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Engine running rich after carburetor rebuild

The carburetor or ? is making the engine run rich. The forklift spews black smoke and won't idle correctly. The previous mechanic had the Carb apart about 10 times and could not get it to run lean.

I need to get this engine to run lean as it did in the past.
This is a 1978 gas engine 6 cylinder forklift.
  • Posted 22 Jun 2011 11:20
  • Modified 22 Jun 2011 11:20 by poster
  • By bigequip
  • joined 22 Jun'11 - 6 messages
  • California, United States
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Showing items 1 - 3 of 3 results.
you will most likely need to replace the carb float.
  • Posted 23 Jun 2011 20:15
  • By edward_t
  • joined 5 Mar'08 - 2,334 messages
  • South Carolina, United States
"it's not rocket surgery"
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We did a tune up. The carb float was never adjusted but may be out of spec. The engine still runs rich with the air filter off.

Thanks for your info.
  • Posted 22 Jun 2011 20:49
  • By bigequip
  • joined 22 Jun'11 - 6 messages
  • California, United States
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there are quite a number of things, any of which can make the engine run rich. have you done a correct and complete tune up? have you replaced the correctly adjusted the carb float when you had the carb rebuilt?
I think a new carb would be less expensive than tearing it out and apart more than about 4 times. and is it correct to assume the engine still runs rich with the air filter off?
  • Posted 22 Jun 2011 20:24
  • By edward_t
  • joined 5 Mar'08 - 2,334 messages
  • South Carolina, United States
"it's not rocket surgery"
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The word "robotics" was coined by Russian-born American science-fiction writer Isaac Asimov who first used the word in 1942 in his short story 'Runabout'. He characterised robots as helpful servants and as "a better, cleaner race."