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Carb boiling

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KB

10-06-2002 16:58:11




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I have heard many times about boiling a carb before rebuilding it. Now the stupid question is what exactly is that and how can I do it? The next really stupid question is does this apply to both Al and cast iron carbs or only cast? Thanks for the help in advance and helping out the dummy.




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Doug B

10-07-2002 07:02:28




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 Re: Carb boiling in reply to KB, 10-06-2002 16:58:11  
KB, here's what I do.... get a container that the whole carb will fit into and be covered by the solution. ie. one of your wife's big cast iron pots. Dismantle the carb (cast only) making sure all the plugs and shafts,and bushings are removed. Loose gaskets need to be removed, but stuck ones will lossen up after the "boiling". I use a water/vinegar solution for this, I have never measured this.. most of the time my pot isnt very big, so a mixture of 70 parts water and 30 parts vinegar would be a good guess.
Next you have to have a good fire, I use a camping stove that runs off of propane, a turkey boiler would work great, you see alot of them nowadays. Dont use the wife's stove unless you want thrown out of the house!! It will stink!
Boil at least 1 hour, then let it cool down, and rinse with warm water. Blow out all passage ways imeadiatly! Now use a fine wire and visually check and see if the wire can be seen at the other end of the hole. If you cannot see the wire, clean the hole. Robert's Carb. shop sells a set of drill bits that fits the two differnt sizes of holes, and works good for drilling out a plugged passageway.Install all parts and paint the carb for a professional job.

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Paul from MI

10-06-2002 17:20:28




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 Re: Carb boiling in reply to KB, 10-06-2002 16:58:11  
As I remember it would only apply to a cast iron carb., and then all the brass or bronze parts need to be removed first. It is basically soaking hte carb body in a heated caustic solution to remove all grease varnish etc. It will absolutely ruin any aluminum part. After treatment parts will rust immediatel, so you need to be ready to oil or paint them right away.
Good luck,
Paul



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