I have just purchased an old 120 0s engine and want to clean the burnt fuel that is all over it could anyone help thanks

some people disassemble them remove the carburetor,and soak the rest in a crock pot set on low in antifreeze about 8 hours or so,i have never done this but have been told it works perfectly.know you will never be able to use the crock pot for cooking food again as it ruins it.they say use ethylene glycol,the green stuff.hope this helps.

You could give "Demon Clean" a try http://www.bj-model-engines.com/Demo..._11-11-05.html

Crock Pot/Antifreeze overnight on low. Crud rinses off like magic. Metal looks like new. Just be sure to remove all rubber and plastic parts.

Here is a review of a product that is supposed to be great:

"Pictured is my 20+ year old Fox .35 control line engine. Note that is now clean and shinny thanks to the Dawn Power Dissolver. It was covered with the dark brown varnish crap that comes as a by-product from burning caster oil glow fuel. That varnish is something that will not come off easily. Well, after reading about this stuff in Model Airplane News™ in a tip by Randy Byers from Bloomington, Indiana, I went to Kroger and bought a bottle. I had my doubts, but all I did was spray it on, wait a little bit, and then started brushing it with an old tooth brush. That brown gook came rolling off. After I cleaned the engine, I rinsed it in hot water; compressed air dried it, and then applied my usual after-run oil. (Marvels Mystery Oil) So if you have a varnished up engine and muffler, give it a try. It works!"

Regardless of which method that you use, be sure to thoroughly clean and rinse the inner workings when done.

The Varnish and carbon come off in chunks that will foul the engine and cause lots of damage. [:@]

If you have the ability, dissassemble and clean, if you cannot do that pull the glow plug etc and rinse thoroughly. [8D]

Here is my crockpot thread for my .40. It worked great and looks like brand new.

http://www.rcuniverse.com/forum/m_46...tm.htm#4699477

skeeter

I use the crock pot method. Works great. On really really bad gunk, you might have to use a tooth brush or a scribe to pick if off. The engine will look like new. If there is a carbon on the valves and cylinder head, I'll use a wire wheel or wire crown brush to clean it off. You just have to be real careful with the valve stem keepers. They'll spring clear across the room and be lost for eternity. Some guys do that job in a plastic back to keep from losing them.
Edwin