RunRyder - How do you remove carbon build up in muffler?

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Gasser Model RC Helicopters > How do you remove carbon build up in muffler?

choeller
Heliman
Location: Whitehorse, Yukon, Canada

The best way to get rid of carbon is to use a product called Brulin. I use it on full scale helicopters to remove carbon deposits from fuel nozzles and other turbine parts. It is a great cleaner when mixed 10:1 with water and if poured in a muffler and left 3-4 hours ( full strength) the carbon just dissolves away and can be rinsed in the wifes sink. It also helps the drain pipes cast or plastic. It can be purchased at any aircraft supply store. We purchase it in gallon cans, so I'm not sure if you can get it in smaller containers. Try a helicopter maintenance facility and you may be able to get just a pint. It is a bit corrosive.

10-05-2003 Over year old.

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Mark222
Senior Heliman
Location: Kelowna, B.C. Canada

The muffler is now shiney clean inside!

There have been some "great" suggestions on this thread for cleaning out the carbon.

Xcellgasman:

I picked up an industrial degreaser solution from a local chemical blending company. The degreasers active ingredient is sodium hydroxide (caustic soda) and it took out most of the hard carbon after two overnight soaks in the solution, a wallpaper hanger tray works great for this. The muffler was 95% clean but I wanted something stronger to get the last bits out, my chemical supplier gave me a litre of full strength sodium hydroxide to mix with the jug of degreaser I had used before, this did the trick.
"Make sure to wear rubber gloves and wear eye protection, this stuff is strong".

Choeller:

The "Brulin" sounds like a product worth trying.

I will be doing a routine muffler cleaning from now on before the problem gets too severe, soft carbon comes out quickly. The sodium hydroxide does the job.

Thanks to everyone for all the suggestions.

Now to fix the cylinder gasket that blew out on the last flight! Hah! Never a dull moment lately!

Mark G.

10-05-2003 Over year old.

HOMEPAGE

Xcellgasman
Heliman
Location: United Kingdom

Mark

I am glad the caustic worked for you, it certainly did the trick for me!
As you say, WEAR GLOVES and googles too....caustic soda is evil stuff!! It gets very hot and volatile once water has been added, NEVER add water to Caustic...ALWAYS caustic to water, I have seen people have a major eruption if you add the water to the caustic....be careful

Regards

10-06-2003 Over year old.

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Gasser Model RC Helicopters > How do you remove carbon build up in muffler?

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