I have a just bought a smith 100D 100 cfm 125psi 302 ford, tow behind compressor .
As soon as it starts it runs wide open and when I close the main air valve that goes to the hose the motor dies . Does it ever go to IDLE ? Is this normal ?? Thanks, Loren, Dickens Iowa.

Smith 100D tow behind construction air compressor
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Might be pressure sensor
No, this is not normal. Could be pressure sensor or engine control stuck/jammed.
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Leak in after cooler
I found a leak in the after cooler will this cause the unit not to idle down? And if so is it a big job to fix it? Thank You, Loren
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Let it warm up first!
Let it run for a minute with valve open. Lets the engine warm up and it will not die out.
I am having a lot of trouble finding parts for my Smith 100gp tow behind compressor…specifically a carburetor. Any idea where to get this? I can’t find anyone that knows anything about these compressors, asks Shelley.
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Shelly – its a Ford 302. I’m attachng a manual. Doug from s.d.ca.
it looks like a Lindsay set up it up so there is a air valve that shuts down throttle commin to stick. Find and take the top off, careful not to drop washers, clean and put back together.
Or governor rod rusted in pivot, use some pb blaster or take out and sand and grease.