Were does the small vent tube out the top of the gas tank go on a stihl 029 farm boss. mine broke off flush with the nipple and is leaking gas badly.

The vent hose attaches to the white nipple coming out of the tank. This hose is about 2 inches long or so and contains two little grub scews to allow a small amount of air leakage. One can be fabricated or easily acquired from a Stihl dealer. (note, the other end doesn't attach to anything)

sthil ms 290 chain saw 9-10-12 - YouTube

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https://www.youtube.com/watch?v=-xJAcXZqeog
Sep 10, 2012 - Uploaded by skidoo849
sthil chain saw 9-10-12. ... my 2012 STIHL MS 290 FARM BOSS CHAIN SAW WITH A 16'IN BAR. - Duration: 34:11. MRJOHNDEERE3720.

How To Adjust Your STIHL Saw Chain - YouTube

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https://www.youtube.com/watch?v=dZq7ZDBx4iA
Dec 4, 2012 - Uploaded by STIHL USA
Learn the differences in adjusting a cold chain vs.a recently used chai. ... Also learn about the STIHL Quick Chain Adjustment feature found on certain STIHL chain saw models. ... Stihl MS290 Farmboss Discussion - Duration: 5:37. ... How to Replace the Bar & Chain Oil Pump Worm Gear on a Stihl MS 029 ...

[PDF]STIHL MS 290, 310, 390

www.stihlusa.com/WebContent/.../MS290_310_390_Manual.pdf

StihlInstruction Manual - improper use can cause serious or fatal injury. MS 290. Warning! .... engineering changes and improvements ... When using a chain saw for.

Chain Tensioner Adjuster for Stihl Chainsaw MS290 MS39

The first thing I'd suggest is to check the vent on the fuel tank. It should be either a molded plastic slip-on device that attaches to a stub on the top of the tank or it will be a small hose that does the same thing. Inserted in the end of the small hose, if so equipped, should be a tiny, tiny, tiny set screw which serves as a 'restrictor' to allow the tank to vent but not the gas. Either the tube has fallen off, cracked or the restrictor is missing.

A lot of Stihl have a tiny tiny tiny allen headed set screw just screwed into the open end of the vent. Some have a fancy deal with many descriptions. Try a set screw ran in flush with the opening of the vent tubing. Keep it clean and venting, because an unvented tank will not allow fuel to be drawn into the cylinder.

Not really, but if you've had the issue, maybe the vent tube is allowing gas to be dripped into the carbuetor compartment behind the filter. Sometimes, when held horizontally, they will leak a bit out and older saws sometimes have the vent line to deteriorate from the alcohol in todays fuels causing a few drops of gas to escape. I've worn out two 041 Farm Boss saws and never a problem other than normal maintenance.

http://www.mediafire.com/view/0lz34tddcj763js

It very well could be. Pull the muffler and inspect the piston and cylinder for any scoring.

It could be the fuel tank vent is missing.try looking up your model number at ereplacementparts.com.It will show a diagram of whats where and the part you might need.

I would guess that you have already checked this but many years ago I got ahold of a bar for my stihl .029 super farm boss that had a slight warp in it. It would work fine at most r.p.m.'s but when you ran it wide open it would toss the chain. It took me awhile to find this and on mine if you wern't watching very close you would never see it. I hope this helps you some, Good luck and thanks

The little nipple on the outside of the tank is for a tank vent...there should be a small tube on it with a small vent screw in it.