The illusive fuel tank vent

[samaritan]

I own a Stihl ms251c and Im rebuilding it, I was looking for the fuel tank vent, and could not find it. I searched this site and you-tube with no luck. I finally did find it. Its under a cover on the left side of the saw handle near the tank, the screw also holds the shock spring in place.View attachment 1042835

 

[HarleyT]

Here is a better pic. Why are you changing it?

 

[samaritan]

Well, im rebuilding it, so im changin anything that may have been part of the problem

 

[samaritan]

Here is a better pic. Why are you changing it?View attachment 1042845

 

[samaritan]

The old one came out with a bit of a struggle, the new ones not fitting tight, is there a way it needs to be done?

 

[AoxoMoxoA]

Well, im rebuilding it, so im changin anything that may have been part of the problem

Which was?

 

[samaritan]

Which was?

Trouble starting, stalling. I got the vent back in, i lubed it and used channel locks and squeezed it in

 

[PV Hiker]

Yea i hear you, I grab a Stihl and its a Easter egg hunt as to where did they hide it on this saw? Some are in hard to get location quickly

 

[HarleyT]

I can't say that I have ever had to replace one of that style vent.

 

[PV Hiker]

Me neither. Just like to find them and clean the top if packed with crap. They always seem to work when testing the system.

 

[thenne1713]

Trouble starting, stalling. I got the vent back in, i lubed it and used channel locks and squeezed it in

I had a poulan, would prime-start-run 15-sec, die, after pulling hair out, (and changing numerous things), cut 1/8" off fuel line (1"+length) between carb/primer, which straightened line removing slight bend/ crimp, and allowed FREE FLOW of fuel, and it cured issue.

 

[stihltech]

Smart to replace the vent. Has been an issue. ALWAYS vacuum test the tank to verify it opens, It will be quite slow, but not hold vacuum.