Carburetor Rebuild for Briggs & Stratton 6.75 Quantum
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- Опубликовано: 19 июн 2024
- How to clean, repair, service, and rebuild lawn mower carburetor on a 6.75 Quantum L-Head engine using Briggs & Stratton #498260 Carburetor Overhaul Kit. This carburettor is found on many older lawnmower brands like Craftsman, Troy-Bilt, Cub Cadet, Husqvarna, Toro, Poulan Pro, Yard Machines, and others.
Briggs & Stratton rebuild kit no. 487260: amzn.to/3khpfhS
Tecumseh Carburetor tool no. 670377: amzn.to/3zh2y1h
Briggs Thick bowl gasket no. 796610: amzn.to/3nG34ns
Briggs Thin bowl gasket no. 693891: amzn.to/3hCbCrA
Blue thread locker: amzn.to/398XOjQ
Wireless Tachometer: amzn.to/3sHibiH
Rewind to review, or skip ahead:
00:00 I'm not Leo
00:36 Remove top shroud and air filter
02:32 Remove fuel lines
03:27 Remove carburettor
04:00 Drain old fuel and clean carb exterior
04:59 Disassemble carburetor
07:15 Clean carburetor internal parts
09:47 Remove old gaskets and O-rings
11:26 Replace all seals and gaskets
16:15 Replace needle seat and float needle
18:07 Adjust float height and main jet
19:38 Remove tank and recoil starter
21:30 Re-install carburetor and governor air vane
23:38 Re-install recoil starter shroud
25:35 Re-install oil dipstick and fuel tank
26:33 Re-install fuel lines and air filter
28:42 The money shot and RPM adjustment
The tools I like and use most often:
Magnetic spark plug socket set: amzn.to/3CzmpvO
Tachometer: amzn.to/3sHibiH
Vessel Megadora JIS screwdriver set: amzn.to/363RFqO
Channellock Bent Needle-nose pliers: amzn.to/3I5DbnA
Long 1/4 Quick-connect Torx Driver Bits: amzn.to/3HUNgnm
Spark Tester: amzn.to/3CxW2qi
OTC Leak-down Test Kit: amzn.to/3CyUhJn
Compression Tester: amzn.to/3IWd6sp
Wear your safety glasses, or you'll put your eye out. Try on some gloves. Take off that spark plug boot. Clean your room. Open the windows, those fumes are nasty. Just 'cause I do it, don't think it's the end all, be all solution. There's plenty more ideas out there, I can't take responsibility if you slice off a few fingers after watching my videos. And don't just pour that toxic stuff down the sewer or in the ditch, dispose of waste responsibly. Just be safe, OK?
Follow along with me elsewhere:
/ thelawnmowerlady
the-lawnmower-lady.blogspot.com/
Titles, opening graphics, and music by AbleVFX.
Any links to products are likely affiliate links, and I may earn a small commission from qualifying purchases (Thank You!), with no additional costs to you.
Disclaimer: The content of this video is purely for my entertainment, and is available to you for informational and educational purposes only. It's not substitute advice from small engine mechanics with professional training and certifications, nor does it create any kind of relationship between the The Lawnmower Lady and you. Your situation may be different, and the The Lawnmower Lady makes no warranties, express or implied, as to the fit, accuracy, or applicability of the information shown in this video, and implies no guarantee of results. The Lawnmower Lady and any sponsors of this video are not liable for any damages of personal injury, property damage or loss of any kind that may result from the use or reliance on this video and/or any parts and procedures represented in this video. You are using the information presented in this video solely at your own risk.
#craftsman #lawnmower #briggsandstratton #carburetor #smallenginerepair #DIY 
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If this video helped you, please consider clicking on the THANKS button above 🙌
Here's the complete tune-up on this mower: ruclips.net/video/x4J5t_RBboM/видео.html
I have an almost Identical engine on my mower and I recently just bought A new carb but as a technician I like to fix parts before replace them. I see all the parts you found from the mfg but do you search on their website or is there a place you download the complete parts and assembly documents?
@@Echo3_ I do have access to B&S documentation, but generally I go to some major parts house (partstree, jackssmallengines, repairclinic, etc.) to get diagrams for all manufacturers. From there I look for who has it in stock at the best price point/delivery option. I'm partial to partstree as they have live stock qty on their website. They've never steered my wrong before. Thanks for watching.
@@TheLawnmowerLady awesome thank you so much. I have a mower with this same carb system but it has the primer bubble I replaced the carb and it wouldn`t start, then it started once and died and I noticed that governor choke spring has no tension but when I put something on to create tension still nothing so i`m kinda lost lol. back at it again tonight 😂😂
I have watched dozens of these carb rebuild videos and have been repairing my own equipment and vehicles for some 47 years now and this video gets an A+ for completeness. They may exist but I have yet to see a video that shows the removal of the throttle plate and choke plate AND the replacement of the small foam throttle plate and choke plate gaskets AS PART OF THE MAIN VIDEO. I have subscribed and gave a thumbs up!
Thank you! I hope you stick around. I appreciate you watching. Cheers!
Older video. But still not cost effective. A rebuild kit is just as expensive as an entirely new carburetor. Add in the cost to the "mechanic" to do it, and you could buy and entire new engine, lol.
If doing it yourself, these older metal carbs can be rebuilt up to a certain point, but still easier and less expensive just to purchase a new carb.
I will try to disassemble and clean etc, but if it looks too bad, I just buy a $10 carburetor.
I have never seen a full restoration on a Briggs & Stratton Carburetor before good job
Thanks for watching!
Its amazing seeing a lady doing some mechanical work an not scared of getting dirty love ur videos dont be scared to tackle nothing
God bless you for such a nice video.
You are so kind. I appreciate you watching. Cheers!
Thank you! 65 YOA mechanically inclined female here and I did exactly as you said to my lawn mower and it's running perfectly.
Fantastic!
Not only are your videos informative but your camera angles, lighting and clarity are AWESOME!! Thanks for taking all the time to set it up to grab the best angle to view the job. Had to subscribe because I could actually see what the heck you are doing and learn much. Thank You for a job, well many jobs well done. Your awesome and an excellent teacher.
Thank you Mr Jan ! Comments like yours make it all seem worth it for me to make videos. I'm grateful for your support. Cheers!
Thank you for the detail step-by-step in this video.. I was able to get my mower to run again with simple cleaning of the carburetor .
I'm happy to help. Cheers!
What a great video! Very complete, makes me want to take a second shot at rebuilding that carburetor. Thanks to your video, I think I need to replace that needle seat. That float was sitting funny. Thanks again! You rock! 🤟
I made a post about that here a few weeks ago: ruclips.net/user/postUgkxOuYTVShaUZmzWo_luhVM_Hfy1rgTbxpG Without that Tecumseh tool, you can get the old seat out with a drywall screw. Don't go too deep and damage the sealing surface. And use the back side of a drill bit (I forget the exact size, just find one that fits in the recess with little wiggle room) to re-install the new seat. I appreciate you watching. Cheers!
Excellent tutorial, I formative and clear video. A class act altogether. Thanks!!
Glad it was helpful! I appreciate you watching. Cheers!
love how you mentioned in ur carby kit welch plugs thats what we call em here in Australia were use USA call em freeze plugs all good
Interesting! I've only heard freeze plug on car engines. Thanks for watching. Cheers!
Great video.
You explain everything thoroughly and crystal clear.
Please keep the videos coming
Thank you Mr George for watching. Cheers!
I love your detailed explanations as well as the close up video that shows details!! Great video! Keep them coming!!
You got it Mr Lawrence! Thanks for your support. Cheers!
Thank you & that Tecumseh 670377 Carb Tool is what I needed most.
Glad it helped. Thanks for watching. Cheers!
because of this video I got my pressure washer running briggs 6.75 quantum thankyou very much
Happy to help. Cheers!
Great video Stella! Calm and informative as always - school book exemple🤙 have a great day! Cheers!
Thank you Mr Anders! I appreciate you watching 😀
I'll be excited to watch more of your videos your very informative I'll recommend you to a friend that works on broken lawnmowers
Thanks for watching Mr James. Cheers!
Now that is a fine job there Stella!
Thank you Mr Kyle! I appreciate you watching.
I’ve watched quite a few video and I love the simplicity and no fluff content of these vids. Everyone should take note on how to do videos the right way. Many thanks.
I'm just happy you watch and enjoy my videos. I hope everyone can learn something. All this can be intimidating to some folks. But even today, I helped a nice lady in HD trying to decide which air filter for her mower. I'm happy to help. Thanks for watching.
Many thanks for this - I needed to double check assembly of the carburetor and your video was perfect! Thanks again from a cold, windy UK!
My pleasure. Cheers!
I love these engines. They're easy to work on and they take a BEATING. And they knock FOREVER!
Yep Mr Norge, they are a workhorse for sure. Thanks for watching!
Nice tip about using guitar string to clean passages. Subscribed.
Awesome, thank you!
Thank you for such clear, detailed and easy to follow instructions. You are the best 👌. I'm working on mine now.
Glad it was helpful! I appreciate you watching.
👏 wow what a wonderful job you have done on this video. Impressive
Thank you so much Mr Rooster! 😀
another "big-ole gooden, love your work & videos. Thanks for them all.👍
Many thanks!
Wow! Started with the first pull! Wish my equipment does that🙂
You can do it!
Outstanding video. Thank you so much!
Glad it was helpful! I appreciate you watching. Cheers!
Hey, my kind of chick. Thank you. I have three to fix tomorrow morning. Thank you so much and take care
I do appreciate you watching. Cheers!
Thank you! I worked a lot on Kohler and Harley Davisons but I never work on a Briggs. Great Video!
I appreciate you watching. Cheers!
Such a well done video full of information and advice. great work!
Thanks for your kind words Mr IHG ! I really appreciate your support.
Awesome video… I learned a lot! Thanks and keep ‘em coming!
Thanks Ms Brenda! Will do!
An excellent tutorial that is not only thorough but also confidence building for a neophyte such as myself! Thank you very much!
You're very welcome! You'll get that rock over the hump for sure. Cheers!
Cracking repair and very helpful content stella
Many thanks Mr Ronnie. I appreciate you watching. Cheers!
very good jab thank you very much
Most welcome.
Great carb repair Stella. Your filming makes me want to improve mine.
Thank you for your kind words Mr Bruce! I think of moving my camera around is like just picking up another tool. Not too much extra time involved, but it does create more time editing after the fact.
😊
Great video , The thicker bowl gasket in the Box kits usually go on the carbs from the E-Z start engines like yours there ......Only twice I had to use the thinner ones.....
Thanks for watching M. Cajun! That's good info to know. I just put the thicker ones on the carbs with the taller lip around the bowl. That said, I use far more of the thinner ones. Cheers!
I think I’ve watched this about 5 times already, keep making more videos for Us please 😊
Deal! I'm working on it.
Oh this is perfect cause I know nothing about Carburetor's and having problems with one of my Toro's with a Briggs and Stratton. Oh thank you finally a close up of what your doing cause I have watched so many videos and yours is the best. So very helpful Stella.
Great to hear Mr Bill ! Thanks for watching. Cheers!
@@TheLawnmowerLady Yes thank you so much and your very welcome. Cheers Stella.
You absolutely rock 😍
All the details about the needle seat I was missing.
That's where I am going wrong.
Thank you thank you.♥️
Happy to help. Thanks for watching. Cheers!
The tool is worth buying for sure
@@philliphall5198 It's not the best on Briggs engines, but it can help getting the needle seat started. I use the back side of a drill bit to drive it home. I show that in my most recent video: ruclips.net/video/9l9RCreSkPs/видео.html
I love those quantum engines Stella. One of the best engines built by Briggs. Great video and camera work as always. Leo would be proud of you! Lol. ✌🇺🇸📽🎬Roger
Thanks for watching Mr Roger! I agree that Quantum engine is a workhorse for sure.
Another Great Video, Always well Explained and Detailed Video.. A Pleasure To Watch
So nice of you. Thanks for watching!
Thanks so much for putting this together; I did a rebuild before on our old mower and it didn't go well, the mower went from starving for fuel to leaking gas like a sieve. I eventually got rid of it, then my stepdaughter bought a house - in the shed was yet another Quantum-powered mower with a junked-up carbuerator. Watching your video helped me figure out several places where I had gone wrong the first time that I had no clue about; certainly the instructions that come with the B&S kit are not nearly as helpful as what you have provided. This time I was successful, aside from zinging the choke return spring into the engine.
So happy to help! I appreciate you watching. Cheers!
Super detailed and videoed very well. Thanks for putting time in effort into passing on your knowledge/experience.
My pleasure!
Nice video Ms Lady, step by step with great explanation. :)
Thanks Mr John! I got a curve ball on this one with that air vane, not exactly what I was expecting. I appreciate you watching!
Yes you did, I havent ever had one with that issue but at least the shoulder bolt was still there and the vane intact. That saved you a little trouble. :)
i like your videos. you are right to the point. good work
Glad you like them! I appreciate your support.
Awesome video lady... congratulations on 1k thats awesome. Hope all is well take care & stay safe .
Thank you so much Doc !!
Very nice repair job and explanations along the way. The only recommendation is that you really should have cleaned everything up once you had it disassembled and the shroud off. Thanks again for an informative video.
Thanks for watching!
Great video! Very knowledgeable ! thank you
My pleasure! I appreciate you watching. Cheers!
Excellent, I have one of these in Australia, not called Quantum here but over there USA. very helpful. great work with no bullshit.
I appreciate you watching. Cheers!
@@TheLawnmowerLady EVEN BETTER NOW.
Thank you very very much, I have NEVER worked on a petrol engine before but have followed your excellent teachings to fix my mower that hasn't run for over 8 years. I was brave enough to remove the carby, clean it and refit it correctly, The joy when it started on the first pull.
Thank you Very impressed & learned a lot
Glad it was helpful!
excellent video Stella video footage is awesome well done
Thank you very much Mr Nev! I appreciate you watching. Cheers!
Wow so detailed
Thanks for watching. Cheers!
Very helpful video, thank you 👍
Glad it was helpful!
Great video Stella - and congratulation on reaching 1000 subscribers.
Thank you Mr Claus. I really appreciate that. Cheers!
Great video Stella, you have stepped up you're game on presentation and editing on this one. Great video to watch while drinking my coffee this morning. ☕Informative and well done! 😁👍
Thanks Mr Eagle! I've learnt a lot in this journey, and try to make the next one just a teensy tiny bit better than the last one. Cheers! 😁
@@TheLawnmowerLady You've done a fantastic job! I look forward to helping you celebrate 1000 subs in a few days! :-)
Congratulations again on hitting the big 1000 mark. Good wofk
Thank you! 😊
Hello Stella love you and your videos
I will try to get on your livestream but your time difference is big to me in the 🇬🇧 hopefully see you on micksmowers Saturday
Cheers Mr Vince! I had to work last weekend so hopefully I can watch Sir Mick's this coming Sat. I'm still not decided about regular livestreams for me, but I definitely would try them at an hour that viewers from both sides of the pond could participate. Thanks for watching!
Will do thank you
Excellent…I usually can get my mower to start but it takes a lot of pulls to do it. That’s hard on this older guys post surgical back..I buy the canned fuel so there’s no ethanol..I had to return the mower not long after purchase because of starting problems. The mower is 11 years old…Great video..
Thanks 👍 I appreciate you watching.
Good video everyone has their own way.
I appreciate you watching. Cheers!
Thank you for sharing your knowledge
My pleasure!
Starting this process tomorrow with the same motor. It's a 6.75 190cc on a Yard Machine 20" and about 10 years old. Has started first pull every Spring after sitting for the winter. Yesterday it just lost compression. It'll will start but then dies out after about 3-4 secs. Cleaned the spark plug and air filter and now it will run but just loping along at about 25% power. Going to take the carb apart and see what it looks like. Thanks for posting!
Maybe just cleaning out the passages of the bowl screw will do the trick? Most of the other passages are large enough to not clog up so badly. Thanks for watching.
Hello The Lawnmower Lady Cajun Coinhunter sent me, hope to see more of you :)
Welcome Ms Maria!! Glad you stopped by. Cheers!
Spend all day today working on this exact same more found it in front of a trash can empty the fuel cleaned up the car cleaned out the air filter hold up the police system rusted solid no replacement parts soaked in vinegar put it all back together again spring week from age no part of a laboo used coat hanger to make brace for spring so not so mow the yard saved myself 495 bucks cheapest lawn mower with same equipment
Glad to help! Cheers!
Spell check
I'm not quite sure where you live but our police system is rusted Solid and don't think soaking an officer in vinegar would help because of all the metal they carry?
Nice job, runs nicely. 🛠👍
Thanks 👍
Congrats Stella! At 10:35 PM RUclips has you at exactly 1,000 subscribers! 🎉🏆🎊👍
No, Thank you Mr Roger. 😃
Berry good job love watching the video
Thanks for watching. Cheers!
really good video
She is very helpful
Wish I saw this before trying my self
Happy to help. I appreciate you watching. Cheers!
Great video Stella. I oil the sponges on the plates just old school i think.
That's a good idea Mr Pete! I'm pretty old school too. My hands are usually covered in greasy oil, so I guess they get a little anyways. LOL
Great video !!
Glad you enjoyed it. Thanks for watching Mr BKB !
Great video there
Thanks 👍 Mr D !
Nice video.
Many many thanks
Thanks!
You bet!And a super thanks from me for watching. Cheers!
Well done. very informative, and if there is anything to learn, it is, if yoy don't have everything you need, take it to someone who does. I was going to do mine, but my nephew, who has a small shop, has all the stuff needed.
A suggestion: Don't be so hard on your brushes. If you look at your metal brush, you can see that the tines are all bent. It takes practice (and I still do it wrong) but work with only the tips of the bristles. Once you force it, you are actually working with most of the sides of the tines. Its like running your fingers through your hair with your knuckles.
I appreciate you watching. Cheers!
good job.
Thank you! Cheers!
I love your videos, they are presented very well. Today I will be working on that style carb so thanks a lot.
From a safety point, you might want to reconsider wearing rings when working this type of equipment.
Ha! You're probably right. Thanks for watching. Cheers!
@@TheLawnmowerLady U R up and at it early this morning.
I just went out and put my carb in the cleaner. One I got from harbor freight so I will run it through three or four full cycles.
@@Hear-MeoutTwo2 You got this!
Hi great video very helpful question did exactly what you did in your video along with cleaning gas tank and fuel line mower will run for a while and then cuts out as if not getting gas I'm getting spark gas is flowing I cannot figure it out any suggestions thank you
First time viewer. Great, helpful video. New subscriber. Thanks!
Welcome! Hope you stick around. Cheers!
Pleasure watching Stella
Thank you Mr Gary for watching!
@@TheLawnmowerLady a pleasure very informative x
Great video for all the DIYers, sent you an email for sticker swap and congrats on being monetised within a short number more subscribers. The OLD MAN at EP over and out!
Awesome Mr Wayne, thank you for your support! Cheers! Check your email
I forgot to say, glad you mentioned your email here. It got filtered to myspam box, I realize now I need to check my spambox more often. Cheers!
I have a 2010 Toro Recycler(identical mower)with the same engine that is referred to as Ready Start. It has an auto choke that is activated by air movement of the fins on the flywheel. When motor won’t start on the 1st or 2nd pull, the main jet in the bottom of the bowl is likely to be stopped up or the governor vane is not moving freely.
good info i enjoyed the video
Thanks for watching Mr Edward. Cheers!
Good job,keep the videos coming,I subbed ya,you are alot calmer than me, I usually end up cussing and everything lol,it's still fun working on them tho,thank you so much for the videos
I appreciate that Mr Nate! I've been told I cuss like a sailor more than once. LOL
First pull , your good !👍
Thanks 😁 Mr Bill! I appreciate your support. Cheers!
I love your video. I removed my carb and did all the cleaning. I really really really need a new red needle seat for my carb. My mower is just like this one. I sure don;t want to buy a whole kit. Got any ideas? My mower still cuts out after running for about 5 minutes. Maybe I need a new magneto.
Glad it was helpful! Next time the mower stops after 5 min, pop off the fuel cap. If you hear a whooshing sound, you might have a bad fuel cap (the vent is blocked) It should start right back up. Buy a new cap. If not check for spark. Hard starting when hot is a sign of a failing ignition coil. I've seen replacement needle seats in large quantities (likely from overseas) both on ebay and AMZN. I can't vouch for the quality, but worth a try. I appreciate you watching!
Great video. Where can I find the rear wheel height adjusters, mine broke. Thanks for what you do! I’m a fan.
If you can't find then at the major parts houses (partstree, jacks, repairclinic, etc), I've had good luck on ebay. I appreciate you watching. Cheers!
Hi
Thanks for the detailed info on this video.
My lawnmower is craftsman 6.75 21” mulcher
from sears..
i changed oil, gas and soark plug..
the engine wont start.. but i one thing i noticed is if you keep priming it would nick start for just few seconds and die.. would you be able to help please!
Definitely a fuel delivery issue. Clean the carb like in this video, you'll probably be good to go. Thanks for watching.
Congratulations Stella my wife is your 1000th sub
Thank you Mr & Mrs Rooster! All y’all are the best!
Your video is amazing and helped me get my mower running again. Quick question though, is the center jet removable at all for a more thorough cleaning?
Not on most of those models. I appreciate you watching. Cheers!
Great Video. Thanks for taking the time and being so thorough. I have the same carb, but without the choke/governor plate. I noticed that you only used the "O-Ring", but the gasket on the mating surface to the engine. There is one that came with the kit (498260). Do I not need that gasket with this application?
Lots of different models out there, so I can't be too specific... Only replace what you remove. Most of those kits include extra items to cover multiple different carb models. That said, if the fiddle faeries have been in there before you got this mower, it's hard to tell.
very nice vid
Many many thanks
Thank you for the video. Last week I did everything you did, even put in a new spark plug, it didn’t start. Put back the old plug and it started and mowed my lawn. Today it didn’t want to start. Any suggestions??
Hard to diagnose online. Obviously go over what you did or changed, maybe a disconnected spring, then start with the basics. Make sure you have good spark, good fuel flow. I appreciate you watching.
Lawnmower Lady - Love your videos, straight and to the point. I noticed its cheaper to buy a brand-new aftermarket Carburetor than buying the rebuild kit. In fact, they package an air filter, spark plug all the gaskets fuel filters etc for less than the rebuild kit. Curious what your thoughts are on the aftermarket Carburetors. Thanks!
I think those aftermarket kits have their place. I personally steer clear, I've seen too many reports of hit/miss quality. I can confirm the spark plugs are usually fit for the bin. I'm also of the mind to try and keep as much out of the landfill as possible. That often means clean and work with what I have, rather than replace. I appreciate you watching. Cheers!
Great channel, awesome video. Would you mind reviewing which (diameter, length, thread count) bolt goes where?
I'd removed the plastic shroud held in with screws, then the fuel tank assembly. Then unbolted the metal top covering. After that I'd also removed the air filter and bolts holding the breather box to the carb.
So yeah, I have this model in a few pieces and am missing a few bolts. Or have some in the wrong spot.😅
I would go to any major parts house (partstree, jackssmallengines, repairclinic, etc.) to look at the specific diagram for your engine model #. Should be stamped on a flat metal plate peeking out from under the plastic shroud, covering the muffler.
Hiya! I just picked up a Massey Ferguson 2107 ride on needing some TLC but it runs fine, same engine as this video apart from it says 65 on it so I’m unsure as to if it’s 6.5 Hp or what?? Good video though as I’m gonna keep it & this gave me a bit of insight into it, that heat induction automatic choke thingy is an interesting gizmo I’ve never seen that before but if it works it works, I don’t really do a lot of small engine work it’s mainly my own stuff I fettle & service so cheers for this video, I heard you say something about not enough views on a live recently so I just hit play all earlier on the TV when I went out so the dogs been watching you for a couple of hours now lol, every little helps! Cheers 👍
Thanks for watching Mr Mikey. Good luck on that machine you are working on.
Thank you for your tutorial. I was having an issue with my mower where it would start but then not idle and die. After removing the bolt on the bottom of the carburetor found that there was nothing passing through the holes in the bolt. Complete clog. Thanks again.
I appreciate you watching. Glad you got it sorted out. Cheers!
Very very good
From wampler small engine
I appreciate you watching!
That's my mower engine. I live in gas-mower-banned California. It has to last me, who gets it after I pass, and who gets it after them forever. I intend to reclaim it at my resurrection!
Haha! I tell everyone on the other coast to hang on to those old mowers. They sure don't make them like they used to. Thanks for watching!
This is the exact type of mower I'm working on myself. I cleaned the csrb in the ultrasonic cleaner and now the carb is leaking fuel. Is that because the needle isn't seating in the carb?
That's most likely. Either a bit of grit in the needle seat, or perhaps the needle tip is damaged. You might try a Q-tip in a small drill to polish the insides where the needle travels. Might be some oxidation that keeps the needle from moving freely. Get out that magnifying glass to make sure no cotton fibers get left in there, if you went real deep. One tiny cotton strand will keep that needle up, causing flooding too. Good luck
I’ve been using 222 lock tight on the butterfly screws just to be safe and secure it’s not going into engine
I don't know how the peen those screws, but I don't won't them to back out.