Question about Ryobi Cultivator

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Replaced gas line and primer bulb. cleaned carb, but not sure which direction the diaphram goes in. Machine idles but spits gas from top of carb and dies when throttle is pushed. Gas line routing? Seems like bulb and return line have air in them.

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  • thor1115 Jun 19, 2009

    Hi,

    Am working on an older Ryobi 410r with a WT340 Walbro carb.

    I'm leaning towards replacing the diaphram as it will start at idle but, unable to throttle as it will die when throttle is pushed and haven't been successful adjusting the mixture screws after turning 1 1/2 turns out. Dissasembled and cleaned the carb and the diaphram seems sloppy and worn.

  • same463 May 11, 2010

    Need to know what kind of equipment you are working on.

    Usually if there is air in the bulb and/or return line it is a sign of a hole in one or the other or both.

    But if you have already replaced the bulb and gas lines this doesn't sound like the problem.



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If the engine dies when you try to speed it up chances are your muffler is the problem. Any equipment that uses a gas/oil will eventually have a stopped up muffler due to carbon buildup. This restricts the air flow and the engine won't run or open up. First take the muffler off and see if you can start and adjust the carb with it off. Turn both the air and the gas adjustment screws all the way in, then back them both out one and a quarter turns. Start from there.
Unstop the muffler by throwing it in an open fire for 10 to 15 mins or using a torch to burn the carbon out. There is a screen in the muffler that I would toss out (unless you live in California) for the only purpose it serves is catching carbon. Let the muffler cool on its own, don't cool with water or you will warp it and it won't seal right. Also while the muffler is off check the muffler port and scrape off any buildup there with a knife. Hope this helps.

Posted on Jun 19, 2009

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