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DLTX-71 woes

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poorerbut

09-16-2002 06:06:36




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I've had this one apart,cleaned and renewed parts,
checked the ports and nozzle half a dozen times,
done everything I can think of and the needle adjustments don't seem to do anything. I've done
everything by the book and still can't find the
problem. I've done several of these over the years
but his one's got me buffaloed and it's starting
to get personal. The tractor still loads up at
fast idle and starves out at low idle.
What have I missed ?????

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WTW

09-16-2002 10:54:31




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 Re: DLTX-71 woes in reply to poorerbut, 09-16-2002 06:06:36  
porrebut, Do what Clooney has suggested first if you haven't already done so. After cleaning all the little holes and passages, check to see if the idle circuit is open by turning the idle mixture screw down against it's seat, take a can of brake clean or pentitrating oil with a straw on the nozzle and blow fluid through the entire idle passage. Do so be putting the end of the straw at the air entry of the idle circuit which is at the side of the venture when looking in the choke end of the carburetor. The fluid should travel from this point all the way through the cleaned passages and out the small holes that Clooney told you the check located at the edge of the throttle plate. Be careful not to squirt yourself in the eye as I been there and done that. If the circuit is found clean the next thing to check is the bowel vent. The 71 gas carburetor has two brass deflectors / baffels drove into a bore that is located just above the float on the main body. You may have to pry them out to get them clean as I have had to do so. Again when they are clean they too can be rinsed with a can of parts cleaner when the passage from the choke end of the carburetor is induces with some fluid. This is a different passage than the idle circuit, located in the notch at the side of the choke end bore. Look at it and study it as you will see how every thing is connected. Bowel vent very well could be your problem?? Good Luck, Dave W.

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poorerbut

09-17-2002 05:49:09




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 Re: Re: DLTX-71 woes in reply to WTW, 09-16-2002 10:54:31  
That's what I missed !!! I was going over the
carburetor parts breakdown ONE MORE TIME last
night and finally saw the bowl vents (2).
I don't remember even seeing them . Well, off
she comes again tonight . Thanks, fellas.
(I better stick to using the magnifying glass)pb



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Clooney

09-16-2002 08:52:03




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 Re: DLTX-71 woes in reply to poorerbut, 09-16-2002 06:06:36  
poorerbut , it kind of sounds like the idle transfer holes are plugged, or partially plugged. Those holes are in the side of the throttle bore [inside the bore, & will be on both sides of the closed throttle plate].
~You will probably have to pull the throttle plate to see them. There is a brass screw on the outside of the throttle bore almost directly across from them. ~There will be 2 & even possibly 3 of those holes [1 on the intake side of the closed throttle plate & 1 or 2 on the venturi side of the closed throttle plate. If those holes are rusted shut they are very hard to see & find. ~Use a soft wire to clean them, if you change the hole size the carb will be hard to get to meter correctly at slow, off, & mid idle positions.
~If those holes are open, make sure the idle system fuel entry hole in the bottom of the stem if fully open [again, if rusted shut it is hard to find]..... ....

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