate differently than 4 cycle engines too. No fuel is injected into the carburetor or engine, its only purpose is to ensure the carburetor is full of fuel,
Typical Fuel hose routing:
  • The hose in the tank with the filter on the free end connects directly to the carburetor input connection.
  • If the saw is equipped with a primer bulb, an output line from the carburetor connects to the suction side of the primer (once the bulb is collapsed it draws fuel from the tank through the carburetor to refill as it inflates).
  • The pressure side of the primer returns displaced fuel to the tank as it is depressed.
bfe8bfa.gif
HTH
Lou

Nov 14, 2009 | Ryobi 18-inch Electric Chainsaw Chain Saws

1 Answer

Ryobi 790r gas trimmer


I can think of three possible causes that would be a good place to start looking:
- clogged tank ventilation, causing vacuum in the tank during use (check for this when opening the gas tank cap, you should hear a "suction sound" and the engine should prime and start afterwards)
- clogged fuel filter
- fuel filter/ fuel hose is not moving freely inside the gas tank causing it to **** air in some operating positions.

Good luck!

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1 Answer

Ryobi RY08576 25.4cc was started without mixed fuel


If the engine is sticky ie harder to pull it might have to be pulled apart new piston and honing of cylinder. not difficult just a pain. If it doesn't seem any harder to pull, Drain all of the unmixed fuel. Put a few drops of 2cylinder oil in the spark plug hole and pull the starter a few times with the plug out of it. Put a few more drops in repeat. Replace the plug (new plug) Put in mixed fuel prime the system cross your fingers and it should start up for you.

May 12, 2009 | Ryobi Backpack Blower 25.4cc

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Ryobi RLT30CES


I also tried this.

  1. Clean the carb wire gauze air filter behind the roto-choke knob. (undo the nut/washers & long bolt)
  2. Deteremine if fuel is being fed to cylinder - Fully depress & prime the bulb about 7 times, turn to full choke. Pull start cord about 7 times. Remove spark plug see/smell fuel fumes/vapour present in cylinder
  3. Determine if compression is weak - remove plug, put finger over plug port, pull start cord. Should be evident of resistance/pressure build up when cord is pulled.
  4. Of course brand new plug!!! as above (I would try this first)
Hope this helps
please rate my comments - Thanks
Aky1967

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