Briggs And Stratton 450 E Series Lawnmower Carburettor Service

In this video, I show how to service a Briggs And Stratton 450 E Lawnmower Carburettor Service
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[@MowerMan]

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[@saskiaschuele680]

Thank you so much I fixed my lawn mower through this video and saved myself £36 😊

[@joesouth1537]

My mower sat all winter with old gas in the tank. I changed out the fuel, but still got no start. I just followed along with the video and went through the process of cleaning out my carb. Amazing how simple it was. My mower runs great now. Thanks for the great breakdown!

[@Husqy1000]

This was an absolute pleasure to watch , learning from someone who clearly knows what they’re talking about . I have this mower and have always been too worried about maintaining it further than sharpening the blade and checking the spark plug . Thank you . Subbed .

[@MowerMan]

Thanks much appreciated

[@guyvizard549]

Was gifted this EXACT model mower from a neighbor who moved. All it needs is to be cleaned, and to replace the carburetor, which he already ordered previously, so it came with. (...and obviously, oil and gas...) so thank you for this video! This model actually looks WAY easier than I expected.

[@jblake015]

I found your video very informative & helpful. Before watching your video I had no clue how to fix my mower. Thanks. 👍

[@owdred6314]

Hi I have a B & S 500e that's had a fuel problem for 12 months, I watched your video then did a carb strip down as shown and guess what, it runs as sweet as the day a bought it new. Thanks for sharing your knowledge, much appreciated. 👍

[@johngermaine2124]

Followed this excellent video and successfully resurrected my Craftsman mower in about 30 minutes! Well done!!! Beats buying a new carb!!!😎

[@timwatts9954]

I’ve just bought one of these for £20 as a non runner. This video has helped me enormously as yours always do. Cheers pal!

[@robertfindlay2325]

A thought about a non-starting non-running B&S lawnmower. I recall that crankcase pressure is important in ensuring appropriate fuel supply via carburettor in a number of Briggs and Stratton engines.. That breather from the carbie to the crankcase would act to provide the pressure pulse from crankcase to carbie that enables the fuel to get into the combustion chamber. And another thought; if you leave the lawnmower out in the rain or even fog, expect moisture to get into the petrol tank and then into the float bowl, which will stop the fuel flow. It doesn't take much water to prevent running. Try add a bit of meths to the petrol tank as this may help as water and meths mix as do petrol and meths.

[@TobyChampion]

Thanks for doing this! I've always been scared of taking an engine apart, but this video helped me feel confident enough that I cleaned out my carburettor and my mower started first time. Another pandemic skill learned!

[@MowerMan]

Glad I could help!

[@xxdemogorgonxx7605]

My mower has been running bad for the past 2 years and this was my first time taking a carburetor apart. I was a little nervous but I followed all your steps and put it back together and it started first pull on the first start of the season. The only thing I recommend is at 9:46 I'm not sure if you mentioned it but there is a little metal disk that could fly out when you use compressed air. It flew out and my heart dropped but thankfully I found it. Thanks for the great video.

[@mikepike7063]

Yippee! Petrol tank popped off a treat and the spring was hanging down but intact! Clipped it back on and the mower started no problem! I'll renew the spring when I get the chance , the old one seems fine but to pop off for no obvious reason it must be weaker than it should be.

[@samwheat6553]

HELLO MR. MOWER MAN!!! SALUTE TO YOU FROM DALLAS TEXAS!!! I wanted to let you know I just fixed my lawnmower that would not start for the past month and a half. I couldn't have done it without you. No one gave the step by step information the way YOU did. You sir are AMAZING. Thanks again and God bless.🍺

[@MowerMan]

Right on! Thanks for your kind words!

[@tonboy8518]

Thanks god that this wasn't an American video - very thorough and too the point no waffle (unlike American videos)

[@markmilner2693]

I am probably the most non-mechanically minded person you could meet, yet I followed your instructions and everything worked a treat! Thank you so much. It’s the first engine I’ve ever repaired (but I do know it’s all thanks to you). Liked and subscribed!

[@MowerMan]

Thanks I appreciate that!

[@KenCorish]

This was so useful and within half an hour I had my mower up and running and finished off the lawn. You are a brilliant demonstrator; thank you so much.

[@MowerMan]

Thanks Ken

[@dbcooper692]

I'm half-Irish, I love your accent and so would my mother!!

[@mikepike7063]

Fantastic video! I have reached the point where you lifted the petrol tank off. I noticed the carburettor linkage moves so freely it was hard to imagine it had a function. I am now fairly confident I am going to find a broken spring under the pterol tank and that will be why my motor cut out. Bless you for taking the time to help us amateurs out. I am now equipped to clean the carb should that be necessary. You have cheered me up so thank you.

[@RedBreenie]

Excellent video. I fixed a 450e on a Mountfield HP185 2021 version. It wouldn't start. Now after a good carb clean it starts first pull. Job done. Thanks for the great guide which is so clear 😊

[@MowerMan]

Well done Tony!

[@dannyboy6114]

I've just took mine to bits put it back together it'll fire up then cut out. I have a feeling I didn't clean the carb out properly now after watching this video. I gave it a good spray with carb cleaner but I never knew the middle part of the carb could come out where the main jet is. Thanks for the video. Very helpful.

[@meerkatsimples1]

Fantastic video - never stripped a carburettor down before and found the video to be easy to follow and my mower is running smoothly now - thank you for your help.

[@webeto5902]

As a closeted gay guy who knows nothing about engines - THANK YOU FOR THIS. I managed to fix my moms mower with the help of this tutorial. It works perfectly. 💪

[@MowerMan]

Awesome!

[@joesinakandid528]

May I respectfully suggest that you consider using the compressor to blow off any loose debris much earlier in the process - perhaps as early as just before removing the carb assembly. Using a paper or cloth plug in the air intake should help with blown in internal contamination from the oily grass clippings. when disassembling the float also consider popping loose both sides of the hinge pin - better control.

[@neildavies9864]

I've just followed this guide and have just fixed my erratic idle. Thanks

[@Scorpionwins23]

Very well put together video, too a few watches but I got it all sorted and it's running much better now. I'm tempted to start a lawnmower repair service after this!

[@phoneme52xxx6]

This is very helpful. I have a 450E B&S and it started to hunt revving up and down and it’s barely three years old. Your video has now given me the confidence to get the carb off and Sort it out. It seems a simple enough job if one takes one’s time. Now to get some carb cleaner before I start....many thanks.

[@MowerMan]

Carbs are pretty cheap for these. If it doesn't work get a new one. They can be a bit troublesome

[@SolveEtCoagula93]

Bloody brilliant! I've just spent a few hours looking at some other vids with other B and S engines. All the time thinking, 'That doesn't look anything like mine!' Finally found your page and BINGO - the right engine. Can't believe how the carb goes together. I've got a rough sounding engine so will take it apart (as shown) and see what happens. Above all, thanks, because you've given me the confidence to have a go! Cheers MM

[@lempsmithdelgado3355]

Brilliant video. I sorted out a sputtering rotorvator in a couple of hours. Gloves a definate requirement, with that carb spray, I used washing up gloves and it disintegrated the ends of the fingers.

[@joeslovo7384]

Thanks so much for the detailed effort! Big help......I won't be cleaning the carburetor though as the cost of a replacement plastic carburetor is $7.00. Makes more sense to this non-mechanic old guy! Thanks again

[@richardarden7291]

Hey Mower Man, great video, never serviced a petrol engine/carburettor before, was easy to follow and it got my mower going again, and saved me a repair/service fee.

[@MowerMan]

excellent

[@PULVERIZOR]

You're a great teacher, got mine going this afternoon after watching your vid, thanks mate!

[@barryramsurn6815]

simple to follow. Clear explanation. Very helpful. Thanks for your time.

[@MowerMan]

barry ramsurn Thanks Barry! Much appreciated!

[@jimtaylor431]

Great video. Just cleaned (emery paper) the spark plug and air filter on the mother-in-law's mower and was hoping to find a video in case I needed to get a bit more involved. Amazed at how easy this is to dismantle and the carburettor is so simple! I know now I can take it apart to service it without any fear :) Thanks for a great video.

[@MowerMan]

Thanks for watching Jim

[@IamTheeEgg]

great job with the video i just picked up 4 of these lawn mowers a couple weeks ago from a guy that couldn't get them to work and he sold them to me for 5 dollars each so i said ill take them he even brought them to my house. they are like new and one of them was a big Honda self drive.. i paid 20 USD for the lot, but anyhow i was having the same issue on one of them and needed to see how the carburetor was attached..i knew it would be a simple fix but it was missing the filter cover so I'm having to buy a cover and a filter for the 450E.. which compared to what i paid for all 4 wont be much.. but I'm like you in that aspect of cleaning my mowers before i reattach the carburetors. Briggs & Stratton carburetors are easy to work on even the older ones are simple. they are basically the same they have a float and a jet needle. cleaning them is the key. you really helped me with this one.. thanks for being so concise ..greetings for mount Holly North Carolina..have a great weekend. Going out yard selling again tomorrow morning, and i hope i find some great things to bring home. take care and keep those great informative videos coming out..you helped me big time..Peace !

[@theodoregriffiths3356]

This is so informative. I bought a second hand mower like this and it's been surging. I've tried changing the plug but didn't want to take the carb apart. I shall now be taking my carb apart! Thank you for this video.

[@MowerMan]

Theodore Griffiths Good luck!

[@theodoregriffiths3356]

Mower Man I’ve just finished rebuilding my carb. No noticeable dirt but cleaned everything. It’s now running spot on. Thanks again.

[@kevinmoore5450]

Followed every set of your video cheers mate working like a dream now My lawnmower fired up first time 👍👍👍👍👍👍👍👍

[@MowerMan]

Kevin Moore Glad I could help Kevin!

[@acook955]

Thanks for showing us how to remove the jets on plastic carb and air vent... (I'm familiar with b/s carb metal) helps a lot 😊 lovely video straight to the point 10/10...

[@speybay45]

Great, easy to follow and money saving hints.Mine was a pain this week would not run after starting, thanks

[@XxcfirecraftxX]

I own one of these, have had it for five years, they're definitely a lot easier to service than the old brigs with all the spring linkage, I can get my carb off and have it cleaned out in about 40 minutes. Taking my time ofc.

[@MowerMan]

Thanks for sharing

[@lmostayoutuber]

My lawnmower I was given,wouldn't start, was full of old oil, which I drained and replaced,took out the sparkplug,cleaned it with a bit of fine paper, scrubbed it with an old toothbrush checked for a spark, was sparking ok, put some fresh petrol and it fired up, but it wasnt running very well, the auto valve was opening looking for more fuel,so I stripped the dellorto carb and cleaned it with the toothbrush in fresh petrol, put it back together and its running fine,ticking over nicely, didn't really know what I was doing,but over 35 years ago I taught myself to strip and build two stroke vespa engines,even though I havent touched an engine for 30 years the principles are the same I suppose, they both need a spark, fuel and air

[@adrianedwards3520]

This video is excellent, I followed it to fix my neighbours mower. Thank you!

[@stephengraydog3988]

THANK you for the video, working on one this week, 450e model

[@my2cents645]

Wonderful video. Man shooting you straight. What I love is, I have this engine and have not had to do that yet :) Done it to a plenty others. Because of this video, I will know what sockets to grab before I start the job.

[@deanporter3842]

Nice one, mower runs sweet as a nut now .Thank you.👍👍👍👍👍

[@stillratz]

Thanks for the great video, now got to try and source parts B&S are useless here in NZ.

[@southerncross3638]

Mine would run for a few seconds then quit, following your video right now, I'm in the US, your accent is just like my family in England😅

[@Goldstonestu]

Brilliant Video - really helpful in sorting out my lawnmower.

[@leerunion2623]

Much appreciated video, now i can fix my daughters mower with the exact same engine.

[@mikewm54jl]

Got a McCulloch with the 450e engine I feel happy enough to have a go at this.

[@mikebeeton4982]

Thank you so much, 100% clear how to and fully explained ! WISH ALL THINGS WHERE EXPLAINED BY YOU ! ,AGAIN MANY THANKS

[@MowerMan]

Thanks Mike

[@christophermarx4256]

I believe the oily air filter comes, because when people try to clean the underneath after mowing, the flip the mower carburetor downwards which allows the oil to soak into the air filter. Only flip the mower spark plug downwards or carburettor upwards ;)

[@JuiceBanger1]

Oil is put on the sponge and wrung out so its damp with oil to catch dust etc. What you describe also happens

[@winterishere9828]

Great video! My one's governor spring got distorted and came off today in some undergrowth and I hadn't a clue how it fitted until I saw your video.

[@MrZumi58]

Super Video, das gerade brauche ich, danke, danke 👍👍👍

[@barryslemmings31]

I think I have exactly the same problem. I will give it a go tomorrow and let you know if it works. B

[@ekayderiibotz5866]

Your explanation while servicing the lawn mower awesome...👍👍

[@MowerMan]

Thanks Yimin!

[@robertfindlay2325]

Excellent and encouraging video.

[@reidthompson9865]

Great job, mate. You are really easy to listen to and you know what you are doing. Thanks a lot.

[@petershaver5006]

Thanks man. Your vid saved me 100-200 bucks.

[@MowerMan]

Glad I could help

[@peterfardell9267]

Very nice video BUT - when I removed the white plastic air inlet jet projecting from the side of the carb. I noticed that there was no hole at all in the end to let air in. You said that that this had to have a clear hole in it or the engine would not run. The mower runs but is hunting so I think it is the carb. I wonder if that is a rogue jet which was made without a hole- the plastic moulding with no hole makes it effectively a blank plug. Perhaps a later/earlier design? Thanks again for a great tutorial!

[@simplyrelevant]

Thanks for making this process much easier for me.

[@MowerMan]

You're very welcome!

[@theboilershop1728]

How good was this video? So well explained. Thanks mate, saved me half a days work.

[@syedmaqureshi5590]

Thanks it was brilliant video grate your effort appreciated thanks again it helped me

[@barryestell6324]

Nice video , but I drill that very bottom jet out to .025 with a # 72 drill bit and that will make it run better , more power and start first pull !!

[@venomvenom5059]

Thanks ,,,, handshakes

[@billwatson7115]

Thanks so much for this video, my mower was a pig to starts and once running the engine was "hunting". I followed all the steps in your video and the mower started first pull and is running like a dream, thanks again!

[@MowerMan]

Bill Watson Thats great Bill! Glad to help

[@omaralimujah2475]

Great video and instructions. Thank you

[@Haks123]

Big thanks mate, very helpful !

[@babajela6860]

Thanks, very helpful to know even though I dont do it myself. It is still good to know what happens when I take it for service .

[@joesikes128]

Good video. I just bought an used one yesterday and clean it. I did pretty much what you did except I have not taken the carb apart but will now, thanks to your video. I have one question? I have what looks like an broken tube comeing out of my gas tank. I think it was barbed with a hose going to the air inlet on the barbed piece on the carb. I notice in your video you only had the air inlet piece on the carb. I put an hose going from the piece on the carb to the gas tank. There was no hose on it when I picked it up. Just figured maybe a hose went there. Not sure. Maybe you know and can let me know. I am still looking an parts list for this model. Thanks for any help. Good video.

[@vincentclohessy8404]

Brilliant quality and thorough explanation and guidance. Thanks a million for creating great content.

[@MowerMan]

Vincent Clohessy Thanks! Much appreciated!

[@chrisbaete5842]

This is a really great video and very easy to follow. One question is my mower is now starting and running which is great as it wouldn't start before. Its running a little rough so I am wondering if I have not cleaned something enough or if the old fuel which has been stored in a sealed can might be the cause?

[@kentw3804]

Appreciate the video instruction. Mower running great now.

[@MowerMan]

Glad it helped

[@markbartlett7553]

Excellent video, thanks.

[@davidbabcock1231]

Is there an easy way to make sure that white donut piece goes in with the holes down?? I’m not sure if that’s one of those things that if you aren’t constantly holding it while you are putting the main jet back in that it’s going to move out of alignment. I don’t want to have to fight with it to make sure that piece stays with the holes on the top. Great video

[@0011clem]

Hello Mower Man , we have a very similar mower here in Australia. The million dollar question is ... how do you adjust the idle so it is not reving real high high before it cuts out with the kill switch ? My mower starts easy and revs right out , but the idle is a bit to high . It is a mechanical governor just like the one shown above. we both have throttles , but I think in USa they just have one speed. I do not want to go mucking around streching springs and such until i know what i am doing. cheers

[@joesinakandid528]

G'Day Clem, May I suggest that IF your mower has a throttle adjustment screw that might be a start - otherwise the governor is under suspicion. Unhook the governor linkage and start the engine and see what the default is - full or idle. Cleaning the carby with special attention to the white 3 tower "Cartridge" and it's removable center Emulsion Tube's tiny jets could also be of specific help. If the tiny holes have been roughly "cleaned" with wires or picks in the past they might well have been 'reamed' to an oversized diameter, passing much too much fuel and causing an over rev condition. If so, the internet is a grand source for replacement cartridges (or maybe even an inexpensive entire, new, carby.) Also - thoroughly check out the 'Automatic Choke' system and see if your version has an adjustable idle circuit. I spent a month in Canberra with friends in '20 - excellent time. - Joe - PS - US mowers use the smaller diameter split handle to retract (by cable) the kill switch - no over rev situation kill switch in our models.

[@michaelramming109]

I'd like to see this done with a rebuild kit, because there are some pieces im not sure about.

[@jeffchristianson-ziebell7727]

Awesome video! Thank you friend! Its great knowing now someone on KZbin here actually knows what theyre talking about! Ive my lawn mower back again! Hey funny thing, I found the gas tank on mine here in the US is identical to your petrol tank in the video! 😂HAHAHA (couldnt resist😉...seriously tho thank you! Saved me a LOT)

[@adamgc73]

That was good to watch David looks like a nice mower ....I just advertised 4 mowers for sale on f book market place for sale they haven't been serviced as I don't have the time fingers crossed someone will by them

[@MowerMan]

good luck Adam

[@paulcarter2907]

A very informative video and therefore helpful, BUT..Invest in a tripod please! Oh and I would have blown or vacuumed off the crud before opening carbs and fuel lines..So although some criticism, I found it very helpful..THANK YOU

[@MowerMan]

Thanks for the tip!

[@voiceofreason24]

A little knowledge is a dangerous thing. The white connector isn't an air inlet it is where the pipe would attach for a remote primer. It is often necessary to block them off if the primer on this spec doesn't work well. I have got some blanking plugs sent from B&S for this.

[@MowerMan]

What a lovely comment thanks so much

[@camdoune6020]

Excellent video - thanks. I'll have a go at that.

[@cruzsanchez3647]

Where does that Little white 1/8 in. Hose connector connect too. The carb. Has three hose connections, the top air (black) the lower gas line (black) and the center (White) connector. I think it's a return line but doesn't have a connection anywhere on the gass tank. I have spent hours trying to find out where it goes to.

[@philramsey]

It's a great video, though very sadly not for our model. We have a Gardenline (B&S engine) 575ex (Aldi purchase in 2015). Have you any video recommendations for the carburettor service for this model?

[@ronaldfulton1175]

When reinstalling the bowl....by hand----squeeze it tightly in place....do not use the screws to clamp it together...or you will strip the plastic main body of carb.

[@arfurdaley6399]

As always a great video with intricate easy to understand instructions!! Thanks Is there much difference with the 650e ?

[@MowerMan]

Not sure i've had a 650

[@jimtaylor431]

I finally had the carburettor off mine and stripped and cleaned it as directed. When I reassembled after a minute or two fuel just began pouring out of every hole on the thing so I hastily removed it again and checked.. can only assume the pin / float stuck open? Reassembled again and it just will not start still. A squirt of carb cleaner into the air filter and it fires and runs for a second or two before conking out. Fuel is fresh 95 octane from Shell. Had to resolve that the carburettor must be duff and its not fuelling properly somehow... Ordered a knock off one on Amazon so hoping that will do the job! Maybe the float is stuck closed now?!

[@UpperChesapeakeBaySkiRiders]

Did your new carb work? Mine is doing the same thing, it would run on starting fluid then shut off. I even tore it apart and cleaned just like here. The only thing when I go to prime, you can't feel any fuel being pushed into the carb.

[@jimtaylor431]

​@@UpperChesapeakeBaySkiRidersYep new carb and a quick prime and it fired up immediately. Honestly for the cost of like £18 on Amazon it's worth it vs your time stripping the thing three times and wondering why it still won't work :-)

[@UpperChesapeakeBaySkiRiders]

@@jimtaylor431 I decided to try one last thing. I took the wire from a bread tie and worked it through the main jet. I was using a slightly bigger wire and it wasn't going in the small hole, in which I thought it was. It broke through the gunk, I sprayed cleaner down the jet and it sprayed. Definitely no blockage now. Reassembled and it fired right up. I like to tinker, and I wanted to get this running. these jets on these plastic carbs are smaller then On most carbs so don't be fooled. Now I have to cut grass. Take care.

[@jimtaylor431]

@@UpperChesapeakeBaySkiRiders Yeah I should have tried that.. just ran out of time due to life commitments so had to cut my losses as too just needed to cut the damn grass.. :)

[@tinribs1974]

I have the same mower I’m having trouble starting I prime it pull the Pullcord it tried to go but it don’t start like no fuel

[@petergj2]

Great selection of videos - very informative and easy to follow. I have a Hayter 413H with a B&S 650 Ex Series Eco Plus Engine which has the classic hunting characteristic but only during initial operation - after 3-4 minutes of grass cutting, the engine runs very smoothly. Also the engine is sometimes difficult to restart after emptying the grass box. Are these symptoms of a carb overhaul needing to be done - I did dismantle the carb last year and couldn't find anything wrong but that was before I watched your videos....!!! Appreciate any comments. Keep up the good work making videos.

[@MowerMan]

Thanks a lot!

[@megaflid1]

Thanks for the vid. On the hole in the carb the the pumper bulb lines up with there appears to be a spring, should there be a ball bearing against the spring? The reason I ask is mine is blowing fuel out of the primer bulb when running and it leaks out when it in the garage.

[@TKayCO]

Thanks for the great video legend! Question.. I have the 450. But can only find parts online for the 450e. I’m after a carby rebuild kit and new governor springs. Do you know of the 450e parts will fit my 450? Thanks 🙏🏽

[@shazm6357]

Australia here! Need advice Please. I have the exact mower but in blue and have had nothing but trouble with it. Am elderly female, living alone with zero funds for a new mower or repairman. A few years ago, trying to get the mower to start by accident chopped the tops of my fingers nearly off and they all had to be sewn back on, and since nothing but trouble. As it never starts a bloke told me to put a squirt of fuel down into the carburetor to help it start with the fuel lid off until the mower sparks up. I have done this for years to start the mower but it never has run smoothly (mower is about 3 years old when purchased new). Today when trying to start the mower, the hole damn thing went up in flames when trying to start it. I hosed it down getting water into the fuel tank and possibly the carburetor intake/hole. I bleed the fuel and put new fuel in and tried to start it again and the same thing happened with it going up in flames. QUESTION, if water got into the carburetor how can I fix it myself. Also with that air breather on the side (just above the fuel line), my mower has a small black hose, BUT it also seems to be some kind of switch that will slide left to right (back / forth). What is that about??? Why won't the mower start without much trouble and when running why is it not running smoothly? Quiet curious about the air breather and why it seems to have that switch and don't understand why, for what purpose? Why does my air breather have a black hose but int he video there is none?

[@chalkie247]

We have this exact model but in an effort to help my other half (he’s not been well) I’ve hit a hidden rock and now it won’t turnover. When I pull the pull start the blades turn, spark lead is definitely seated correctly and there’s plenty of fuel. I noticed when I hit the primer button, fuel was coming OUT of the little white air nozzle on the carb, so have I flooded it? Any suggestions on what else I should check? All I’ve done is ADD jobs to his list instead of helping, so want to try to fix it myself if I can. Thank you!

[@saskiaschuele680]

Thanks

[@MowerMan]

Thanks so much

[@andrewred4210]

Hi great video. Quick question. Do you soak the foam air filter in oil? I noticed you cleaned the existing with fuel but didn’t say if you needed to soak in in oil?

[@chrisssmallengines7163]

Good video ,you explain things well , good detail .

[@MowerMan]

Thank you I really appreciate that.

[@EppingForest304]

Very useful 👍

[@brentlyvideo]

Great video. Thanks

[@26bubbles]

Really helpful, I've got a problem with the idle on the same model. When running it peaks and troughs. I've taken the carb off and all looks OK. I might just order a new carb for a tenner. Could it be anything else? I can't see any adjustments anywhere.

[@sureokk]

Watching this to hopefully repair my handmedown and not have to buy a new one