Fix 90% of Briggs lawn mower not starting problems. Easy repair.

hey YouTube thanks for checking out my channel today we're going to be working on this thing now if you have a Briggs engine on any mower it doesn't have to be just the weed eater but a Briggs engine that has this type of a carburetor system you may be experiencing problems some of those problems maybe not wanting to start in the spring after you ran it all summer the previous it may be something like this where you pump the bulb and it just stays in it could be that you have a hesitation and then it clears itself out and then continues to run smoothly after that or it could be just it doesn't start it's not like it's getting fuel you have good spark but you're not getting fuel I'm going to show you how to fix these carburetors 90% of the time and it's very easy to do you're gonna need a can of carb cleaner you're gonna need a flat tip screwdriver obviously take off the air filter you're gonna need some sort of a scribe possibly or a flat tip screwdriver that's small that you can make us line with in aluminum you're gonna need a 3/8 socket you're gonna need a 1/2 inch socket I've got an extension for the 1/2 inch you're gonna need a ratchet and you're going to need a screwdriver a Phillips now in this case I'm getting rid of the ratchet and the Phillips and doing my lazy act and I'm using a Phillips on a drill driver and I'm gonna use this as my ratchet it goes a little bit quicker but a Phillips and a ratchet is all that you really need so they're basic tools and you're gonna fix 90% of your carburetor issues with these tools so let's jump into it alright the first thing you're going to do obviously is remove the air filter now something you want to take a look at is whenever you're tipping your mower over look at the blades or anything like that make sure that you tip the mower carburetor up or spark plug up one or the other you can't tip it any other way and the reason I mention that is I messed around with the air filter here is because a lot of times people have tipped their carburetors the wrong direction and have taken the oil from the engine and allowed it to come through the carburetor and fill this air filter once this air filter full of oil it's not going to allow the engine to get the air that it needs and it's going to try to run on the oil that it's sucking in that's not going to work so be cautious of that so the first thing you want to do is look at the air filter make sure it's not clogged and make sure it's not full of oil after you've done that now you have to basically remove the two mounting points for this carburetor the first one's going to be a 3/8 bolt and that's this bolt right here I'm putting the socket on there back it off you can throw it down in the valley here of the deck if you want to just to maintain it okay so the next one you're going to remove with is this bolt right here it's a half-inch and there it is and I'll put that also on the deck now this is where it becomes slightly tricky and that is you're gonna wiggle this gas tank off now when you wiggle this gas tank off all you're doing is pulling the carburetor off of a vacuum tube now there's a tube here that will be coming unseated you don't have to worry about that but as you pull this off there's going to be an o-ring that's here or a plastic ring you want to make sure that you don't lose that and it doesn't get misplaced now at this point this linkage is the only thing that's holding it on you're just going to tip it and it comes right out you can see that thing is bent and it goes down into this hole right here there's only one hole that it can go into also you got to make sure that you don't lose this o ring this Oh ring is very important to keep the carburetor running okay so here we have the carburetor and here's the two pieces that had come apart now this could be an issue again if you lose these two pieces as you pull the carburetor off of that tube that runs to the engine it's not going to run you need to have these sealed so it works so what I'm going to do is I'm going to take some curb cleaner I'm going to clean this out real well and then I'm going to reassemble this okay so I went ahead and I clean this out just spray car cleaner in there now I'm what I'm going to do is I'm gonna place the o-ring in there and make sure that it seats real well there's a pocket that it fits in it only goes so far and then this plastic ring here goes in and retains that and keeps it where it should be so you're going to put that in there and clip it in and that's it that's all taken care of so let's jump into the next part okay so the next part is even easier I think and that is to clean this off with carb cleaner you want to spray all this area off right through here to get all this gunk that is built up you can see there you maybe take a brush and brush that off initially to get the big stuff off but you want to clean it all around that so whenever you lift this off which I'll show you how to take that off you don't get any debris falling down in there okay now I got all that cleaned off I used my air gun now it's a good idea if you have an air compressor go ahead use it if not you can use a toothbrush and clean around that and again take the car cleaner and spray and get it away from the painted surfaces as quickly as possible because whatever you put it on it'll pretty much wipe off the paint so what we're going to do now is there's going to be five screws that we're gonna remove they're just Phillips head screws that's where that Phillips screwdriver comes into play I'm gonna remove this air filter gasket just so I don't lose it and this here I'm just going to leave on because it's not really in the way but just be cautious of it in case you accidentally drop it or or misplace it you need to have that to hook this back into the engine so let's go ahead and remove these screws and I'll show you what it looks like whenever we're pulling it apart okay now that the screws are loose what you want to do is you want to carefully separate the carburetor from the tank now on this one in the past I have worked on it that's why this came apart so easily but be cautious of this gasket here in this diaphragm now I'm going to put the link down below you can click the link it's going to take you right to these two parts because it's a really good idea to have them if you're going to do this repair in this case I'm gonna reuse what's already there although it looks like it's a little bit worn I'm still going to go ahead and try to use it and see what happens because I believe this will work regardless now this is where you got to be cautious of a few things and this is what the look or basically this tube here make sure that it doesn't have any debris causing it to be blocked I'm gonna take card cleaner and I'm gonna spray up in there then I'm gonna take my air gun I'm gonna blow up in there if you want to just put a cloth over top of this and blowing it with your mouth and that should make sure that it's clear okay you're gonna pull off this screen here and make sure that's clean don't forget to put it back on you're going to spray card cleaner in this area you're going to spray car cleaner and clean anything off that you see that's dirty in here now one of the screws just fell I'm not too concerned about that but I am gonna push these screws out just in case you don't know what it looks like in here and it comes apart differently for you and that is this gasket here once the stick to the carb body so peel it off carefully as not to break it if you're going to reuse again I suggest that you buy a new one now inside here you can see there's a spring and I'll spray this with carb cleaner I also clean this off to some extent but this really isn't the culprit at this point so let's go ahead and just shoot this real quick with some curb cleaner hitting those spots that I talked about and then I'll spray the gasket and then I'm going to reinstall all this back on the carburetor at this point this is pretty much cleaned up I'm going to put this screen once I clean it I'm gonna go ahead and put this screen back on there we go now this is kind of the critical part everything that I just showed you if you can pull this carburetor off of the tank without any of this coming apart you're gonna be pretty much set as far as the gasket this is what you need to look for and that is debris down inside this well so what I'm gonna do is as there is some dirt in there I'm going to spray some curb cleaner in there spray some curb cleaner all around make sure it gets cleaned off and then I'm going to take my air gun I'm going to blow inside here to make sure all this comes out okay so now I got all that cleaned out you can see it's nothing but shiny metal down there that's what it should look like now for you guys that are experiencing a problem with it running and then shutting down and loading up and then clearing itself up Briggs had a problem with these carburetors and this is the only downfall that I've ever found with them and that is this gasket here because of the distance between these two screws really didn't get enough support to allow this gasket to stay adhered to the tank like it should so basically what happens is this gasket gets pulled back and there's a gap that develops and it makes it to where it doesn't want to run but the gap sometimes it's so small that it just takes a little bit of fuel to seal it off and that's why it runs and then it shuts off there's a way to cure that and that is to take your scribe or your screwdriver and you're going to make a wine on your tank you're basically going to make something for that gasket to hold on to you can see here I'm just scratching tank I'm just putting another edge there for it to grab on to kind of a quick fix and this is what Briggs told us to do now at this point I'm going to reinstall everything the screens on the gasket the tubes clear and when I install it I'm actually going to try to position it to where the gasket might be a little bit further this way than what it should be that also helps out with that gasket trying to creep back in and of course the first couple screws that I'm going to tighten are going to be the ones on this side because I want that gasket to be secured there go ahead and put all the rest of screws in now okay so at that point the carburetor is done it's ready to go back on see it was really easy so I want to make sure I want to return my air filter gasket back on to the carburetor and let me reposition the camera and show you how it goes back on the first thing you're going to do is make sure that you get this small linkage into that hole that we took it out of like I said there's only one hole and that's it that's all there is to it now there's a smaller hole that's next to it it won't fit so you don't really have to worry about that one then at that point you want to line up the tube here with that Oh ring that we replaced inside the carburetor also you want to make sure that this breather tube is going on at the same time and slide it on right now the carburetor is on believe it or not now all we have to do is tighten it down to make sure it doesn't come off first thing I'm going to do is replace that half-inch screw now the 3/8 bolt goes in the front as far as the carburetor repair it's done you can put on the air filter and push the ball primer bulb and make sure that it starts that's really all that needs to be done at this point however I want to also talk about one other problem if your mower has been running great but all of a sudden it has had a problem of some sort you want to make sure this linkage stays free make sure that you didn't run it underneath a tree and accidentally bend this because this is how it you adjust your idle these engines run about 3,100 to 3,300 rpms and if you hit this it will make it to where the tension on this spring against the governor won't be like it should and it will make it to where the engine runs at a very low rpm also these have a tendency to move around it's ok as long as this spring doesn't get affected as far as its overall tension although this is moving the tension going to that governor the vane governor isn't that much so you can if you want bend these down to where this doesn't move at all because all your adjustments done right here the reason that this moves is because some carburetors have a cable adjustment and you run your throttle by cable and that's where it goes in right here but that's not the case with these now that we have this all together I'm going to put the air filter on and start it up okay so we get it all back together let's go ahead and pump this primer just three times just like it's supposed to okay there you have it you see that's up very hard to do and these carburetors are all the same on a lot of these bricks engines that has that style of a carburetor they're all basically put together the same it's really easy to take apart it's really easy to repair I love these problems and I love these carburetors I don't really have too many issues it's always the same thing that's why I'm doing the video it seems like 90% of the time that's going to cure your problem I'm gonna put the link down below for that gasket and that fuel pump diaphragm because you're probably going to need it at some point down the road especially if it's going to be yours but it's a real easy to repair if you liked this video click subscribe or click like and I'll try to get more on just like it I appreciate it thanks

Channel: Foxboss9

Views: 3,250,456

Rating: 4.8327932 out of 5

Keywords: Briggs, quantum, hp, horsepower, lawn mower, push mower, mower, blade, carb, rebuild, repair, fix, no start, start, stall, stalling, run, running, rough, no power, power, loss, idle, rpm, low, low rpm, weedeater, poulan, poulan pro, mastrecraft, craftsman, sears, mtd, yardman, yardpro, kmart, walmart, lowes, home depot, outdoor power, equipment, small engine, e85, fuel, gas, stale, tune, tune up, toro, cub cadet, john deere, ariens, husqvarna, 22, 21, 20, 19, inch, cut, grass, catcher, carburetor, primer, bulb, Lawn

Id: Cpr9b0Qyfds

Length: 15min 41sec (941 seconds)

Published: Sat Aug 09 2014

Reddit Comments

[u/laser_red]

There was one odd thing in there. He was concerned about oil getting into the air filter foam. Every foam air filter of my experience was supposed to have oil in it. I oil my lawn mower filter. Is it not supposed to be?

[u/sticky-bit]

The last two seasons, I could just pour a little Seafoam down the carb throat, let it soak for a half hour, start it up and do the "$1.98 tune-up" and start mowing.

This year, the mower would quit after about 5 minutes. I could restart with a little spray down the throat, but that meant either running without an air filter, or uninstalling the filter and reinstalling it, only to repeat again every five minutes.

In addition, the primer bulb wouldn't pump any longer. I assumed there was a dirty screen on the fuel intake, and I found this video yesterday. Today I rewatched it and cleaned it step by step. There is also a good tip to keep the gasket in place in a critical spot.

After a careful disassembly and reassembly with the same gasket (not recommended, but it worked for me) the primer bulb was fixed and the mower started without the use of an aerosol can of something flammable.

[Shared August 9, 2014] by [Foxboss9], someone I've never seen before. The only criticism I have is cleaning the foam air filter was not covered, but I knew how to do that already.

If you have a small engine with this type of carb, go ahead and bookmark it now, as you will need it sooner or later.