Another very important item to check is the atmospheric pressure vent hole. It is a very small hole that needs to be clean and clear to prevent leaking from the carb upon assembly. You can find a quick video here: th-cam.com/video/5QGQnJGYPGw/w-d-xo.html
well. i have a 2005 lawn-boy 10685 that was running poorly, so in 2022 after reading a bit and watching vids on youtube i thought it would be easier to just buy a aftermarket carb. no. it lasted 1 year before it wouldn't prime or hold idle. found a used carb and purchased the rebuild kit you mentioned; yes, a used carb and kit was 2x the price of the aftermarket carb i purchased. but it doesn't work, so where is the savings? vids like this make it easy to sit at your kitchen table and just go one step at a time, learn something like what parts do what, and fix it. got questions? rewind, review or post in comments.easy peasey. so, in the mean time, i put the original 640350 carb back on after spraying it out with carb spray so i can still use the mower (primer bulb not working, squirt bottle with gas solves that) while i rebuild the other one. so, then i can just swap them when i finish the rebuild and hopefully my rebuild will make it like "new" again. if not, start over and find my error. one more thing; the new kit comes with new needle and hinge spring and it occured to me the old spring can be used to clean out vent holes and such. bend it anyway you need to make it work, it's been replaced so it's now trash, right? but now it can be a specialy tool and be given new use. great video, sir.
It does mention in the Tecumseh Engine Service Manual that nail polish can be used to seal the perimeter of those welch plugs. Very good and to the point carb rebuild video. 👍
Nice video KB. Very good camera work and narration sir! I like the tip with the nail polish and i will be taking that tip and putting it to use in the future. Probably would be a good idea to do that on a carb that you don't even take the plug out but just for a little piece of mind. As a flipper since i retired, i see plenty of clogged and dirty carbs. Thats usually the biggest problems i run into on machines. I always enjoy your videos! 🇺🇸👍Roger
I have a MTD snowblower with a Tecumseh 4.5 engine there are 3 tubes coming out of the carburetor One is for the gas hose,the other one is for the prime r bulb what is the 3rd one for? Please advise.
The needle hinge pin assembly for the float....- does it matter which direction the pin is hung on the float Tabs? I couldn't tell which way you placed it. I'm currently playing around with a 1980s Sears Gamefisher 7.5Hp boat motor. Upon removing the carb and opening The bowl the needle fell out. I had intended to snap a picture but fumbled. It is a tecumseh carb. Thank you.
I smell gas in my garage, checked out my tucumseh and wala I was touching around the bowl My half inch bolt leaking gas ,could it be that little gasket around it?
Nice video not sure how I feel about the nail polish I wonder how it would make servicing it in the future or if the nail polish or if someone used nail polish remover would act on the aluminum. Also I think there's a screen under that plastic 90 fuel inlet that should be part of regular maintenance. Donyboy has covered it alot
Thanks for your feedback. I'm pretty sure the polish would come off with carb cleaner, or you could just scrape it off if you needed to. It is not that thick. As to the fuel screen, that would definitely be an item to check, especially if that carb has been sitting and is really gummed up. However for a simple clean/rebuild I don't feel it would be necessary to remove (therefore having to replace) the elbow just to check it.
@@kbssmallenginerepair2615 I just worry about it getting between the Welch plug and where it sits. I'm sure its probably overshooting and overthinking it and I'm sure carb spray will do the trick it was just a thought. I never heard or saw anything like it being done so I guess next time you go to remove one you'll update us and let us know lol. I double checked donyboys videos and he had it on power more series and they were metal so he was able to grasp it with vice grips and twist and pull it out and reinstall it. He said they don't leak but he was using a loctite sealing compound. It was just a thought and the rest of the carb did look clean but those silly screens are magnets for debris
@@robfahey1349 Fair enough. Thanks for checking up and circling back. I'm always looking for a good way to do things. As long as I don't see it back, and it runs great for the customer, I am a happy camper.
There are a lot of options out there depending on how much you use it, how big you need it etc. I use mine almost daily, and I have the one from Harbor Freight. It is not the nicest, or the largest, but for the price (and with the protection plan) it has worked well for me. It burned up at about 20 months, and I took it in and got a new one with another 2 years on in. Still going strong. I can put 3-4 carburetors and its guts in it.
Thanks Rich! Send all the old ones to me! The cost of a new one is roughly ~$80 and it is an Oregon branded aftermarket as Tecumseh doesn't make it anymore. I have had 50/50 luck with the Oregon one. I would prefer to rebuild the OEM all day!
You did not tell everybody about the atmospheric pressure hole needs to be cleaned out otherwise the carburetor will leak and you’re gonna wonder why it’s leaking
Another very important item to check is the atmospheric pressure vent hole. It is a very small hole that needs to be clean and clear to prevent leaking from the carb upon assembly. You can find a quick video here: th-cam.com/video/5QGQnJGYPGw/w-d-xo.html
well.
i have a 2005 lawn-boy 10685 that was running poorly, so in 2022 after reading a bit and watching vids on youtube i thought it would be easier to just buy a aftermarket carb.
no. it lasted 1 year before it wouldn't prime or hold idle. found a used carb and purchased the rebuild kit you mentioned; yes, a used carb and kit was 2x the price of the aftermarket carb i purchased. but it doesn't work, so where is the savings?
vids like this make it easy to sit at your kitchen table and just go one step at a time, learn something like what parts do what, and fix it. got questions? rewind, review or post in comments.easy peasey.
so, in the mean time, i put the original 640350 carb back on after spraying it out with carb spray so i can still use the mower (primer bulb not working, squirt bottle with gas solves that) while i rebuild the other one. so, then i can just swap them when i finish the rebuild and hopefully my rebuild will make it like "new" again. if not, start over and find my error.
one more thing; the new kit comes with new needle and hinge spring and it occured to me the old spring can be used to clean out vent holes and such.
bend it anyway you need to make it work, it's been replaced so it's now trash, right?
but now it can be a specialy tool and be given new use.
great video, sir.
Thank You for information and advice
AllWAYS good to learn from the props who do it every day
Thank you for taking the time to help people out.
Nice job! Appreciate you taking the time to really do a well explained video.Thank You!
Great video, went threw the whole carburetor including the welsh plugs. I like working on these carbs too
The tecumseh service and repair guide video says to use nail polish. You're doing it correctly
I agree with you
Nail polish
Excellent instructions, top video work. Thank you
It does mention in the Tecumseh Engine Service Manual that nail polish can be used to seal the perimeter of those welch plugs. Very good and to the point carb rebuild video. 👍
Great job and step by step guide as always Awesome!!
Thanks so much T-Bone. Nice feedback from a pro like you is very humbling. Thanks for watching!
@@kbssmallenginerepair2615 Wow Thank you Kyle. YOU are definitely a true PRO my friend.
when you cleaned out the end of the jet does the hole meet up with the other two holes going the other way?
Nice video KB. Very good camera work and narration sir! I like the tip with the nail polish and i will be taking that tip and putting it to use in the future. Probably would be a good idea to do that on a carb that you don't even take the plug out but just for a little piece of mind. As a flipper since i retired, i see plenty of clogged and dirty carbs. Thats usually the biggest problems i run into on machines. I always enjoy your videos! 🇺🇸👍Roger
Thanks Roger, for your kind words. Carbs are something I think we all see on a daily basis with today's fuels. I sure appreciate your support!
I have a MTD snowblower with a Tecumseh 4.5 engine there are 3 tubes coming out of the carburetor
One is for the gas hose,the other one is for the prime r bulb what is the 3rd one for? Please advise.
Is the snowblower carb different than the yard machine tractor carb?
The needle hinge pin assembly for the float....- does it matter which direction the pin is hung on the float
Tabs? I couldn't tell which way you placed it. I'm currently playing around with a 1980s Sears Gamefisher 7.5Hp boat motor.
Upon removing the carb and opening
The bowl the needle fell out. I had intended to snap a picture but fumbled. It is a tecumseh carb.
Thank you.
Good info. 👍. Got try myself. No one here works on those.
Nice video but, it would have been a plus to see it installed and running.
Are they the same on a toro with Tecumseh engine?
A small drill press with a stop on the downward travel would be good to drill a hole in the Welch plug.
Yah, I always nail polish my Welch plugs too
I smell gas in my garage, checked out my tucumseh and wala I was touching around the bowl My half inch bolt leaking gas ,could it be that little gasket around it?
Tried cleaning mine and found I need a new one Do you have a link to a new one? I can’t find one anywhere
Really good video but i think you may need a pop filter or something so we’re not hearing you swallow or breathe into the mic. Just a suggestion
My emulsion tube is made of brass. It doesn't seem to want to push out? It's a Toro snow blower, model number 31677.
The Tecumseh carbs with brass emulsion tubes generally do not come out.
Nice video not sure how I feel about the nail polish I wonder how it would make servicing it in the future or if the nail polish or if someone used nail polish remover would act on the aluminum. Also I think there's a screen under that plastic 90 fuel inlet that should be part of regular maintenance. Donyboy has covered it alot
Thanks for your feedback. I'm pretty sure the polish would come off with carb cleaner, or you could just scrape it off if you needed to. It is not that thick. As to the fuel screen, that would definitely be an item to check, especially if that carb has been sitting and is really gummed up. However for a simple clean/rebuild I don't feel it would be necessary to remove (therefore having to replace) the elbow just to check it.
@@kbssmallenginerepair2615 I just worry about it getting between the Welch plug and where it sits. I'm sure its probably overshooting and overthinking it and I'm sure carb spray will do the trick it was just a thought. I never heard or saw anything like it being done so I guess next time you go to remove one you'll update us and let us know lol. I double checked donyboys videos and he had it on power more series and they were metal so he was able to grasp it with vice grips and twist and pull it out and reinstall it. He said they don't leak but he was using a loctite sealing compound. It was just a thought and the rest of the carb did look clean but those silly screens are magnets for debris
@@robfahey1349 Fair enough. Thanks for checking up and circling back. I'm always looking for a good way to do things. As long as I don't see it back, and it runs great for the customer, I am a happy camper.
Nail polish remover is mostly acetone which is also a major ingredient of carb cleaner. It's not likely to hurt anything.
@@kbssmallenginerepair2615 of course that's good though your always looking to improve things I always try the same as well. All the best to you
A new carb is $15-$18. This is a great video. But would my time be better spent just replacing the carb with a new one?
Not worth your time or your money. When you see a price-point like that it's for a Chinese knockoff that won't work for a season, if at all.
I’ve only replaced one and rebuild several hundreds of them
The cheap carb are a hit and miss
Awesome
Sealing the Welch plug sounds like a good idea, but it may be attacked by gasoline or different fuel treatments. Maybe some loctite would be better.
No nail polish is what you want to use. Gas doesn't effect it
I agree on nail polish
Loctite only works when there is an absence of air. To put it on the outside of the Welch plugs as a sealer it wouldn’t dry.
What is a good ultrasonic cleaner to buy?
There are a lot of options out there depending on how much you use it, how big you need it etc. I use mine almost daily, and I have the one from Harbor Freight. It is not the nicest, or the largest, but for the price (and with the protection plan) it has worked well for me. It burned up at about 20 months, and I took it in and got a new one with another 2 years on in. Still going strong. I can put 3-4 carburetors and its guts in it.
After 5 min of watching I bought a new carb... pshhh. Just joking. Good thorough instructions.
Thanks Rich! Send all the old ones to me! The cost of a new one is roughly ~$80 and it is an Oregon branded aftermarket as Tecumseh doesn't make it anymore. I have had 50/50 luck with the Oregon one. I would prefer to rebuild the OEM all day!
@@kbssmallenginerepair2615 I can say I have only bought one new carb, that was for a mini DR dirt bike 8.99 on eBay.
Dang, I was hoping to score a bucket of gold! lol 😆
Whirlbru said the gas will evaporate the nail polish.
You did not tell everybody about the atmospheric pressure hole needs to be cleaned out otherwise the carburetor will leak and you’re gonna wonder why it’s leaking
Sorry Big Dog, here is a #short explaining that. th-cam.com/video/5QGQnJGYPGw/w-d-xo.html
That’s not a two stroke
And where did I say it was??