Stihl 038

[MacG1986]

Hi all. So I asked for some help here a few weeks ago and you guys were right on. My saw was not starting cause the choke linkage was not functioning properly. The saw is running now but not very well. It ran well before the fuel tank replacement so I'm assuming the carb is okay. But it's cutting out and lots of smoke like it's rich. I noticed that the person who did the work has a piece of flexible conduit over the spark plug wire. That was not there before. Could it be week spark so that's why? Or carburetor issue? Any insight would be appreciated.

 

[Deleted member 150358]

But it's cutting out and lots of smoke like it's rich.

Sounds like the choke flaps still shutting.

 

[MacG1986]

Hum, hadn't considered that, I'll have a look, but it appears to functioning properly at this point.

 

[Ozhoo]

Hum, hadn't considered that, I'll have a look, but it appears to functioning properly at this point.

What he's saying is that the choke flap gets partially sucked closed at high rpm. There's a tiny spring holding the choke flap open and that spring gets weak over time causing the symptoms you describe.

 

[MacG1986]

Ozhoo, okay thanks for details. That could be it. I'll look for a little spring.

 

[MacG1986]

If I pulled the air filter off and ran it that way that would tell me if it was the spring or not right?

 

[Ozhoo]

If I pulled the air filter off and ran it that way that would tell me if it was the spring or not right?

Yep, you got it.

 

[MacG1986]

Thanks very much, I'll give it a try.

 

[Mad Professor]

When you take the filter apart, look for the stihl part numbers.

If the filter is not OEM, sometimes they give problems