I need to rebuild the carburetor on a Stihl Model 025 chainsaw. An exploded view diagram would help.

That particular saw came with one of four different carburetors. Luckily they were all Zamas and they all appear to use the same rebuild kit, the RB-69. The cross reference doesn't cover the S108J version but it should the same as the original S108.

Carburetor listed in IPL are CIQ-S32, CIQ-S61, C1Q-S61D and the C1Q-108J. To verify which carburetor you have the model number are imprinted on the carburetor body.

nothing it's the same . stihl never used the ms back when the 025's were produced. later they changed to calling all their saws ms but the 025 is equivalent to a ms 250 I believe

Chain saw and other small engines are particularly susceptible to problems caused by stale fuel containing ethanol. Always use ethanol free fuel or add a fuel stabilizer if the saw will sit for more than a month. If you spray engine starter (ether) in the carburetor and it runs briefly, the carburetor is probably gummed up. You can possibly rebuild the carburetor, but you need the precise model of rebuild kit matched to the number on the carburetor. It's often more cost efficient to replace the carburetor, an easy job. Stihl and other manufacturers have so much trouble with this issue, that they have dropped the price of replacement carburetors to about $50.

Another way to avoid this problem in the future is to drain the gas tank and run the saw until the carburetor is completely empty before storing it.

A less likely problem is a clogged muffler if you have been running a fuel mixture with too much oil or an inferior brand of oil.

http://www.hlsproparts.com/stihl-replacement-parts-s/79.htm?Click=28651&gclid=CNXP0_WbmcQCFQsxaQod1XgAug

http://www.doityourself.com/forum/outdoor-gasoline-electric-powered-equipment-small-engines/279941-stihl-chainsaw.html#b

1. Stihl Chainsaw - DoItYourself.com Community Forums

   www.doityourself.com/forum/outdoor.../279941-stihl-chainsaw.html
   Oct 4, 2006 - I am in the process of rebuilding my Stihl chainsaw carb. I am having troubles identifying this Stihl model. The only sticker on the saw is 311Y.

Hi sorry I dont understand thequestion could you be a little more clear with the question please. I have this model.
Steve

Stihl doesn't offer an exploded view of their units and the parts list we have can't be copied or printed

If you need further help, I’m available over the phone at https://www.6ya.com/expert/kelly_69a0cf1b13789df1

For what model? There are quite a few.

http://www.mediafire.com/view/c1laqmtp0impacb

Stihl IPLs (exploded parts list) are propriatary, You can request one here: The IPL (exploded parts list) for your saw is the only detail for fuel line routing and it is sketchy at best; components are listed but on multiple illustrations.
http://www.stihlusa.com/contact.php

Typical Fuel System (Primer Bulb and fuel lines may not apply)
http://www.img4free.com/images/Lou98321/fuelsystem.jpg
Fuel Line Replacement by SmallEng.com
http://www.youtube.com/watch?v=JrXpU70Hmi0

• The hose in the tank with the filter on the free end connects directly to the carburetor input connection.
• If the saw is equipped with a primer bulb, an output line from the carburetor connects to the suction side of the primer (once the bulb is collapsed it draws fuel from the tank through the carburetor to refill as it inflates).
• The pressure side of the primer returns displaced fuel to the tank as it is depressed.

Take lots of notes and a few digital photographs to help with reassembly. HTH
Lou