Carb cleaning

79 Deere · Post by **79 Deere** » Sun Jan 27, 2008 5:17 pm

Been trying to get 2 carbs cleaned for sometime now. I have soaked them many times in carb cleaner, Sprayed and blown the heck out of them with no luck. My only problem is getting the air passage way from rear of carb to the pilot jet clean.It seems it is open until it gets to the bend near pilot jet. I was thinking of putting them in a pot of boiling water then try to blow out passage way(only when the wife goes out of course). What do you think, will it help or will it hurt the casting or is there an easier way to do this.

jerryswiss · Post by **jerryswiss** » Tue Jan 29, 2008 6:48 pm

By the lack of response, I guess that means noboby knows. I don't know, I have never tried it. I do think the idea of heat is a good idea.

What are you soaking in in now? Are you doing it in the garage or the house? I know if you keep the soaking liquid warm it helps.

79 Deere · Post by **79 Deere** » Tue Jan 29, 2008 9:47 pm

I am using gunk carb cleaner in a 1 or so gallon can , 2+2 in a spray can then using compressed air.I have never had a carbs this clogged in the hardest place to get at. I just came in from the shed with no luck tonight. I think the air passage is clogged where the little brass fitting is pressed in at the pilot jet.These things have been sitting for about 18 years or so but this is getting very frustrating. Never thought that this would be the hardest thing to do considering I rebuilt the motor and replaced everything else with no problems.

jhecht · Post by **jhecht** » Tue Jan 29, 2008 10:05 pm

I have the same problem with a carb on one of my 440s, im still trying to figure out how to clean it as well... I tried the gunk and the air compressor trick with no success... I thought about boiling it as well, I know my uncle who owns a restoration shop said he's done it before but I still have my doubts. I should also mention that i have the sleds inside a heated shop so its not like the cleaners are freezing

79 Deere · Post by **79 Deere** » Tue Jan 29, 2008 10:42 pm

The only reason I am thinking about boiling them in water is I used to work at a transmission shop and we had a big machine we would put all the tranny parts in and it would steam them and they would come out like brand new.The only draw back is if you boil the carb the crap in the the passage way might even get harder.I still have a trailfire carb in the shed I use as a paper weight cause It had the same problem, I had to get another carb after that and I might have to get 2 more now.I now have them on the workbench with 2+2 sitting in the holes, maybe over night the carb ferry will let them drain out the other side and I can finally hear this thing run...

Danzig · Post by **Danzig** » Tue Jan 29, 2008 10:47 pm

phosphoric acid, I dont know where to buy this though.

79 Deere · Post by **79 Deere** » Tue Jan 29, 2008 10:49 pm

maybe ill get it from the neighborhood dealer...LOL I will try that...thanks

Danzig · Post by **Danzig** » Tue Jan 29, 2008 10:51 pm

Caution when using this stuff. I used it before and did a dilution of 1 gallon acid to 2 gallons water. It will bite!

Danzig · Post by **Danzig** » Tue Jan 29, 2008 10:53 pm

It made this carb look like new and this carb is in use today.

79 Deere · Post by **79 Deere** » Tue Jan 29, 2008 10:54 pm

Thats not the stuff they use to clean beer taps, I have some , but I just did a search it comes in fertilizer

Danzig · Post by **Danzig** » Tue Jan 29, 2008 10:56 pm

At work we have a machine called a Thermal Deburr. This machine blasts cast iron castings using natural gas and oxygen and a spark. After that operation the parts or castings are rusty and we use this in a wash tank to remove the rust. I have also used this stuff in the gas tank of my X8 and it came out looking brand new.

Danzig · Post by **Danzig** » Tue Jan 29, 2008 10:57 pm

The product comes from a company called Quaker

79 Deere · Post by **79 Deere** » Tue Jan 29, 2008 11:01 pm

do you think that would eat the crude out of the passage way.

Danzig · Post by **Danzig** » Tue Jan 29, 2008 11:02 pm

http://www.quakerchem.com/products/products_main.html

Danzig · Post by **Danzig** » Tue Jan 29, 2008 11:04 pm

Yeah, it will eat up basically anything in due time. Even the carb, therefore its best to dilute it and keep an eye on it. I soaked this carb for about 3 hours and it came out like new.