Maybe this will help, maybe not. I saved this a while back, don't remember the source. No warranties implied, use at your own risk.
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Make your own carb cleaner
1. = Parts gasoline
1. = Parts diesel / kerosene
1. = Part MEK or Acetone
.5 = Parts auto trans fluid
Keep in sealed metal container when not in use.
WARNING:
Keep rags with this mixture on THEM out in the open air or in a ventilated metal container.
EXTREMELY COSTIC AND FLAMMABLE!!!
This mixture will melt most gunky deposits as good and as and as fast as carb cleaner.
Note: cold parts cleaner you buy in gallon cans is EXTREMELY CAUSTIC TO THE NERVOUS SYSTEM, AND CAN CAUSE SHOCK!
It also can eat aluminium
Source(s):
30 + Years Master Tech, and carb expert.
Here is another recipe that WORKS.
90% kerosine (diesel will work too but it's smelly) and 10% Methyl Cloride paint thinner from a hardware store. Methyl Cloride is the active ingredient in commercial carb cleaner. Use the highest concentration paint thinner you can find - 990gm per liter Methyl Cloride (or what ever the USA equivalent is) if you can find it. Watered down paint thinner won't mix in the kero as well as the concentrated stuff.
Keep it in a metal tin (3lb coffee can or similar) with a tight lid and it will store for a long time and you can reuse it over and over (an overnight soak works best).
Paint thinner is bad on skin and eyes - use rubber gloves and don't breath the fumes.
The two best cleaners for carbs..one previously mentioned, are methylene chloride and MEK (methyl ethyl ketone) . By the way.,..they are/were the primary ingredients in a product you used to be able to buy....called "chem dip". It came in a gallon can with a built in parts basket...made just for carbs.....nasty stuff!
Also by the way...both chemicals cause liver damage, nervous system damage and are both carcinogens. In fact, MEK usage has been outlawed in 48 states for usage over 1 gallon at a time without permit and OSHA/EPA inspection......but you can buy quarts and gallons at home depot. Just be very careful with it.
You can simply add MEK with either xylene or 90% isopropyl alcohol to make a decent carb soak. The MEK does the work. The xylene simply raises the flash point so it does not just go screaming out of the can.