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Hot!Ryobi 4 Cycle Trimmer Run Issue

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SBlake
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2016/06/01 16:17:35 (permalink)
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Ryobi 4 Cycle Trimmer Run Issue

Couldn't get the unit to operating rpm's.  Replaced the in and out gas lines and fuel filter. Still couldn't get it to operational speed.  Replaced the carburetor with a new unit from Jack's; however, it now only operates at idle with full choke applied.  Think it might be the fuel mixture adjustment.  Any support of this assessment or other recommendations?  Thanks SBlake 

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    Mikel1
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    Re: Ryobi 4 Cycle Trimmer Run Issue 2016/06/05 12:40:46 (permalink)
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    That's what I would try to do since a new carb.
    MdStamen
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    Re: Ryobi 4 Cycle Trimmer Run Issue 2017/10/06 07:54:51 (permalink)
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     I am not sure what carb you have. It may be the idle stop screw. That stop adjusts the position of the idle jet for idle. If it only runs with the choke in idle it is starving. Turn the screw in a few turns and see if it will run without the choke. As the throttle turns it lifts the jet.
    I always check the intake and exhaust valves for the proper setting.
    Before you worry about high speed you need to get the idle fixed first!
    AVB
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    Re: Ryobi 4 Cycle Trimmer Run Issue 2017/10/06 13:31:19 (permalink)
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    Really need the model number to see what the setup is.
     
    But from my experience with the Ryobi and Troy-bilt 4 cyclers it not worth trying to fix them as they tend to destroy the piston and cylinder due to lack of proper oiling. A very poor design when it comes oiling. I only get about one out twenty to work once they start giving problems.
     
     
    vmax1200
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    Re: Ryobi 4 Cycle Trimmer Run Issue 2017/10/08 15:48:53 (permalink)
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    Make sure your fuel cap isn't causing an issue. Check the exhaust port and muffler. Make sure they're not restricted. And I agree, it definitely sounds like fuel starvation. And make sure you have the fuel lines on the right connectors. I would say you probably need a carb adjustment, but since you already replaced it, you should have noticed a difference. Might not have run perfect without a little tweaking but usually a noticeable difference.
    MdStamen
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    Re: Ryobi 4 Cycle Trimmer Run Issue 2017/10/11 18:21:15 (permalink)
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    And if it is a 430 R. They are a beezer to get started. And I dis-agree. Yes 4 cycle engines may have problems when they are ran in some positions too long. But they can be repaired easily.Unless the engine is locked up.
    BUT, I have a 990R 20 years old and still kicking. It is just impossible to get parts for.
    The 430 has a strange Ruixing. You can but the carb , but not the kit.
    Although Jacks has a excellent price for the carb.
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