Tecumseh Carburetor Total Rebuild 

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: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-5QGQnJGYPGw.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.

Excellent instructions, top video work. Thank you

Great video, went threw the whole carburetor including the welsh plugs. I like working on these carbs too

Thank you for taking the time to help people out.

The tecumseh service and repair guide video says to use nail polish. You're doing it correctly

Nice video but, it would have been a plus to see it installed and running.

Thank You for information and advice AllWAYS good to learn from the props who do it every day

Great job and step by step guide as always Awesome!!

Nice job! Appreciate you taking the time to really do a well explained video.Thank You!

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

Good info. 👍. Got try myself. No one here works on those.

A small drill press with a stop on the downward travel would be good to drill a hole in the Welch plug.

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. 👍

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.

Yah, I always nail polish my Welch plugs too

Is the snowblower carb different than the yard machine tractor carb?

Are they the same on a toro with Tecumseh engine?

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.

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

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

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?

After 5 min of watching I bought a new carb... pshhh. Just joking. Good thorough instructions.

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.

Whirlbru said the gas will evaporate the nail polish.

What is a good ultrasonic cleaner to buy?

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

That’s not a two stroke