All-Terrain Lawn Tractor Forum
Would you like to react to this message? Create an account in a few clicks or log in to continue.

All-Terrain Lawn Tractor Forum

Like riding lawn tractors through mud, woods, rocks, and snow? Then this is the place for you! Share your ideas, Post your projects and more!
 
PortalHomeSite RulesEventsFAQSearchRegisterLog inBuild-Off

 

 b&s surging at idle

Go down 
+4
CraftsmanQuad19
mr.modified
Doug
Kleatus
8 posters
AuthorMessage
Kleatus
Member
Kleatus
Member


Age : 22
Join date : 2016-11-07
Points : 2969
Posts : 54
Location : Memphis tn

b&s surging at idle  Empty
PostSubject: b&s surging at idle    b&s surging at idle  Icon_minitimeNovember 17th 2016, 8:46 pm

so i have a 16.5hp opposed twin with the nikki carb and it surges at an idle but runs better at full throttle i have cleaned the carb i know 3 times and i just took it off four the fourth time i have checked all the jets and they are clean and it doesnt have an adjustment screw . taryl fixes all said in one of his videos to drill out the jet one size bigger but which one and where is it located in the carb
Back to top Go down
http://Kolbyrector@icloud.com
Doug
Site Owner
Doug
Site Owner

2500+ Posts
2500+ Posts!
2014 Build-Off Entrant
2014 Build-Off Entrant
2017 Build-Off Entrant
2017 Build-Off Entrant

Age : 29
Join date : 2012-12-24
Points : 7731
Posts : 3044
Location : Lebanon County, PA

b&s surging at idle  Empty
PostSubject: Re: b&s surging at idle    b&s surging at idle  Icon_minitimeNovember 17th 2016, 8:48 pm

Dont all carbs have adjustments?

Pics of carb?


Head Forum Administrator ** Chat Moderator ** Facebook Page Admin
ATLTF Facebook Page ** Chatbox ** How To Upload Pictures

_X_ FORUM ANNOUNCEMENTS _X_


Have a question? Ask me! Type in "@Doug" in your post!

Your ATLTF Staff:
Administrators: @Doug, @MightyRaze, @"Doc Sprocket", @Stretch44875
Moderators: @TheRainbowBoxer, @AllisKidD21, @Brianator, @RichieRichOverdrive




Back to top Go down
Kleatus
Member
Kleatus
Member


Age : 22
Join date : 2016-11-07
Points : 2969
Posts : 54
Location : Memphis tn

b&s surging at idle  Empty
PostSubject: b&s   b&s surging at idle  Icon_minitimeNovember 17th 2016, 9:11 pm

all it has is a idle adjustment to make it idle low or high they took out all the adjustments for emmissions so now all you can do is redrill the jets but i dont know which one
Back to top Go down
http://Kolbyrector@icloud.com
Doug
Site Owner
Doug
Site Owner

2500+ Posts
2500+ Posts!
2014 Build-Off Entrant
2014 Build-Off Entrant
2017 Build-Off Entrant
2017 Build-Off Entrant

Age : 29
Join date : 2012-12-24
Points : 7731
Posts : 3044
Location : Lebanon County, PA

b&s surging at idle  Empty
PostSubject: Re: b&s surging at idle    b&s surging at idle  Icon_minitimeNovember 17th 2016, 9:26 pm

I would assume the main.


Head Forum Administrator ** Chat Moderator ** Facebook Page Admin
ATLTF Facebook Page ** Chatbox ** How To Upload Pictures

_X_ FORUM ANNOUNCEMENTS _X_


Have a question? Ask me! Type in "@Doug" in your post!

Your ATLTF Staff:
Administrators: @Doug, @MightyRaze, @"Doc Sprocket", @Stretch44875
Moderators: @TheRainbowBoxer, @AllisKidD21, @Brianator, @RichieRichOverdrive




Back to top Go down
mr.modified
Veteran Member
mr.modified
Veteran Member

2015 Build-Off Top 3 Winner
2015 Build-Off Top 3 Winner
2016 Build-Off Top 3 Winner
2016 Build-Off Top 3 Winner
2018 Build-Off Finalist
2018 Build-Off Finalist
2022 Build-Off Entrant
2022 Build-Off Entrant
2500+ Posts
2500+ Posts!
1st Place Build-Off 2014
1st Place Build-Off Winner 2014
2023 Build-Off Entrant
2023 Build-Off Entrant

Age : 34
Join date : 2013-11-02
Points : 7116
Posts : 2907
Location : New Jersey USA

b&s surging at idle  Empty
PostSubject: Re: b&s surging at idle    b&s surging at idle  Icon_minitimeNovember 17th 2016, 9:27 pm

I would be careful about drilling jets out. There are special numbered drill bits in very close sizes for that type of thing. Not just like the normal drill bits from your regular box o bits. You may have to knock a plug out to get to an idle jet, maybe in the side? Or like fackler says the main jet threaded in the bottom. Not sure why it would surge though after you cleaned it out. Unless something is missing like a small plug or you missed a tiny hole somewhere that is blocked off.
Back to top Go down
CraftsmanQuad19
Veteran Member
CraftsmanQuad19
Veteran Member

2500+ Posts
2500+ Posts!
2018 Build-Off Entrant
2018 Build-Off Entrant
2019 Build-Off Finalist
2019 Build-Off Finalist

Age : 24
Join date : 2016-04-12
Points : 5920
Posts : 2632
Location : Indiana

b&s surging at idle  Empty
PostSubject: Re: b&s surging at idle    b&s surging at idle  Icon_minitimeNovember 17th 2016, 9:30 pm

probably easier to just buy the better 3 screw carb that is adjustable
Back to top Go down
Kleatus
Member
Kleatus
Member


Age : 22
Join date : 2016-11-07
Points : 2969
Posts : 54
Location : Memphis tn

b&s surging at idle  Empty
PostSubject: b&s   b&s surging at idle  Icon_minitimeNovember 17th 2016, 9:34 pm

i knocked the welch plug out and there was no trash in it i have cleaned both jets i know what bits to use they come in one of those finger drills and if their is not one in there i have people that can get them for me because i have hogged out a kohler k series carb to like a 1.125
Back to top Go down
http://Kolbyrector@icloud.com
Kleatus
Member
Kleatus
Member


Age : 22
Join date : 2016-11-07
Points : 2969
Posts : 54
Location : Memphis tn

b&s surging at idle  Empty
PostSubject: b&s   b&s surging at idle  Icon_minitimeNovember 17th 2016, 9:38 pm

i mean it runs alright at full throttle but it just bothered me that at a idle it would act like it was gonna die then it come back to life i mean its fine i cut grass with it for a full year
Back to top Go down
http://Kolbyrector@icloud.com
MightyRaze
Administrator
MightyRaze
Administrator

2017 Build-Off Finalist
2017 Build-Off Finalist
2018 Build-Off Top 3 Winner
2018 Build-Off Top 3 Winner
2019 Build-Off Top 3 Winner
2019 Build-Off Top 3 Winner
2021 Winner of Winners
2021 Winner of Winners
1st Place Build-Off 2022
1st Place Build-Off Winner 2022
10,000 POSTS!
10,000 POSTS!
2024 Build-Off Entrant
2024 Build-Off Entrant

Age : 49
Join date : 2016-09-06
Points : 15555
Posts : 10930
Location : Oklahoma

b&s surging at idle  Empty
PostSubject: Re: b&s surging at idle    b&s surging at idle  Icon_minitimeNovember 17th 2016, 11:27 pm

I have the same carb, and when it starts to surge under half throttle it is almost ALWAYS the idle jet.  I attached a pictured from another site, it is the one circled in green.

b&s surging at idle  _jet_main

taken from: http://outdoorpowerinfo.com/repairs/briggs_opposed_twin_carb2.asp

Unscrew it and check the bottom tip that it is fully open.  I would not jet this carb, I know Taryl talks about it on other carbs, but he also says this carb is junk and get an old 3 screw fuel pump version to replace it.  :-)  That is my plan when they come back down in price.


b&s surging at idle  Sig115PROJECTS:
     Marshal ........................93 Craftsman GT6000      
     Red Bandit ...................72 Wheel Horse Raider 12
     Dirty Rat........................77 Sears Suburban
     Bowser...........................01 Murray Widebody LT
     The Green Machine ....1990 Craftsman II GT18     
Other projects
Have a question? Ask me! Type in "@MightyRaze" in your post!
b&s surging at idle  Sig214b&s surging at idle  Sig314
Back to top Go down
MatthewD
Veteran Member
MatthewD
Veteran Member

1000+ Posts
1000+ Posts!
2015 Build-Off Entrant
2015 Build-Off Entrant
2016 Build-Off Entrant
2016 Build-Off Entrant

Age : 23
Join date : 2014-11-16
Points : 5705
Posts : 1993
Location : Northern Ireland

b&s surging at idle  Empty
PostSubject: Re: b&s surging at idle    b&s surging at idle  Icon_minitimeNovember 18th 2016, 5:05 pm

I know the other guys are probably right, but I've had this problem with a 8hp single and it turned out to be the governor was in the wrong position (on the little rod that comes out of the crankcase). It ran fine at full throttle but at idle it would surge up and down and it was really annoying. I cleaned the carb lots of times but it turned out to be the governor. Might be helpful to check that.

JB_4x4 likes this post

Back to top Go down
The author of this message was banned from the forum - See the message
Kleatus
Member
Kleatus
Member


Age : 22
Join date : 2016-11-07
Points : 2969
Posts : 54
Location : Memphis tn

b&s surging at idle  Empty
PostSubject: B&s   b&s surging at idle  Icon_minitimeNovember 23rd 2016, 3:40 pm

I have put it in my ultra sonic cleaner with simple green and it looks like new I I'm going to try it tomorrow if that doesn't fix it I will check the governor if that is ok I'm going to try find a three screw carb if not I might be the only one that has a mikuni carb on my grass cutter
Back to top Go down
http://Kolbyrector@icloud.com
prancstaman
Veteran Member
prancstaman
Veteran Member

1000+ Posts
1000+ Posts!

Join date : 2015-02-02
Points : 5048
Posts : 1412
Location : Cleveland,Ohio

b&s surging at idle  Empty
PostSubject: Re: b&s surging at idle    b&s surging at idle  Icon_minitimeNovember 24th 2016, 10:12 pm

Maybe try narrowing it down by taking the governor linkage off the carb.
Back to top Go down
MightyRaze
Administrator
MightyRaze
Administrator

2017 Build-Off Finalist
2017 Build-Off Finalist
2018 Build-Off Top 3 Winner
2018 Build-Off Top 3 Winner
2019 Build-Off Top 3 Winner
2019 Build-Off Top 3 Winner
2021 Winner of Winners
2021 Winner of Winners
1st Place Build-Off 2022
1st Place Build-Off Winner 2022
10,000 POSTS!
10,000 POSTS!
2024 Build-Off Entrant
2024 Build-Off Entrant

Age : 49
Join date : 2016-09-06
Points : 15555
Posts : 10930
Location : Oklahoma

b&s surging at idle  Empty
PostSubject: Re: b&s surging at idle    b&s surging at idle  Icon_minitimeNovember 24th 2016, 11:30 pm

One other thing but you should see it, on my Sasquatch project, my intake manifold was cracked in half causing surging.


b&s surging at idle  Sig115PROJECTS:
     Marshal ........................93 Craftsman GT6000      
     Red Bandit ...................72 Wheel Horse Raider 12
     Dirty Rat........................77 Sears Suburban
     Bowser...........................01 Murray Widebody LT
     The Green Machine ....1990 Craftsman II GT18     
Other projects
Have a question? Ask me! Type in "@MightyRaze" in your post!
b&s surging at idle  Sig214b&s surging at idle  Sig314
Back to top Go down
Kleatus
Member
Kleatus
Member


Age : 22
Join date : 2016-11-07
Points : 2969
Posts : 54
Location : Memphis tn

b&s surging at idle  Empty
PostSubject: Bands   b&s surging at idle  Icon_minitimeNovember 30th 2016, 4:43 pm

The vat fixed it it runs like a CUMMINS now thanks for the help
Back to top Go down
http://Kolbyrector@icloud.com
MightyRaze
Administrator
MightyRaze
Administrator

2017 Build-Off Finalist
2017 Build-Off Finalist
2018 Build-Off Top 3 Winner
2018 Build-Off Top 3 Winner
2019 Build-Off Top 3 Winner
2019 Build-Off Top 3 Winner
2021 Winner of Winners
2021 Winner of Winners
1st Place Build-Off 2022
1st Place Build-Off Winner 2022
10,000 POSTS!
10,000 POSTS!
2024 Build-Off Entrant
2024 Build-Off Entrant

Age : 49
Join date : 2016-09-06
Points : 15555
Posts : 10930
Location : Oklahoma

b&s surging at idle  Empty
PostSubject: Re: b&s surging at idle    b&s surging at idle  Icon_minitimeNovember 30th 2016, 4:45 pm

Good deal, goop somewhere in there you got cleaned out! b&s surging at idle  102878487


b&s surging at idle  Sig115PROJECTS:
     Marshal ........................93 Craftsman GT6000      
     Red Bandit ...................72 Wheel Horse Raider 12
     Dirty Rat........................77 Sears Suburban
     Bowser...........................01 Murray Widebody LT
     The Green Machine ....1990 Craftsman II GT18     
Other projects
Have a question? Ask me! Type in "@MightyRaze" in your post!
b&s surging at idle  Sig214b&s surging at idle  Sig314
Back to top Go down
Sponsored content





b&s surging at idle  Empty
PostSubject: Re: b&s surging at idle    b&s surging at idle  Icon_minitime

Back to top Go down
 
b&s surging at idle
Back to top 
Page 1 of 1
 Similar topics
-
» Briggs 10 hp surging
» briggs surging and sparking

Permissions in this forum:You cannot reply to topics in this forum
All-Terrain Lawn Tractor Forum :: Technical Forum :: Engine Tech :: Briggs and Stratton-
Jump to: