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 How to clean inside of old chainsaw fuel tank?
Kalahnikid  [Team Member]
6/4/2010 3:04:54 PM
I found an old Stihl chainsaw that was abandoned about 20 years ago, it still had probably a quarter tank of fuel in it.

The inside of the tank has gooey sloppy red varnished crap all over the sides, and on the bottom the old fuel intake line has melted to the bottom and broken off.

I cant get a pic of the inside of the tank, but heres a pic of the whole project.



Thanks for any help I can get.
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ACEB36TC  [Team Member]
6/4/2010 4:32:39 PM
The simple way is to soak the entire tank overnight in carb cleaner. You will more than likely have to buy a NEW carb. Stihl is really good about having parts for older saws.
Kalahnikid  [Team Member]
6/4/2010 4:56:47 PM
Originally Posted By ACEB36TC:
The simple way is to soak the entire tank overnight in carb cleaner. You will more than likely have to buy a NEW carb. Stihl is really good about having parts for older saws.


Ok, thanks. I called a mechanic friend and he recommended B-12 Chemtool.

Ive torn the carb down some and its kinda gummed up but it doesnt look like its in all that bad of shape really, even the rubber gaskets and diaphragms are still pretty soft and plyable. Hopefully I can fix it.
ACEB36TC  [Team Member]
6/4/2010 5:18:02 PM
You can try and reuse the old carb BUT the fuel paths through the cast aluminum carb or SO small that I don`t think you`ll ever get them clean enough to operate properly. If you can find the model # your local Stihl dealer CAN get you any parts you may need. Keep in mind that for well under $200 you can get a new entry level 14 inch saw.
Kalahnikid  [Team Member]
6/4/2010 5:21:51 PM
Originally Posted By ACEB36TC:
You can try and reuse the old carb BUT the fuel paths through the cast aluminum carb or SO small that I don`t think you`ll ever get them clean enough to operate properly. If you can find the model # your local Stihl dealer CAN get you any parts you may need. Keep in mind that for well under $200 you can get a new entry level 14 inch saw.


Yea, I ve been trying to pick things out with some wire, but yeah I dont want to dump a bunch of money into something that isnt worth it; which is why Im trying to do everything myself because if I took it somewhere Id spend more than I could buy a newer one with.
chadwimc  [Team Member]
6/4/2010 5:28:32 PM
I've used acetone with good results.
Kalahnikid  [Team Member]
6/4/2010 5:55:13 PM
Originally Posted By chadwimc:
I've used acetone with good results.


Hey thats a good idea...and I have some around here some where. Thanks.
Oliver  [Member]
6/5/2010 7:26:49 AM
1 can of brasso

1 pack of 2500 BB's

1 case tumbler.

modify the tumbler with a flat board, fill tank with half can of brasso and 2500 bb's, strap tank to board turn tumbler on 20min per side.

you'll have to use another method for the top.

your tank will come out almost brand new, this method even works if you have baffles to the tank.
echosierra3  [Member]
6/5/2010 9:04:44 AM
Ultrasonic cleaner for the carb, let it run overnight
trwoprod  [Team Member]
6/6/2010 11:17:04 AM
Originally Posted By Kalahnikid:
Originally Posted By ACEB36TC:
The simple way is to soak the entire tank overnight in carb cleaner. You will more than likely have to buy a NEW carb. Stihl is really good about having parts for older saws.


Ok, thanks. I called a mechanic friend and he recommended B-12 Chemtool.

Ive torn the carb down some and its kinda gummed up but it doesnt look like its in all that bad of shape really, even the rubber gaskets and diaphragms are still pretty soft and plyable. Hopefully I can fix it.


B-12 is nice (but not as good as it used to be) but Kreen is even better.
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