Idle Speed Screw Problem

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tay
Posts: 16
Joined: Fri Aug 06, 2021 11:50 am
First Name: tay
Last Name: v
City/Town: Calgary

Idle Speed Screw Problem

Post by tay »

Have a question about the Briggs L206 idle ̶s̶p̶e̶e̶d̶ mixture screw. I had one fall out while driving already and the replacement doesn't seem to fit right.

The Problem:
  • Even when fully screwed in, the new replacement screw still sticks out a lot. I tried leaving the spring out but have the same problem. See picture for example of it fully seated.
What I'd expect:
  • I'd expect the screw to sit pretty close to flush when screwed all the way in.
Potential problems:
  • It looks like there might be a broken spring inside the barrel that's preventing me from turning the screw all the way in. (A bit hard to see but I attached a couple pics)
  • If it is a broken spring inside, it's in really solid and I can't remove it.
Just wondering if anyone has ideas and whether those internal threads are supposed to be there?
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Last edited by tay on Mon May 23, 2022 2:36 pm, edited 1 time in total.

Mark
Posts: 640
Joined: Wed Jul 09, 2008 1:57 pm
First Name: Mark
Last Name: Hillier
City/Town: Calgary

Re: Idle Speed Screw Problem

Post by Mark »

That is the air mix screw; idle is the larger one.

Have a look at this:

https://www.google.com/url?sa=t&rct=j&q ... Fb5patj7oU
Mark Hillier #44

tay
Posts: 16
Joined: Fri Aug 06, 2021 11:50 am
First Name: tay
Last Name: v
City/Town: Calgary

Re: Idle Speed Screw Problem

Post by tay »

Mark wrote: Sun May 22, 2022 10:07 pm That is the air mix screw; idle is the larger one.

Have a look at this:

https://www.google.com/url?sa=t&rct=j&q ... Fb5patj7oU
Oops I made a mistake when writing it up. I think this should be the right part based on the manual you linked.
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phil
Posts: 388
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Last Name: haggerty
City/Town: high river

Re: Idle Speed Screw Problem

Post by phil »

That is the old spring inside. It doesn't look broken. If a pick won't get it out, there are two options - use an ultrasonic cleaner to clean the carb, and it will likely come out, or just use the new screw with the old spring, and leave the new spring out.

Phil

tay
Posts: 16
Joined: Fri Aug 06, 2021 11:50 am
First Name: tay
Last Name: v
City/Town: Calgary

Re: Idle Speed Screw Problem

Post by tay »

Managed to dig the old spring out. Thanks for the help.

Jen and Don
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Joined: Sun May 06, 2018 11:30 am
First Name: Jennifer
Last Name: Cheung
City/Town: Sundre

Re: Idle Speed Screw Problem

Post by Jen and Don »

As the old saying goes, "Phil's not just a pretty face!" :D

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