Mower Won't Start Clean New Plastic Style Briggs Carburetors - Troy Bilt MTD Craftsman 550 EX

all right guys so I'm very surprised but apparently there's no videos yet on YouTube on how to clean these newer style Briggs & Stratton carburetors the carburetors I'm referring to are these newer style all plastic ones that are commonly seen on MTD Yard Man troy bilt and some other brands that are pretty much the same thing all owned by the same conglomerate they're actually very simple carbs to work on I'm not really a fan of these this is a broken one that I have off of a mower that I was using for parts to get this one all put back together this is a garbage picked lawnmower when I got ahold of it it was missing the air filter the air filter box and a couple linkages from the carburetor I have since put those back on and reinstalled them I shot some starting fluid into the throat of the carburetor just to see if we had spark and everything seems good to go so far so we'll go ahead and pull the carburetor off of this lawnmower and I'll show you guys how to do that so here we have the side of the lawnmower there's the carburetor and our air filter box so now we'll just go ahead and pull off the beauty cover in order to do that there's three bolts here so we'll go ahead and remove these pull the beauty cover up and off I always just set them on top of the bag just kind of get it out of the way so here we have the lawn mower now on its side the reason I went ahead and did that is so the gas tank is not going to be dumping any more fuel into the carburetor and the two magic sockets that are pretty much every small nut and bolt on here are 9/32 oddly enough and 5/16 so the first thing you want to do is pull the cover here off of your carburetor grab get that out of the way grab your air filter I always put it back in the cover and then you have a total of four bolts here these to hold the carburetor onto the air filter box and then these two are just mounting they just mount it to the side of the motor so the two black ones are 5/16 and then the other two that are on the side of the carburetor two silver ones are nine 9/32 so that's done and now you can see we have full access to the carburetor so now what we're going to have to do is remove this small linkage here and I always just carefully when I remove these I push this part forward and it kind of bends it a little bit you don't want to crease it but if you bend it just slightly it's not going to hurt anything and then I just kind of pull it out like that and bend it back into shape just a little bit then I pull a linkage out from the top and we set it aside so now what you have to do is remove the governor linkage from the back of the carburetor and as you guys can see there's the linkage so it's kind of squirrely getting this thing off but we'll go ahead and remove the fuel line first so now to remove your carburetor you're just going to have to kind of wiggle it back and forth and then you'll see the linkage kind of comes free so you have to move the carburetor around like that and just get it off so now we have the carburetor removed I'll show you guys how to clean one of these out it's very simple anyway so here's overview of some of the tools we're going to be using as you guys can see the carburetors right here you can do all of this with a regular socket and you know ratchet you can use it wrenches you can use brilli whatever the hell you want I like the drill method because it's quick and I'm lazy and you'll need a flat blade screwdriver and you'll need a couple pieces of wire this particular wire I'm using I've been using this stuff for years on lawn mowers but I use this at my day job I'm an aircraft mechanic and basically I was able to procure some of this from work a while back years ago and this is diameter 20,000 safety wires what it's called and this stuff works perfect for working varnish off of the inside of jets on small engine carburetors it's the perfect perfect size because I know some of you some of you guys have probably been into small engine carburetors before and so you know what jets I'm talking about they're just really really small I'm going to drain a little bit of fuel out of the carburetor I guess but these are really easy to get into let's say nine thirty it's a couple 9/32 bolts on the bottom of the bowl so we'll just go ahead and remove these throw those in the mag bowl there these carburetors are not the easiest to take the bowls off of but what I do is I get a flat head screwdriver and kind of just work it in like that sometimes they're not this easy and you just kind of pry it very carefully because there's a big ol ring as you guys can see that goes around it so now we have the bottom of the carburetor you always want to check your float we'll pull that out in a minute but we'll look at the bottom of the bowl here everything looks good everything is nice and clean I'm not really seeing too much of an issue with any of this here now we have the carburetor itself we'll go ahead and remove the bull pen the needle and the seat so in order to do this let's go ahead and pull the pin out with a pair of pliers of course if you're me you shoot it off like that there's the pin set it the mag tray and then let's go ahead and remove your float and needle you always want to look at these floats really well make sure that there's no cracks or dents or dings in them if they've been sitting forever this one's still pretty new so you're more than likely not going to have this issue but when they sit forever and congealed gas and old gas and it really messes with them really messes them up so you always want to check these especially on older lawnmowers and then we have the needle so we look at the top of the needle not seeing any varnish here so I think the needle should be good to go and go ahead and spray it with some carb cleaner anyways and then we have the bottom of the carburetor you have a Welsh plug and then this thing right here it's kind of tricky to get out some of you guys might have an issue pulling these out and it looks daunting at first but what you want to do is you guys can see where the nipple is right here and right here and also right over here there's basically just enough room in the plastic to get a small flat bladed screwdriver in there so what you want to do and again it can be daunting so be careful is just wedge it in and pull it out like that and you guys can see all the Jets and very likely this is where our problem is with this carburetor so I'll show you guys how to clean these out it's very simple now before I clean this out I'm going to go ahead and pry out this small gasket be nice and careful with it so when you go and clean one of these out I kind of like to spray the top a little bit just to kind of get some of the gunk off so it doesn't work its way into the carburetor and then I spray both the both the valves out so I open them up like so just go ahead and shoot a little bit of carb cleaner in this hole right here you can see it comes out of this little spout right here and then go ahead and spray some the other way just a couple squirts is all you really need and then right inside here give it a good quick squirt and I'm putting carb spray each hole as you guys can see it's coming out of the bottom that's good that's exactly what we want there's another small hole up there that was coming out at the top now and then this one here on the side of course it's getting on me but it's coming out of the side there believe it's that one so we'll go ahead and say that one out again and we're good to go with the main part of the carburetor so I'm going to go ahead and set this on the toolbox so we don't get it dirty and then we have this beast right here this is where these newer carburetors are going to fail and so we have these three main jets of the carburetor what you want to do is as you can see right in there there's a little teeny tiny hole that's what this 20,000 s wire is for it's very carefully just hook it in and just move it around back and forth you don't need to do this hard or you know with any force once you're done with that side one right there you have this other small one here at the bottom and these small tiny holes love to gum up with fuel this one I can tell is gummed up you guys can't really see that I apologize I'm going to go ahead and poke her on in there very carefully with a small flat-blade screwdriver I just kind of wedged it under and pushed it up like that with the side of it we should be able to get it off now just want to be very careful with this and it's now all the way off but now you should be able to get some better access into this thing and clean it out some more so I'm just going to go ahead and shoot some carb spray into this thing as you guys can see there is hole three holes on the side of the middle one I'm just going to go ahead and clean this off a little bit we'll stick our nozzle in there clean that one out and always look over these o-rings before you go and reinstall everything so now go ahead and stick this part back on being that it's plastic you want to be really careful not to mess it up just make sure it's down all the way and seated and it appears that it is and I just discovered something really interesting about this carburetor and as you can see there's that little flange in there as probably can't see it all that well but just around the throat there's a flange and basically that has to be lined up so that the center hole is there if it's not there you can't get this back in and it won't seat properly go ahead and make sure that that flange right there is seated flush that way against the carburetor before you do anything so go ahead and sit this in and it's in sure it's nice and tight and I'm happy with that so let's go ahead and reinstall the float and the needle and the pen and we'll go from there so now we'll go ahead and throw the float needle one go ahead and put your needle in the float I always like to aim for the hole before I set it down make sure everything's nice and copacetic there and we'll grab our pin slide that back into place now the Pens back in place so we can go ahead and throw the bowl back on so now we have our bowl and we'll go ahead and reinstall it it's only really one way it can go back on and these two bolts right there are the bolts thread to both those holes so we'll go ahead and throw our back in if you guys notice this bottom part right here our coincides with the nipple you swish it around the other way it doesn't really fit so like I said it can only go on one way but we'll go ahead and throw this down and I'm going to kind of guide it in as far as that o-ring goes and I got it seated it in place so we'll just grab our bolts of my drill set to the number three setting so there you go corporator aside from the gasket has now fully been reassembled so I'll throw the gasket back on and there you have it so now let's go throw it back on the mower and see what happens so now we got the carburetor goes back on just like so right there and that goes right over that part there but first what we're going to need to do is go ahead and reinstall this linkage and to do that you pretty much do the same thing you did when you took it off it's not the easiest there is to get it back on fact I'm going to straighten it out a little bit stick it in like that and then thread it back on making sure right now the carburetor is going on to the motor just fine and it appears that it did for posterity I'm going to go ahead and reconnect the fuel line so now we just have to reinstall the linkage to this little heat sensor here that comes off of the exhaust and I always like to install it onto the carburetor first like so then we reinstall it here move that arm forward give it a little bend bend it on back and now it's been installed so now that all that's done we can finish off with putting the airbox back on that's pretty simple I'm not going to show you guys that on camera I'm gonna go ahead and check the oil I already changed the oil in this thing but we'll go ahead and check it make sure level hasn't changed and we are still good let me go ahead and pull the cord a couple times see if it starts on its own if it doesn't I'll use some starting fluid no I'm definitely happy with that the car Bowl I suspect probably wasn't all the way full and that's why I kind of surged like that so I'm going to keep an eye on that before I go on and sell this to somebody else but typically what I do is I run these things for about twenty or thirty minutes whether I'm you know just letting them sit there with the pair of vice grips on the handle just letting them run or I'm actually using them and you know mowing grass out here I like to let them run for a certain length of time shut them off wait a few minutes come back and start them up again this really solidifies and this really helps me pinpoint if there's any other issues such as with the ignition or the coil or you know anything like that so I'm going to go ahead and throw the air filter box back on and then I'm going to go ahead and take it for a quick mow well so as you guys can see I haven't gotten over there yet but did a pretty decent job I am very happy with how this thing performed now but I hope you guys enjoyed this video it's a pretty simple feat to go through and clean one of these carburetors out I'd even venture to say that they might even be a little easier than cleaning out the old metal ones that Briggs used to make and stay tuned for a future update video on this after I clean it all up and make it look nice again

Channel: Hank's Garage

Views: 528,595

Rating: 4.7950401 out of 5

Keywords: briggs, and, stratton, plastic, carb, carburetor, all, 550 ex, husqvarna, craftsman, mtd, yard machines, yardman, toro, husky, bolens, troy, bilt, fix, repair, how, to, wont, start, lawn, mower, lawnmower

Id: _mfUWBQXk4U

Length: 16min 26sec (986 seconds)

Published: Sun Mar 13 2016