BRIGGS AND STRATTON CARBURETOR REPAIR / GAS SHOOTS OUT OF MUFFLER / CRANKCASE FULL OF GAS

JEREMY FOUNTAIN
THEMOWERMEDIC1
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IS GAS FLOODING YOUR CRANKCASE? IF SO ITS TIME TO REPLACE THE FAULTY NEEDLE AND SEAT IN THE CARBURETOR

[@bloodspray666]

I used this video as a guide as I never touched one of these carbs. Pretty solid walkthrough. I was expecting to use the entire rebuild kit, not just a few pieces. The hardest part was getting the seat out. I used a few different wood screws and finally found one that was just right. Mower starts a lot easier now and doesn't shoot oil/fuel everywhere. Thanks!

[@theazguy]

Great informational video and very helpful. I have a John Deere rider mower with a 16 hp Briggs and Stratton engine. After several weeks of not running I attempted to start it but it was locked up and would not turn over when I attempted to start it. I removed the spark plug and fuel poured out of the spark plug hole. There was also a heavy fuel odor on the crankcase dip stick and the level was high. When I removed the air filter the housing was also filled with fuel. After watching your video I removed the carb and applied pressure to the fuel inlet. It would not hold any pressure so I am going to rebuild the card and replace the needle and seat. Thank you for making this video, I have a feeling it is going to save me a lot of money by not having to bring the mower to the local repair shop. Thanks again, very good video!

[@edwardgreco3089]

Thanks for your video you answered my question with the carburetor flooding the crankcase with gas as well as pouring out the air filter and exhaust I haven’t had to repair my mower in over 6 years

[@timzyrkowski9461]

First time here. First time I’ve ever see the carb disassembled bowl up like that. Great idea! I’ll be back!

[@THEMOWERMEDIC1]

Didn’t know there was any other way? Thanks for watching.

[@jimmarchman]

Best vid of its kind I have seen. Thanks so much!

[@JasonTylerRicci]

Such a great video. My B&S engine spits black oil out the exhaust and won't stay running. Working on the valves now and have a new gasket set on the way. Gonna look into the needle and seat as well. Thank you.

[@chrisvachon4665]

Thanks for the video. It just saved me. Running perfect now.

[@ronaldbechler1162]

I've learned a lot from you and watch all your videos. Thank you and keep up the good work. Michigan

[@colindriedger7158]

Thanks for the great explanation, I now understand why my engine is barfing fuel and oil out the carb!

[@crockettdumas4623]

Thank U, very helpful to us older that are not familiar with pressing in parts!

[@louispuglisi9867]

I was wondering how I was going to pull that seat, with out fn up the carb. You posted this right in time Thanks Good job on the video

[@dude8869]

I fixed the gas leak into the block years ago. I put a cutoff valve in the gas line, cut the valve off when I'm finished and let the mower run dry.

[@THEMOWERMEDIC1]

Yeah but if the needle and seat is leaking bad enough it could flood while running / idling

[@dude8869]

If running/idling it would blow it out through the exhaust. I would then paint a mongoose and snake on it and join "Big Daddy" Don Garlits racing! :)

[@malfaro4]

Yes sir i did, Soaked it in Berryman dip for about an hour as well.

[@alvinrussell9747]

you did not hold the old carburetor the same way you did the new one to test it the same way ?

[@Antares1415]

It's always good to replace the seat. I have found some engines struggling to run at full power due to the seat being old and swollen and actually restricts fuel at full throttle. It may idle fine but when more fuel is needed , the engine will run lean and misfire. The seat also, as the video states, can leak the fuel in the tank, into the engine crank case or combustion chamber. You can damage the piston rod when it leaks into the chamber due to hydro lock when you try to start it.

[@rickyrector7331]

Thank you very much I thought that was the problem I took the motor off and replaced the seal on top and bottom the cam looked very good the valves looked to operating correctly and I adj them when I put it back on the mower it cranked right up I always put a cutoff switch and filter on my mowers I had saw a clip on you tube where the exhaust seat was coming out I thought that was the problem but now I Sure it the float thanks

[@Jim-ie6uf]

Made a tool today. Went to local metal shop, 8” 3/8 brass rod was 3.00. Cut off 2.5 “ with a cut off wheel. I don’t have a lathe, so I chucked in the drill press , and holding the grinder at a right angle, trimmed it down. I don’t have. Briggs with

[@Jim-ie6uf]

I don’t have a Briggs carb with a brass seat handy, so I just eyeballed it. Maybe it will work, maybe not, but it was fun doing it. I don’t know the dimensions of the tool, can’t find them on line. If anyone has dimensions, please post. Thanks, Jim

[@THEMOWERMEDIC1]

you have check valve issues with the high speed jet....pretty much a new carb....did you blow it out with compressed air?

[@THEMOWERMEDIC1]

VERY HUMID HERE IN TEXAS!

[@antoniomarc7174]

Great repair…👍👍

[@ErinKennedy-qo6gd]

I have a ? We are building an little mini quad with a Briggs engine we got a new carburetor 2 times not and now the gas is coming out the carburetor how do we fix it every time we try to push the throttle all the way down it shuts off

[@w96725]

Thanks for the help.

[@Ben-fu3pd]

Quick question whats that lil do dad at the bottom of the carb with the wire connector? a buddy of mine has a 12.5 pull behind mower.. strted pouring gas out like no tomorrow... but im curious about the lil part because his has no wire connected to it and no wire to be found to connect to it..

[@fred306801]

Your calling that brass looking peace the seat, right ? Is that something that normally wears out ? So does the needle have a rubber tip ? On some mowers they have a little round rubber washer that fits into the carburetor. Its got a hole in it so the needle can let the gas pass through. I have not worked on one like your showing here. I am working on a Briggs 17.5 OHV, POS and no matter how I adjust the screws it surges. When I run it at full throttle it runs ok, not great. Just replaced the head gasket and set the valves. I am thinking I may have to rebuild the carburetor. Got any suggestions ?

[@kentmorris7811]

There were more parts in the rebuild kit. What are those and should/how do I use them? This info is the best I've seen. Thanks for doing this.

[@THEMOWERMEDIC1]

Multiple model kit. I save them but can be discarded

[@kentmorris7811]

Got it. Thanks. Easy fix.

[@henryquez260693]

hey im having some trouble with my lawnmower carb , wondering if u can give me some advice to fix it . thanks

[@TheKayakdude]

Where did you get the air pump to test the needle and seat?

[@matts8621]

I know the black goes to fuse where does the red wire connect to

[@kathleenrobinson4379]

Thank you for this excellent video - I am needing to be more self sufficient and handle more repairs on my own and your video is extremely helpful. I have a question that is so basic that I actually can't find an answer to it. I had the stuck carbureter needle and now i need to drain the gas it out of my crankcase - is it as simple as draining the oil out? I have the 28M707 (0122) - can you confirm what I need to do to drain the gasoline? Thank you so very much for your time. -Kathy

[@cnitmann58]

Hi thanks for the video what if gas vapors spray out of carburetor when cranking Briggs n Stratton 12 HP

[@Nickadoo500]

like we have thin snap-on wrenches just lying around... some of us aren't made of money to just have crazy expensive tools like that... i guess i got to grind a good wrench now...

[@matts8621]

I have an older craftsman b&s electronic ignition rototiller the red cord that is screwed into by gas tank what does it connect to?

[@AmIonArock]

Sir, I'm thinking you have nailED what is happening to my Murry , I could not believe all the fluid that came out of machine. I wasn't sure if it was oil or gasoline or both. I got the head off right now. I really didn't see a problem with the head gasket. But the carburetor was really wet inside and kind of think something wrong there and needs investigating. I saw a video "how fix 90% of the lawn mores with problem" (or something like that) In the video they cut the plunger on the Solenoid thats n the bottom of carburetor bowl to stop backfiring I think. Well I did look at that and well either a mechanic or previous owner already cut that plunger off on the solenoid on mine. So now I wondering is that solenoid part directly involved with that seat that you fixed or is that another inlet or jet?

[@DennisCamaro]

Im having problems with my briggs 20 hp rider. It was running good one day and the next it starts surging. It doesnt smoke or anything it just surges to the point where it doesn't run anymore. Pulled carb off, cleaned it but didn't see any build up or junk in the carb.

[@stanserwon5389]

+Dennis Manvell Dennis, you're not getting gas IMO. check your gas cap. if the vent is blocked it will not allow air in to displace the used gas. This creates a suction at your carb and it'll starve. pop the cap off & cover it with a rag etc., then start your mower & see what happens.

[@daghost6791]

Question?.I have a 12hp Briggs & Stratton engine on a Craftsman riding mower and it sputters and acts like it wants to cut off when I'm cutting semi-tall grass or thick patches of grass. I cleaned the carb, reattached the linkage correctly and it still does it. It also does it when I'm just riding in high speed without the blades engaged. Any suggestions?...Thanks...great vid's by the way

[@tommyhinton3884]

Hey great video! I have a B & S 5 HP on a tiller thats been kicking my butt. When I start it, with starting fluid otherwise it won't start, it dies after like 2 seconds. Well I cleaned up the carb and went to change the oil and BAMMM....looks like milk. So I take the bowl back apart and the little red rubber gasket under the needle looks like it might need replaced. Does this come in a 5 HP rebuild kit?

[@lyntalcott]

was this a Nikki carb or the walbro? if it wasn't the Nikki is it the same procedure for that one ? i've got a lt2000 having this same issue. i also have to adjust the valves on it

[@zx8401ztv]

Good tutorial mate :-) Like the extraction method, clever :-) Looks like its in damp conditions, the flywheel and ignition module rust.

[@simulationarts]

I have a Craftsman LT1000 with a Nikki carb that has been cleaned thoroughly and is getting fuel into the bowl.The gas is new. I have a good strong spark, The valves are lashed correctly, and it has plenty of compression. It will not start, unless I put gas into the cylinder, and then it will only run on the gas I put in. It also does the same if I spray starter fluid into the throat of the carburetor. It seems as though the gas is not getting drawn out of the carburetor. I am stumped on this one. Any thoughts?

[@THEMOWERMEDIC1]

THANKS!

[@DebJo912]

I generally just buy a new aftermarket carb instead of buying a kit. It's cheaper and simpler to change the whole carb. An aftermarket carb for any riding mower is anywhere from $10 to $14 on Amazon or Ebay. Just search your particular part number.

[@elevatorman427]

is there a certain size wood screw you used there

[@fosgate375]

Good video. I have been have fits with a B&S engine, model # 283H07-0399-E1 with a Nikki carb. The crankcase keeps flooding. I have replaced the float, float pin, needle, bowl, and bowl gasket yet the throttle body continues to fill up. There isn't a seat for the needle to sit in so that's something I couldn't replace. The carb has been cleaned, recleaned, and then recleaned again about two more times. I have also tested the fuel solenoid and it is working as it should be. I pulled the air filter and air intake pipe off today and opened the in-line fuel valve (I put one in along with new fuel lines) and found that gas is pouring out of the atmospheric vent on the carb. Can you recommend something I can check? Think maybe I bought a faulty needle? Thanks again for your help.

[@AnthonyFDeLeo]

I am working on a Murray rider with a Nikki carb on a Briggs 28V707-1113-E1 engine. It is flooding like the one you showed. I cannot figure out how to remove the seat, appears to be different than the one you showed. Thanks Tony Port Hadlock, WA

[@selinestewart9906]

I replaces my Carburetor and now my muffler is getting really hot and blowing smoke out what did I do wrong

[@jerryharrison2614]

I have a craftsman riding lawn more with Briggs and Stratton 18hp intec engine with walbro carb. I am going to put a kit and am going to take everything including fuel/air mixture screw out to soak carb in carb cleaner. Can you tell me how to adjust fuel air mixture screw when I put it back together. I am good on everything else. And would you happen to have an online video showing this procedure. Thanks. Jerry.

[@milusoscualquierascz265]

Hey mowermedic1 I’m working on a Kohler engine that pops while is running leaks little gas from mofletes. I already cleaned carburetor still doing the same. It’s a bandit stump grainier with a kohler engine command 624cc any idea what it would be?

[@THEMOWERMEDIC1]

Replace The carb with OEM

[@milusoscualquierascz265]

@@THEMOWERMEDIC1 I will do that. Thank you

[@rtzapper]

Jeremy i have s stihl fs85 weed eater how can i find the fuel line hose part number? I want to order a new one online but i want to make sure i get the right one. Thanks

[@brianmott728]

I have a lawnmower that has a flooded engine and I replaced the seat and needle. It also has an automatic choke. Why would that be happening?

[@MrGarydcoleman]

Hey man i got a question.i got a 92 murray 17 hp when i'm mowing i gotta work the choke back to close before it will stay running especially if the grass is a little high do you know what could cause this problem? thanks

[@briantriplett2395]

mower medic I'm having a issue similar to this video my Murray 12.5 Briggs it's shooting gas by the Grove out of the exhaust and it will not start due to this issue. do I need to replace the carb or rebuild it.

[@kevinm3561]

I ordered a brand new carburetor for my B&S 17.5HP engine. I have a wet spark plug with gas and gas is spilling from the carb. Did I receive a bad carb. Or do I need to do an adjustment on the new carb?

[@THEMOWERMEDIC1]

New gas lines and fuel filters?

[@newtuthis1]

I have on on a snapper it's A Nikki and it bench tests fine the minute I mount it on the engine it floods the crankcase I am beyond agrivated I have rebuilt it twice with all new parts including float and plastic float holder that snaps into the carburetor any ideas or replace it

[@Lovinflyindrones2022]

Hey do u know t bone at Raileys small engines?? He's got a cool channel like you do

[@donraabe3529]

Great video. Do you have the part numbers of the two different size seats?

[@rb2whrider9836]

Hey Jeremy, It's nice to see you helping all us back yard mechanics! My daughters 22 horse B+S Intec engine has several issues. I got it to run with new Battery. Now the Fuel system seems to be part the problem. Engine won't rev up just idles, runs rough and it back fired last time I shut it down. I pull the throttle back and forth still just idles and choke doesn't change because it's not working either? How is this linkage supposed to work? I have carb apart and will get repair kit, but all is looking good inside? I have yet to force air in passages. Thanks for any help. Ron B.

[@BrucesShop]

Thanks Jeremy Bruce

[@robertreddell7021]

I have a 16.5 hp what seat and needle part numbers do I need murray select 42

[@pablom8428]

Where do you order the gaskets from?

[@stevedananay3136]

After trouble shooting the NIKKI flooded carburetor, running rich problem with my 10.5 I/C Intek Briggs and Stratton engine, I found the problem: the round o-ring of item 137A, after 6 years of service, compressed into a rectangular cross section. It is supposed to be a typical O-ring with a round cross section. I replaced the O-ring with one that was close in size because that was what I had available. It started right up and ran fine. I hope this will help someone from replacing the Float Needle, Float, Main Jet, etc. Good Luck!

[@danitrue5703]

Very helpful. Thank you very much

[@troyp5903]

I HAVE A TROY-BUILD BRONCO THAT IS DOING THE SAME THING WHATS THE PRICE TO GET IT REPAIRED BALL PARK PRICE? TY

[@adambrooks13]

How did you get all of the oil out?

[@jaedendeboer765]

My Briggs and Stratton lawnmower engines air intake where the air filter is fills up with gas and i dont know why.

[@jimmonte9826]

What are the diameters of the orifices in the seats for the two different applications?

[@THEMOWERMEDIC1]

No idea. Big hole = gravity flow small hole = fuel pump

[@jimmonte9826]

@@THEMOWERMEDIC1 Thanks for replying, but I am interested in what "big" and "small" are. I am trying to get an 11 HP B&S engine with an unknown history running. It starts and runs OK at light load, but it seems to be starving for fuel when loaded. I bypassed the shut off valve and fuel filter with new hose to the gas tank for testing and saw no improvement. The carburetor is an aftermarket model, and one possibility is that the inlet seat is for a model having a fuel pump. So the sizes would be useful to compare with what I have.

[@jimmonte9826]

I have measured three inlet seats that should be gravity flow, and a #48 drill (0.076 inch) could be inserted in them

[@CelticCutie]

It would have been nice if you had videoed getting the carburetor off of the engine. Can you do that? I haven't the slightest idea how. THanks.

[@pn3676]

Can you do a pressure test with the carburetor bolted to the engine?

[@RANGERVETBRET]

THANK YOU VERY MUCH

[@TexasDJ67]

Hello sir, I have a Briggs on my generator and my issue is gas is running out of the carb after starting and it died. So, i turned the gas off at the line and waited a while before starting again, now i have it on level ground it started but now it stuttering as if it wants to shut off. Now when i turn the gas supply line off to the carb while it's running and it runs great...... I'm scratching my head over here. Can you assist in any way. Thanks in advance.

[@THEMOWERMEDIC1]

I don't usually buy an entire kit. Needle&seat and a bowl kit for about 13 dollars

[@843292]

Good video, great explanation, you do it right! Thanks!

[@Patsgarage97]

Just did the same repair!

[@Danandria]

Hi Lawnmowermedic, I have a John Deere L118, and I had to replace the gaskets at the base of the intake manifold as I could see gas vapor leaking. However, the engine is still popping, and with the air filter off, it looks like gas vapor shoots out the air intake when it pops. What could be the issue?

[@philliphall5198]

Adjustment on valve lash

[@Travis_H]

the kits for these carbs are about $50 and the whole carb is about $90, I usually replace the carb when working on them

[@gravelyhighpriest]

My float valve needle is stuck in the seat. How can I free it so I may remove the float without destroying the Float. CMV

[@bobaustin7102]

serial # for carb is idetified on Briggs website it is on plate on motor usually near muffler good video shows tillers mowers etc...

[@jimdavidson5208]

Like Jeremy texted in the video. Install a paper fuel filter, fuel shut off valve and NO ethanol fuel. And change that nasty filthy dirty assed oil. Only takes a whopping 1.5 quarts for a rider and 18-20 oz for a pushy.

[@wtbm123]

Good video.

[@mrih1586]

How do you remove the choke plate and shaft on one of these? My throttle plate has screws that hold the plate to the shaft. No problem to remove it. The choke plate has no screws to the choke shaft. There has to be a trick to removing it? The carb is a Briggs Walbro 5-4993 Thanks in advance.

[@bobhaddock957]

pull the plate out of the slot with needle nose pliers. he does not show this even though he has the new spring to go on it. pull the plate out - pull the shaft out - replace the spring and foam - put the shaft back in.....remember how you pulled it out.....push the plate back in

[@n5yiz]

excellent video

[@wcjcnc]

Do you have a video about NIKKI carbs doing this? NIKKI carbs drive me crazy.

[@erickaji0clementsup950]

I have been working on this product suite, welcome friends to consult

[@malfaro4]

Oh Damn !! I did not know that ! thanks for the advice... Maybe you could do a video on that as far as not using it for the two stroke carbs bro. FML..lol

[@639Beaver]

Great video.

[@bowmanw1839]

I can't stop my newer style carbs from hunting even after cleaning. (reving up and down) Will not run smooth unless I partially choke the carb.

[@weirdwilly2066]

I have a 21 hp briggs doing same thing ? Seem like it may be running lean. Did you figure out what it was.

[@bowmanw1839]

No these carbs today don't have the adjustments they use to have. They are almost a throwaway to me. I really don't have an answer and can't get an answer that I agree with.

[@THEMOWERMEDIC1]

COOL DUDE!

[@carlosbosquez298]

Hi can someone help me please? my mower start spending a lot of gas what can be the problem?

[@anievestor]

Hi Jeremy. I have the same carb on the same engine but after I do the carb overhaul it still leaks gas into the manifold. Now one BIG difference with you carb in the video and mine is the whole seat assembly on mine is plastic. No seat ring no nothing! At first it leaked gas into the oil. Fixed that by fixing the seat. It was drooping down. Used a blow dryer to soften up the plastic and gently fixed the arm. But still, how can I fix this leak if the whole assembly is plastic. Frustrate Tony. Thanks for a great video.

[@danielolmos1358]

I have a 12.5 Briggs engine in a rider mower that I bought for $40.00 only it didn't have a carburetor. I'd like to find an inexpensive carb for it and even considering finding a donor motorcycle carb. Do you have any suggestions? The Briggs model# is 289707 type:0154-01. I think the carb that belongs to this engine is a Walbro 5-4993 LMT? Anyway, I'd appreciate suggestions and/or sources for an inexpensive solution. Thanks

[@MRrwmac]

Can you point me to a carb adjust video of yours or tell me how for a B&S 18hp OHV Intec on a CM LT1000? Thanks for sharing.

[@Colsell944]

I have this problem! i found gas in my oil. carb is in my lap, while watching your helpful Video. Do you think you could show us the proper way of take off the linkage and reinstall, cause mine came off one end and Damit i didnt see wich way it was.

[@toleeteam]

allthumbsdiy.com/power-tools-2/fast-and-easy-fix-for-your-generac-wheelhouse-5500-5550-portable-generator-part-2

[@knowledgeseekerr]

THANK YOU SO MUCH :) This helped me out a ton! Thanks.

[@tf7274]

If you install an inline fuel shutoff valve and run the mower empty...you'll have less chance of this happening later on. It used to be "never remove all the fuel from your system" just add stabilizer...but with today's fuels that degrade fast...its better to be dry.

[@mule666]

I have a problem with scooter carb...when driven ..gas is spraying from back of carb airfilter is soaked in gas ..what can this be ? Its a 2stroke bdw

[@THEMOWERMEDIC1]

Exhaust system clogged

[@mule666]

THEMOWERMEDIC1 THE SMALL ENGINE SPECIALIST strange replaced the exhaust recently..think its on for half a year or so..are there other options or still think exhaust?

[@davidkocsis2891]

I forgot to take a picture of the linkage before I removed it can you take a close up on how the throttle linkage and the other linkage looks correctly replaced Thanks

[@rtzapper]

got it thanks im ordering it

[@warrencopeland5341]

I work on small engines but I have one that has me stumped. I have a Subaru 7 HP EX21 that's on a pressure washer. I have wore this thing out trying to fix it. It is leaking gas into the cylinder and filling the crankcase. The brass seat in the carb is perfect and I even polished it with a Q-tip in a drill with some metal polish. the needle is new, the float bowl is good. It still leaks gas into the cylinder and into the crankcase. I have tested this carb on the work bench with it mounted in a vise with a fuel tank hooked up to it and it doesn't leak. Put it back on the engine and it leaks. What the hell is going on??>

[@THEMOWERMEDIC1]

Carb vent obstructed when everything is mounted up to the engine check that first then I'd lean toward needle and seat.

[@alexbowie6316]

Great vid. Where is the carb vent in these Nikki, I have a Yam F4a outboard with that carb that overflows at the top plate. There are two gaps in the gasket. These may be for venting?

[@boundb]

How can you tell a walbro carb from a Nikki? Model 31C707 type 0175E1 code 021217ZE stamped on engine

[@bowmanw1839]

Briggs & Stratton uses both these carbs on there engines. You will have to look at the carb to see which one you have. They are plainly marked, written on the aluminum Walbro or Nikki. Either brand will work on your engine. You have to have the proper model number. Although 14 to 20 HP will use the same carbs pretty much.

[@larrygaskins23]

Put a shut off valve in the gas line before or after filter. Shut off after each use. Winter storage shut valve off and run engine until gas out the carburetor. Problem solved.

[@THEMOWERMEDIC1]

Larry G that’s just a bandaid and not a fix. Just fix it right the first time

[@larrygaskins23]

Sorry, all I can afford is a band aid. But because of you I can fix the problem when I have no other choose. THANKS

[@malfaro4]

How about if I did a Carb rebuild on a Zama Carb on a leaf blower and its flooding as well, is it the same type of problem, The seat? I have not tried it yet but i dont think i have to prime it now, if I do It puts to much liquid into the cylinder.