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Allis Chalmers Discussion Forum
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WD45 no-start - overfueling?

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Vic Lovejoy

09-10-2004 15:56:20




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I recently rebuilt the carb and installed exhaust manifold gaskets on my WD45 and have been using it to move hay. When I tried to start it yesterday it wouldn't start, so I did some troubleshooting. I checked the plugs and they all seem fine; some black buildup but it seems normal. I wondered if the air filter might be clogged so I pulled the air hose off the carb and cranked the engine over. It still didn't start, and when I stopped cranking I noticed a big splash of gas out of the carb. I looked into the air hose and sure enough it's soaked with gas.

Has anyone experienced this and know what the problem is? I can only think it's getting too much fuel or the float is stuck.

I haven't tested it for spark yet.

Any advice would be greatly appreciated.

vic

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Steve in N.J.

09-13-2004 19:24:26




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 Re: WD45 no-start - overfueling? in reply to Vic Lovejoy, 09-10-2004 15:56:20  
Vic,
Check your float level and the floats themselves taking on fuel. Take the floats out, gently shake them. If you hear sloshing, they're taking on fuel and sinking causing the flooding. As Dave said, black soot on the plugs is a rich condition. Probably because of the carb problem. Better check to make sure there isn't any gas in the crankcase. An overfueling condition contaminates motor oil....
Steve/B&B Custom Circuits

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dave k

09-11-2004 06:51:39




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 Re: WD45 no-start - overfueling? in reply to Vic Lovejoy, 09-10-2004 15:56:20  
Did you check to see if the choke is open? There is a return spring on the choke linkage that should hold it open unless you are pulling on the choke rod. If that sticks or is missing your choke may not be opening. It is also possible your float is sticking and backing up into the air intake hose. You really should not have any black soot on your plugs. They should be a light chcolate brown and not black soot. Could be you just are not working it hard enough or long enough to keep the plugs clean.

Dave

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