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aluminum carb, removing rust ?

Geo-TH,In

Geo-TH,In

Well-known Member
A neighbor wants me to fix a lawnmower they left out in the rain. Carb was full of water. The carb metal bowl was solid rust and rust is blocking the small idle jet that I can't get access too. Tried air pressure and carb cleaner in a spray can.

The main part of the carb is aluminum. So what can I use to remove the rust from the idle jet inside the aluminum carb body?

Carb is off a 6 hp briggs. There are no adjustment screws on this carb.

I wish people who want me to fix things don't leave them outside in the rain.
 
Soak it in some penetrating oil for a while and then try running some bare solid copper wire through as far as you can, then try using compressed air. This is only a thought as I've never done this, but seems like it should work....in theory, anyhow.
 
I agree with the new carb. Probably get one off eBay for less money and headache than trying to clean it. You will most likely never get all the rust, then they will bring it back every time it quits running.
 
The works toilet bowl cleaner. Give it a soak, but not very long ! If all else fails leave it in too long and then you WILL need a new carb. for sure.

Some times you just have to say NO to those that want things done.
 
Because of government regulations carburetor cleaner in a spray can sold on shelves are only a little better than hand cleaner. Get a can with a basket from NAPA of carburetor cleaner. Let it set over night or longer. Then wear plastic gloves to save your skin from burning. Rinse well with water and they use your spray can to blow it clean. I boil any carburetor I am going to take apart in soap water but it sound like you are past that stage.
 

Acid such as vinegar or bowl cleaner. It will attack both the aluminum and the rust, but the rust will dissolve faster. Give it no more than fifteen minutes.
 

Automobile and truck carburetors were all made of aluminum for many, many years. Holleys on the Fords, Carters on the MoPars, and Rochesters on the GMs. We cleaned all of them in that good old carb cleaner that would take your skin off.
 
Mike, you are right, JUST SAY NO!
I don't understand why people leave things outside. Rain does a lot of damage.
George
 
pitch and get carb replacement cheaper in time and won't get bitc!!! at when get back not run correct. this shop won't waste time on clean those little ones cheaper just throw new on.
 
If the carb is full of water, I would check the combustion chamber and crankcase oil for water and corrosion. If those are bad fixing the carb won't matter.
 
I agree. Don't think they want to spend a dime on it. Push mowers aren't worth a dime to me.

Good chance it won't get fixed.
 
save yourself a lot of grief, look on amazon for a new carb, I just got one for 7 bucks, put it on , 3 pulls of the rope and it was running
 
I'm in the just get a new carb camp. Last spring my big string trimmer would start but not run right. I spent a day cleaning/messing with the carb then had to buy a couple gaskets. finally gave up and ordered a new carb off eBay for something like $10.00. Had it in a couple days, bolted it on and it ran great. I will never try to clean/repair a small engine carb again.
 
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