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Walbro LMT Carb, Only Runs on Full Choke #4492501
08/19/17 02:49 AM
08/19/17 02:49 AM
Joined: Mar 2014
Posts: 34
Pennsylvania
Kevinmcc2 Offline OP
Kevinmcc2  Offline OP
Joined: Mar 2014
Posts: 34
Pennsylvania
So I have a generator that has a Walbro LMT carb on it but it only runs on full choke. I pulled the carb off 3 times so far tonight and used 2 cans of carb cleaner with no luck.. Am I missing something here? I pulled the main jet emulsion tube out and made sure that all the little holes on the sides are cleaned, shot cleaner down every port I saw but nothing. Is there a port on these carb that is harder to find?

Re: Walbro LMT Carb, Only Runs on Full Choke [Re: Kevinmcc2] #4492506
08/19/17 03:57 AM
08/19/17 03:57 AM
Joined: Jan 2011
Posts: 2,725
N.Ohio
Lubener Offline
Lubener  Offline
Joined: Jan 2011
Posts: 2,725
N.Ohio
Considering the low cost of a rebuild kit, I would do a rebuild or just replace it.. Sounds like you are reusing old gaskets, they could be leaking enough to lean out the mix.


The "thinking" man's friend.
Re: Walbro LMT Carb, Only Runs on Full Choke [Re: Kevinmcc2] #4492526
08/19/17 06:22 AM
08/19/17 06:22 AM
Joined: Apr 2013
Posts: 171
Kevil,Ky
vwmaniaman Offline
vwmaniaman  Offline
Joined: Apr 2013
Posts: 171
Kevil,Ky
If you use any ethanol fuel, it will clog the jet size with a yellowish gum that clings to the wall of the jet. You can still see thru it and carb cleaner won't cut it. Remove the jets and use a set of wire cleaners for welding torches to clean out each jet. They have the welding jet cleaners at Harbor Freight very cheap. When you have it clean, put about 4 oz of Sea Foam in the gas and try again.


Don't waste your time on a slipshod repair.
Re: Walbro LMT Carb, Only Runs on Full Choke [Re: Kevinmcc2] #4492530
08/19/17 06:35 AM
08/19/17 06:35 AM
Joined: May 2010
Posts: 9,067
North Carolina
spasm3 Offline
spasm3  Offline
Joined: May 2010
Posts: 9,067
North Carolina
Disassemble the carb and clean it. On some carbs there are multible jets, venturis that get plugged. I use some small .014 wires to clean them. Berryman b-12 is a much better solvent that seafoam. Seafoam is 40% pale oil. The alternative is to buy a new carb. But on a generator that sits, even the new carb will eventually gum up, so it pays to learn how to disassemble and clean them. As mentioned above, the gaskets can leak , leaning things out.

Last edited by spasm3; 08/19/17 06:37 AM.

13 elantra 70k 5w30 QSUD
03 chevy avalanche79k synpwr 10w30
01 saturnsc1 185k synpwr rebuilt
17 mazda cx-5 5600 miles m1 0w30
Re: Walbro LMT Carb, Only Runs on Full Choke [Re: Kevinmcc2] #4492575
08/19/17 07:53 AM
08/19/17 07:53 AM
Joined: Jun 2002
Posts: 2,707
Southeastern USA
FowVay Offline
FowVay  Offline
Joined: Jun 2002
Posts: 2,707
Southeastern USA
Make sure there are no splits in the fuel supply line. You're running excessively lean which means either not enough fuel or too much air. Fuel supply could be clogged jet or split fuel line. Too much air could be leaking gasket or cracked manifold.


Quaker State across the board.
Re: Walbro LMT Carb, Only Runs on Full Choke [Re: Kevinmcc2] #4492708
08/19/17 10:21 AM
08/19/17 10:21 AM
Joined: Jan 2007
Posts: 17,501
Clovis, CA
Merkava_4 Offline
Merkava_4  Offline
Joined: Jan 2007
Posts: 17,501
Clovis, CA
They're showing some air bleeds that might need cleaning and also a welch plug that might need to be removed. Welch plugs get destroyed during removal so you'd have to replace it if you went that far.

http://outdoorpowerinfo.com/repairs/briggs_walbro_lmt_carb.asp

Re: Walbro LMT Carb, Only Runs on Full Choke [Re: Kevinmcc2] #4492794
08/19/17 12:30 PM
08/19/17 12:30 PM
Joined: Jun 2003
Posts: 5,921
Illinois
SHOZ Offline
SHOZ  Offline
Joined: Jun 2003
Posts: 5,921
Illinois
I had a snowblower that needed choke to run. Turned out the timing was off due to the flywheel key almost completely sheared.


2008 Hyundai Accent 1.6L 5 sp manual hatchback
2010 Hyundai Genesis Coupe Track 2L Turbo 6sp manual
Re: Walbro LMT Carb, Only Runs on Full Choke [Re: Kevinmcc2] #4492850
08/19/17 02:01 PM
08/19/17 02:01 PM
Joined: Nov 2009
Posts: 1,057
Warner Robins, GA
nwjones18 Offline
nwjones18  Offline
Joined: Nov 2009
Posts: 1,057
Warner Robins, GA
Lately I've been finding replacement carbs are so cheap they aren't worth taking apart. The carb for my generator was $12 on amazon..


1988 F-150. 4.9 I6 247k. 10w-40 Castrol Syn-blend ACDelco UPF2.
2005 Cadillac STS N* 108k. 5w-30 Castrol Magnatec ACDelco Classic PF61
Re: Walbro LMT Carb, Only Runs on Full Choke [Re: nwjones18] #4494131
08/21/17 01:25 AM
08/21/17 01:25 AM
Joined: Aug 2017
Posts: 2
New York, USA
Shaunsmith Offline
Shaunsmith  Offline
Joined: Aug 2017
Posts: 2
New York, USA
Helpful thread

Re: Walbro LMT Carb, Only Runs on Full Choke [Re: Kevinmcc2] #4494805
08/21/17 08:49 PM
08/21/17 08:49 PM
Joined: Oct 2016
Posts: 65
Heart of Dixie
riklyn Offline
riklyn  Offline
Joined: Oct 2016
Posts: 65
Heart of Dixie
watch the you tubes. there is something on there that covers it.

also ethanol will kill OPE, don't care what anyone says, (unless they are real anal about not leaving it in). the carb on my high dollar Echo trimmer and husqavarna blower (Zama) were both made in China and factory replacements off Ebay were less than $20 each.

also you may need to replace fuel lines.

let us know if you find what works. I have a 15 y.o. Honda 1000 that is doing pretty much the same thing.


2016 Dodge Ram 5.7 Hemi
2004 Wrangler TJ (Unlimited) 4.0
Re: Walbro LMT Carb, Only Runs on Full Choke [Re: riklyn] #4494954
08/22/17 06:58 AM
08/22/17 06:58 AM
Joined: Jan 2016
Posts: 608
Nebraska
Duffyjr Offline
Duffyjr  Offline
Joined: Jan 2016
Posts: 608
Nebraska
Had this happen with my blower, would only run with choke on first click then eventually that winter it required two clicks but when it got under load it would start stumbling. Went to get a rebuild kit and the guy gave me the kit but also gave me a little bottle of Star Tron and told me to try that first. After a couple more times of using the blower it started clearing up and eventually started running with out the choke. I still have the kit and never did use it. I just put a couple cap fulls in every time I fill it up.

I do agree that these carbs are so cheap that may be your best option. I got one for $15 off ebay just in case it happens again.


89 GMC Sierra T5 10w30/Wix
08 Lucerne CX NAPA Blend 5w30/Napa Gold
18 Toro Super Recycler T5 10w30
Re: Walbro LMT Carb, Only Runs on Full Choke [Re: vwmaniaman] #4495135
08/22/17 11:47 AM
08/22/17 11:47 AM
Joined: Jun 2011
Posts: 1,039
Texas
wag123 Offline
wag123  Offline
Joined: Jun 2011
Posts: 1,039
Texas
Originally Posted By: vwmaniaman
If you use any ethanol fuel, it will clog the jet size with a yellowish gum that clings to the wall of the jet. You can still see thru it and carb cleaner won't cut it. Remove the jets and use a set of wire cleaners for welding torches to clean out each jet. They have the welding jet cleaners at Harbor Freight very cheap. When you have it clean, put about 4 oz of Sea Foam in the gas and try again.

All you need to use is small STEEL wire that is relatively stiff. I use twist ties with the plastic removed. Most twist ties use 27 gauge steel wire. They work well and don't cost anything. After poking the wire through all of the small orifices, spray carb cleaner through them to clean them out.

Re: Walbro LMT Carb, Only Runs on Full Choke [Re: Kevinmcc2] #4500559
08/28/17 05:38 PM
08/28/17 05:38 PM
Joined: Aug 2017
Posts: 2
New York, USA
Shaunsmith Offline
Shaunsmith  Offline
Joined: Aug 2017
Posts: 2
New York, USA
Very helpful best vacuums .

Re: Walbro LMT Carb, Only Runs on Full Choke [Re: Kevinmcc2] #4500587
08/28/17 06:15 PM
08/28/17 06:15 PM
Joined: May 2010
Posts: 9,067
North Carolina
spasm3 Offline
spasm3  Offline
Joined: May 2010
Posts: 9,067
North Carolina
I use .014 stainless stylets. If some of you want some let me know.


13 elantra 70k 5w30 QSUD
03 chevy avalanche79k synpwr 10w30
01 saturnsc1 185k synpwr rebuilt
17 mazda cx-5 5600 miles m1 0w30

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