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Classic Truck Discussion Forum

R-110 only idles at 1/4 choke

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StrongsOlivers

06-29-2016 11:24:40




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My sd220 will only idle at 500-600 rpm with about 1/4 choke no more no less. So I tried the idle screw and nothing. I turned it all the way in and it still stayed at 500 rpm. It been like those since I bought it. But the other day my starter quit and I took the manifold off to get to it easier. I reassembled and went to start it and a quarter choke bumped the key and ran like a top. So set the rpm at 900rpm. Ran like this for a week. I noticed it was low gas so I put 5 gallons in and put it away for the night. Next morning I went to start it and it was back its old games. I cleaned the fuel filter thinking I stirred some dirt in the tank, but was fine. I found vacuum leak but I tightened it some more it pretty much sealed, but still leaks a tad but it better. But it still run 500rpm and rich. So what would be the cause?

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JDIH

07-01-2016 15:52:09




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 Re: R-110 only idles at 1/4 choke in reply to StrongsOlivers, 06-29-2016 11:24:40  
I'm not familiar with the vehicle you're working on, but generally when partial choke is needed you have a plugged/partially plugged jet or passage in the carb



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JDIH

07-01-2016 15:51:50




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 Re: R-110 only idles at 1/4 choke in reply to StrongsOlivers, 06-29-2016 11:24:40  
I'm not familiar with the vehicle you're working on, but generally when partial choke is needed you have a plugged/partially plugged jet or passage in the carb



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