Results 1 to 10 of 10
  1. #1

    Join Date
    Jul 2019
    Posts
    14
    Location
    New Jersey
    Mower
    Craftsman

    What spring do I need?

    Craftsman Model: 247.37031

    Briggs and Stratton Model: 126M02-6863-F1

    The light, almost fully stretched spring in the pic is a spring from a pen. I lost the original spring last year which was much lighter. The mower makes a backfire sound sometimes when shutting off and I'm wondering if it's due to the wrong spring being on there.


    In the replacement parts list in the link below, the only springs are the choke return spring (which I believe is the heavier spring in the pic) and a spring detent (which looks like a small internal part).

    Any help would be appreciated.


    https://shop.briggsandstratton.com/p...F1/103320003/y
    Attached Images Attached Images

  2. #2

    Join Date
    Sep 2017
    Posts
    889
    Location
    Conroe
    Mower
    CCltx1040,ryobi push w/ BS6.25 Poulan w/ a 4.5 horse BS, poulan w/ 799983 short block.

    Re: What spring do I need?

    alrighty, you have an engine with an Auto Choke it, and you need this spring https://www.jackssmallengines.com/ja...tratton/690354
    part number 690354.
    and if you're interested here's how to the auto choke system works. https://youtu.be/YAqVcdZOZE4?t=113


    EDIT for future reference, i gave the wrong part number.
    Last edited by Scrubcadet10; 07-12-2019 at 09:16 PM.
    I know enough to be dangerous

  3. #3

    Join Date
    Jul 2019
    Posts
    14
    Location
    New Jersey
    Mower
    Craftsman

    Re: What spring do I need?

    Isn't that the heavy spring in the pic I took?

    Maybe 209A or 209B in the diagram on the below web page?:

    https://shop.briggsandstratton.com/p...F1/103320006/y

  4. #4

    Join Date
    Sep 2017
    Posts
    889
    Location
    Conroe
    Mower
    CCltx1040,ryobi push w/ BS6.25 Poulan w/ a 4.5 horse BS, poulan w/ 799983 short block.

    Re: What spring do I need?

    no, those are governor springs, you can bend the tab it is hooked to to raise/lower engine RPM's
    you need the choke return spring, found one a little cheaper on amazon https://www.amazon.com/Briggs-Stratt.../dp/B002WNY8TW
    I know enough to be dangerous

  5. #5

    Join Date
    Jul 2019
    Posts
    14
    Location
    New Jersey
    Mower
    Craftsman

    Re: What spring do I need?

    Can you please take another look at the pic I took? The spring I need replaced is the one the one that was in the place of the pen spring now on the mower (the one almost all the way stretched). The heavier spring in the pic I do not need and looks like the choke return spring you're recommending. The spring I lost was very light.

  6. #6

    Join Date
    Sep 2017
    Posts
    889
    Location
    Conroe
    Mower
    CCltx1040,ryobi push w/ BS6.25 Poulan w/ a 4.5 horse BS, poulan w/ 799983 short block.

    Re: What spring do I need?

    Here ya go! i jostled my memory of when i worked on an auto choke last year.
    https://www.jackssmallengines.com/ja...tratton/790849

    it was in a different diagram. I had looked at the wrong diagram number. the diagram i looked at showed different type carburetors and the one i saw was for the non autochoke engine
    sorry for any confusion i caused.
    I know enough to be dangerous

  7. #7

    Join Date
    Jul 2019
    Posts
    14
    Location
    New Jersey
    Mower
    Craftsman

    Re: What spring do I need?

    Yes, I think that's it! Thank you for the help, much appreciated!

  8. #8

    Join Date
    Sep 2017
    Posts
    889
    Location
    Conroe
    Mower
    CCltx1040,ryobi push w/ BS6.25 Poulan w/ a 4.5 horse BS, poulan w/ 799983 short block.

    Re: What spring do I need?

    you are very welcome!
    for future reference or any other problems CHOKE SPRING 2.jpg

    the tab circled in yellow, you can bend it outwards with some pliers to increase engine speed.
    I know enough to be dangerous

  9. #9

    Join Date
    Mar 2016
    Posts
    125
    Location
    Florida
    Mower
    lawnboy,honda,stihl

    Re: What spring do I need?

    That is same engine that do not want to start --the other post.I see U got lot good info,and still no start.From pic,s springs are all mess-up.What is compression on that engine?Dan

  10. #10

    Join Date
    Mar 2016
    Posts
    125
    Location
    Florida
    Mower
    lawnboy,honda,stihl

    Re: What spring do I need?

    Spring for air vane auto-choke is 790849.

Similar Threads

  1. Our spring so far....
    By northcreeek262 in forum Jacobsen Forum
    Replies: 4
    Last Post: 05-07-2019, 12:42 AM
  2. Replies: 7
    Last Post: 10-02-2018, 01:48 AM
  3. Where does spring go?
    By vlhan57 in forum MTD Forum
    Replies: 7
    Last Post: 04-21-2017, 06:02 PM
  4. Repairs Where does the spring go
    By 9501 in forum Cub Cadet Forum
    Replies: 2
    Last Post: 07-14-2014, 10:21 PM
  5. Must be spring here
    By JDgreen in forum Lawn Care & Landscaping
    Replies: 8
    Last Post: 05-05-2011, 10:48 AM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •