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PostPosted: Sun Aug 06, 2017 2:34 pm 
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Hi everyone I have a Ryobi s430 strimmer and it starts up for a couple of seconds then dies. It doesn't have a high low on the carb just one screw has anyone seen this or can help thanks


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PostPosted: Sun Aug 06, 2017 3:31 pm 
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It sounds like fuel starvation. If you look in the fuel tank there is a little filter on the end of the feed pipe and these can get clogged or gummed up. Start there, as it is the easiest to do. Also fresh fuel mixed to the correct ratio as stale fuel can cause issues.

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PostPosted: Sun Aug 06, 2017 3:50 pm 
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I'll have a look at that tomorrow has fresh fuel but didn't check the filter


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PostPosted: Sun Aug 06, 2017 4:33 pm 
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Is it a 4 stroke? I know some Ryobis are.
If it is then I'd assume it doesn't take 2 stroke mix. Check it.
Could be as DWD says. Also blocked fuel line(s) ditto fuel cap vent.
If it still won't go I'd strip the carb, clean with carb cleaner and compressed air, and try again. Try to be as clean as possible when working on the carb. Clean place to work, and sheets of clean paper. Clean the outside first.


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PostPosted: Sun Aug 06, 2017 5:00 pm 
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Yes it a 4 stroke so doesn't need a mix at first I thought the fuel filter should be ok as the primmer bulb fills up but I'll give it a check it just starts on the pull dies then after about 1 min try again and it does the same starts for a second then dies.


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PostPosted: Sun Aug 06, 2017 5:37 pm 
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It's almost certainly fuel related. Tiniest bit of muck or lacquer build up in those tiny carbs and they play up.


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PostPosted: Sun Aug 06, 2017 7:26 pm 
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I was looking at getting a new carb that has the high and low needles but carnt find one as yet


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PostPosted: Mon Aug 07, 2017 6:22 pm 
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I checked the fuel filter and that ok I took off the carb and cleaned it but noticed that there is no gasket between the carb and engine. When I put it together and primed it fuel was running down in-between the carb and engine


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PostPosted: Mon Aug 07, 2017 6:57 pm 
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There'll only be one carb that's right for the machine. That'll be an identical straight replacement.
Was there a gasket there to start with? If so it needs one there.
There shouldn't really be any petrol running anywhere. Sounds like it's flooding.


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PostPosted: Mon Aug 07, 2017 7:47 pm 
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There wasn't one but I got it off someone else who could of taken it off. I took the spark plug out and cleared the engine but noting came out so don't think I flooded it but quiet sure there would of been a gasket there


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PostPosted: Mon Aug 07, 2017 7:58 pm 
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It's usual for there to be a gasket.
Trouble with kit that's been got at before, is you never know what's been done.
Plenty of carbs on eBay etc. Should be easy enough to find the right one. There should be a maker and number on it somewhere.
I had a quick look, but the ones I could see were mostly the 2 stroke ones, with "hi / lo" screws.
I think the screw on yours might be just an idle adjust.


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PostPosted: Mon Aug 07, 2017 8:17 pm 
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Yes think your right about the screw I've got some gasket paper so I'm going to try making one tomorrow will let u know how I get on not expecting much


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PostPosted: Mon Aug 07, 2017 8:32 pm 
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That's what I'd do. I had to get a rebuild kit for the Zama carb on my McCulloch. I'd cleaned it a couple of times, but it was still dying after a bit. The kit cured it, but I still don't really know what was wrong.
That's a 2 stroke though.
Sorry to not be any more help.
Good luck with it.


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PostPosted: Sun Aug 20, 2017 6:30 pm 
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I have ordered a new carb for it but it is coming from China so it's going to take a while will let u know if it works


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PostPosted: Sun Aug 20, 2017 8:35 pm 
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I had similar problems with mine last year. A guy at work told me to put some carb cleaner in the tank and leave it overnight and voila it worked fine after wards. Think I bought it from Halfords.


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