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Subject: Carb still drips fuel

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NTP    Posted 09-13-2017 at 00:19:26 [URL] [DELETE]        [Reply] [Email]  
  • Carb still drips fuel
  • I posted a couple of days ago about carb dripping through the hole with the horse hair. Took the carb off again to be sure I had the 1/4 inch on the float, and also that the gasket on the fuel valve was installed. Reinstalled the carb and it still drips. Should I increase the 1/4 float adjustment? That is about all that I can see that allows the fuel to drip.

    Rustyal    Posted 09-16-2017 at 09:12:03 [URL] [DELETE]        [Reply] [No Email]  
  • Re: Carb still drips fuel
  • I've had the rubber tip get stuck closed. And not let any fuel get to the carb. You could try just installing the top half to see if fuel leaks at the valve.

    james alcock, Or.    Posted 09-13-2017 at 22:03:11 [URL] [DELETE]        [Reply] [Email]  
  • Re: Carb still drips fuel
  • Make sure the float is not scraping on the inside of the body, not letting it seat the needle valve.

    r geiger    Posted 09-13-2017 at 10:39:45 [URL] [DELETE]        [Reply] [No Email]  
  • Re: Carb still drips fuel
  • make sure the float does not have fuel in it.

    steveVa    Posted 09-13-2017 at 09:38:43 [URL] [DELETE]        [Reply] [No Email]  
  • Re: Carb still drips fuel
  • Sounds to me like your float valve seat is not sealing completely. You can try a different one, or try the old one if it was not leaking.

    Tim Daley(MI)    Posted 09-13-2017 at 05:20:54 [URL] [DELETE]        [Reply] [Email]  
  • Re: Carb still drips fuel
  • HHHMMM. I didn't know they used horsehair filters. I thought they were all the sintered bronze ones. Anyway, Is your carb a Marvel-Schebler TSX 33 or TSX-241 carb or an newer aftermarket style? I wouldn't muck around with the float anymore. When you set the 1/4" gage spec, was it with the gasket on or without? It should be gaged with the gasket on. Did you check the gage setting from both sides of the float? I've found many that were bent unequally; one side checked good and the other was way off. The original M/S TSX-33 Carb Specs say to set the float level to 9/32" (.281") and it was only when they released the TSX-241 carb with the Economizer Jet added that they went to the 1/4" gage dimension. If you wish, you can send me the carb and I will look at it and check it over, inside and out. My email is open...

    Tim Daley(MI)

    NTP    Posted 09-13-2017 at 07:10:34 [URL] [DELETE]        [Reply] [Email]  
  • Re: Carb still drips fuel
  • Tim, thanks for the reply. The filter definitely is not sintered bronze. I set the float with the gasket in place. Both sides of the float sure looked equal to me, no obvious differences. I will try the 9/32 measurement. The float level appears to be the only reason it could drip. The carb had worked fine for the 10 years I've had the tractor

    Tim Daley(MI)    Posted 09-14-2017 at 05:00:42 [URL] [DELETE]        [Reply] [No Email]  
  • Re: Carb still drips fuel
  • I'd leave the float gage dimension as it is set now at 1/4". I don't think that is the root cause of the problem. All parts wear, and ten years between carb rebuilds is awesome, but not uncommon. I've worked on probably hundreds of the M/S carbs and have received some that looked like they were never rebuilt after they left the Borg-Warner factory. When you rebuilt your carb, did you install the new float seat, gasket, and needle valve? Some new needle valves have a rubber tip and seem to wear faster than solid brass ones.

    http://www.ntractorclub.com/howtos/pdfs/Carburetor-Overhaul.pdf

    Gaspump    Posted 09-13-2017 at 15:24:29 [URL] [DELETE]        [Reply] [No Email]  
  • Re: Carb still drips fuel
  • All earlier TSX-33's used the horse hair like medium held in place by a staked washer.

    Tim Daley(MI)    Posted 09-13-2017 at 18:22:46 [URL] [DELETE]        [Reply] [No Email]  
  • Re: Carb still drips fuel
  • I'll have to look better as I just did a few 33's. I did notice some looked different but my focus was on getting thru the tumbler, blaster, cleaning, painting, then assembly. Learn something new all the time...

    Tim Daley(MI)

    JMOR    Posted 09-13-2017 at 04:42:38 [URL] [DELETE]        [Reply] [No Email]  
  • Re: Carb still drips fuel
  • check fuel level in bowl. check gasket.




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