Ms391 carb frustration

[im stihl Dave]

Good day
I have a ms391, I need to adjust the carb. These white bushings are in my way. Are they necessary? Can I take them out and leave them out?

 

[Patrick1903]

Good day
I have a ms391, I need to adjust the carb. These white bushings are in my way. Are they necessary? Can I take them out and leave them out?

Are you Stihl waiting for a response?

 

[Old2stroke]

If you are talking about the limiter caps on the H and L screws, the answer is YES, take them off and leave them off.

 

[HarleyT]

Here is a pic of one.

 

[stihltech]

The bigger question is WHY do you need to adjust the carb?