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Emory 
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Joined: 29 Sep 2013
Location: Pine Grove PA
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 Topic: 1968 Allis Chalmers B110 flooding!
Posted: 30 Jul 2014 at 5:45pm |
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My B110 is driving me nuts. It will run full throttle at governed rpm without flooding and good power. When throttle is cut back to below full governed speed it start loading up on fuel in the lower carb body and dripping out the weep hole to the point of eventually flooding out and stalling. Adjustments are "a ok" and no float issues. Anyone out there with similar issues?
Also note, it is a brand spanking new carb.
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CTuckerNWIL
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Joined: 11 Sep 2009
Location: NW Illinois
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Posted: 30 Jul 2014 at 7:53pm |
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Sounds like a "float issue " to me. When the float floats it isn't shutting off the fuel flow or the float won't float and shut off the fuel flow.
Edited by CTuckerNWIL - 30 Jul 2014 at 7:54pm
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HudCo
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Joined: 29 Jan 2013
Location: Plymouth Utah
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Posted: 30 Jul 2014 at 9:40pm |
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boil the float and see if it leaks also make sure the nozzle is seated inthe carb you you may have to dress the nozzle seat in the carb it can leak a tank of gas out fast i see this allthe time in the flo jets
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Steve in NJ
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Joined: 12 Sep 2009
Location: Andover, NJ
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Posted: 01 Aug 2014 at 7:00am |
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Just cause its brand spanking new doesn't mean its good. I'm wit' Tuck on this one. Sounds definitely like a float issue to me also whether its the float itself or some debris getting into the needle valve and hanging it up. Make sure your tank doesn't have junk in it. Maybe that's what took out the original carburetor. Also, if there isn't any fuel filter on it, put a gravity feed inline fuel filter on it from your local farm store for a little more insurance... HTH
Steve@B&B
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39'RC, 43'WC, 48'B, 49'G, 50'WF, 65 Big 10, 67'B-110, 75'716H, 2-620's, & a Motorhead wife
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Emory
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Posted: 01 Aug 2014 at 8:12am |
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I should add. It only does it while running. With engine off fuel on, carb stays dry.
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Emory
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Posted: 01 Aug 2014 at 11:06am |
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And also. It did the same thing with the original carb.
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HudCo
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Posted: 01 Aug 2014 at 6:57pm |
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check your valve lash lash makes big diff. in valve timing may have hard time making a vaccuum
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Emory
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Posted: 04 Aug 2014 at 8:21pm |
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Checked the valve lash tonight. Zero clearance. Thinking about it now my grandfather had the engine rebuilt over 20 years ago and I think this problem has plauged him for years since then I think (can't ask him now, he's no longer with us).
Stupid question, how do you guys recommend I grind the valve stem down to get correct clearance?
Thanks in advance.
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CTuckerNWIL
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Posted: 05 Aug 2014 at 12:22am |
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I have used a vernier or dial calipers. Measure the overall length, grind a bit and measure again. If you have a lathe and some carbide tooling that would be easier.
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HudCo
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Posted: 06 Aug 2014 at 11:23am |
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we have grinder set up just for this with a toolrest for the valve stem before you get to your clearance lap your valves because this will change your claerance a little bit also if you do not have a good pattern it still will not seal good
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