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

 

 Briggs & Stratton 18 Twin II will nly run on full choke

Go down 
5 posters
AuthorMessage
Ford Boi
Member
Ford Boi
Member


Age : 39
Join date : 2010-08-22
Points : 5230
Posts : 242
Location : Yarmouth, Nova Scotia, Canada

Briggs & Stratton 18 Twin II will nly run on full choke Empty
PostSubject: Briggs & Stratton 18 Twin II will nly run on full choke   Briggs & Stratton 18 Twin II will nly run on full choke Icon_minitimeOctober 27th 2011, 8:56 pm

My buddy got this 18 Twin Briggs and we can't seem to get it running properly I was hoping someone might have an idea. I'm trying to think of all we've tried. Ok, we put a new fuel pump kit, flushed the tank, new filter, cleaned the carb, new plugs, the motor runs very smooth at full throttle as long as it is choked. When the coke is let off it will stull run fine, but when you let it idle and try to throttle up it dies. Seems to me like it is sucking air downstream of the carb, but we checked all the gaskets and made sure everything was tight. The last thing I can think of trying it a bit of RTV sealant on the intake gaskets...
Back to top Go down
ferg
Member
ferg
Member


Join date : 2011-10-24
Points : 4582
Posts : 45
Location : Cheshire, England

Briggs & Stratton 18 Twin II will nly run on full choke Empty
PostSubject: Re: Briggs & Stratton 18 Twin II will nly run on full choke   Briggs & Stratton 18 Twin II will nly run on full choke Icon_minitimeOctober 27th 2011, 9:24 pm

Is there not a mixture screw??? I had this problem with a 12.5hp opposed briggs, but after a while it sorted its self out. you may want to take the carb to be ultrasonically cleaned, that has worked for me on many carbs for motor bikes and the like. Very Happy
Back to top Go down
Ford Boi
Member
Ford Boi
Member


Age : 39
Join date : 2010-08-22
Points : 5230
Posts : 242
Location : Yarmouth, Nova Scotia, Canada

Briggs & Stratton 18 Twin II will nly run on full choke Empty
PostSubject: Re: Briggs & Stratton 18 Twin II will nly run on full choke   Briggs & Stratton 18 Twin II will nly run on full choke Icon_minitimeOctober 27th 2011, 10:20 pm

Yeah I adjusted the main jet and the idle mixture and even very rich it still has trouble. I think I will dip the carb in some good cleaner, altho I have used spray cleaner and compressed air on it. Nothing was visibly clogged....
Back to top Go down
Jamus
Established Member
Jamus
Established Member

500+ Posts
500+ Posts

Age : 44
Join date : 2010-06-28
Points : 5568
Posts : 511
Location : Southern WV

Briggs & Stratton 18 Twin II will nly run on full choke Empty
PostSubject: Re: Briggs & Stratton 18 Twin II will nly run on full choke   Briggs & Stratton 18 Twin II will nly run on full choke Icon_minitimeOctober 28th 2011, 12:36 am

Sounds like what my 17hp opposed in my MTD is doing. I waited for winter to work on it but was assuming it was the carb needing cleaned. If you've done that and still have problems, I might also. Hope you figure it out.
Back to top Go down
http://www.rcbashers.com
product
Member
product
Member


Age : 32
Join date : 2011-10-03
Points : 4655
Posts : 76
Location : Ontario Canada

Briggs & Stratton 18 Twin II will nly run on full choke Empty
PostSubject: Re: Briggs & Stratton 18 Twin II will nly run on full choke   Briggs & Stratton 18 Twin II will nly run on full choke Icon_minitimeOctober 28th 2011, 2:23 am

mine only ran half choke so i ripped the carb apart and everythig had corosion all over it especially the main jet all the holes were corroded over (explains why its not geting gas) so i ordered an overhaul kit so im waitin on that:)
Back to top Go down
dangeroustoys56
Veteran Member
dangeroustoys56
Veteran Member

1000+ Posts
1000+ Posts!

Age : 53
Join date : 2010-02-10
Points : 6838
Posts : 1726
Location : Florida, USA

Briggs & Stratton 18 Twin II will nly run on full choke Empty
PostSubject: Re: Briggs & Stratton 18 Twin II will nly run on full choke   Briggs & Stratton 18 Twin II will nly run on full choke Icon_minitimeOctober 28th 2011, 1:40 pm

My 99 murray hydro ran horrible - even after multiple carb scourings- so bot a new carb kit ( comes with gaskets, pump internals) - after the rebuild it ran nice n smooth. The new gaskets are the key to making it run better - make sure you get the correct gasket ( comes with a few different ones) or it wont run at all.

Youll need the motor numbers ( all of em) and how many screws hold the pump to the carb ( mine had 3) - it was like $20 from my local Cub cadet dealer.
Back to top Go down
Sponsored content





Briggs & Stratton 18 Twin II will nly run on full choke Empty
PostSubject: Re: Briggs & Stratton 18 Twin II will nly run on full choke   Briggs & Stratton 18 Twin II will nly run on full choke Icon_minitime

Back to top Go down
 
Briggs & Stratton 18 Twin II will nly run on full choke
Back to top 
Page 1 of 1
 Similar topics
-
» Briggs and Stratton Opposed Twin Q/A 's!
» Briggs and Stratton twin smoking when running
» Briggs & Stratton Oppy Twin question
» 18 horse briggs v-twin full throttle surge
» Briggs & Stratton Opposed Twin Engine Questions

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: