Briggs & Stratton Pulsa Jet Carburetor Service & Repair! (EASY DIY TUTORIAL)

[@VintageEngineRepairs]

If this video helped you, please consider clicking on the THANKS button above to support my channel 🙌

[@cusoonmyfriend3738]

i subbed and thank you, tho i wanted to ask you if it was a carb for 4 HP briggs, cuz it looks the same as one i m trying to rebuild, it was on rotottiler ariens rt 424 , it does have an HP 100292 0507 01 on it but cannot find S.. on internet, thank you

[@iancameron198]

Where can I find these carb brake downs.showing the break down of carbs.

[@jimhobson9268]

Good video, great explanation. Never before understood how the PulsaJet worked. Thanks.

[@VintageEngineRepairs]

Thank you! Glad you enjoyed it!!

[@stevevize8300]

By far the best video on these carbs.

[@VintageEngineRepairs]

Thank you :)

[@clintstevenson1214]

Those carbs are pretty bulletproof. Thanks for a wonderful video! Looking forward to the next one :-)

[@VintageEngineRepairs]

Thank you for the kind words!!

[@NeelsvanVuuren-s7m]

Very good explanation, thank you. I have two pulsa jets to try and fix. Greetings from South Africa.

[@VintageEngineRepairs]

Awesome! Best of luck :)

[@RiteTrade]

Wow, brilliant explanation for me who don't know the first thing about carburators. The best "how to" video I have ever found. Thank you so much!

[@VintageEngineRepairs]

Thank you!! I really appreciate it :)

[@a.j.baylon8193]

Thanks!

[@VintageEngineRepairs]

Thank you very much for the super thanks!! So pleased you enjoyed the video :)

[@a.j.baylon8193]

This is exactly what I was looking for. It has saved me a lot of time and effort. Thank you!

[@VintageEngineRepairs]

I’m so pleased it’s helped! Thank you for The super thanks once again!! It always makes my day :)

[@Big_Johns]

Nice demonstration Tom, it's good to have this for future reference. 🙂👍

[@VintageEngineRepairs]

You’re always so kind John haha thanks mate :)

[@Big_Johns]

Anytime brother, just call it like I see it. 👍

[@VintageEngineRepairs]

@@Big_Johns thank you mate :)

[@thebrucester88]

Outstanding explanation, thanks!

[@VintageEngineRepairs]

You’re welcome! :)

[@2alawabidingcitzen]

Definitely appreciate you for this video the only one on KZbin..❤❤❤❤❤❤ i just brought my son an f1 kart with this engine thats been sitting awhile and was trying to figure out how it works.

[@VintageEngineRepairs]

Awesome glad you enjoyed it :)

[@iancameron198]

​@@VintageEngineRepairs we're can I buy these older carbs rebuild kits

[@johndn9238]

Excellent - a really clear and effective video; thank you.

[@VintageEngineRepairs]

You’re welcome :)

[@tinkeringtaylor3053]

Hi Tom, Excellent video, well explained 👌👌👍👍

[@VintageEngineRepairs]

Thanks Nev!

[@HobbyMotorDK]

Good one Tom 👍👍

[@VintageEngineRepairs]

Thank you Claus! :)

[@waynestefinashen239]

Well explained and well done video Tom. I have heard these fuel tanks may no longer available so if true hold on to any you can find.

[@VintageEngineRepairs]

Thanks Wayne, good to know :)

[@Videoswithsoarin]

thanks! mine would only fire if i sprayed down the carb (just rebuilt the engine) im pretty good with repairing carburetors but ive never worked on one with a diaphram, now i know what a bad one looks like and thats exactly how mine looked! ordered one just now

[@VintageEngineRepairs]

Glad it helped! :)

[@jlynch916]

Can you post the link of where you got the manual to adjust the carburetor?

[@VintageEngineRepairs]

It would have just been a google search

[@NITSIRK690]

where abouts on the linkage arms should the throttle cable be attached? thanks

[@VintageEngineRepairs]

I’m afraid I can’t remember, it was such a long time ago!

[@bigbadhag]

Good luck on those!

[@RiteTrade]

Still looking for throttle cable connection. I took a photo yesterday before I stripped. Sorry don't know how to put it up here. Can mail.

[@darwinwilde6973]

By far the best! Question - my brass pick up tube ends in a knob, no filter. I see a filter part listed but not available. Use as is or fashion an in-tank filter. Not sure if the mechanics will allow that approach. By the way, while cleaning the rust from my tank, I pulled up one of the shorter tubes. Maybe dropped in assembly? Thanks again.

[@VintageEngineRepairs]

Yes that hex head should have a filter in it :) thanks for the kind words!

[@darwinwilde6973]

@@VintageEngineRepairs does it have to be a sealed system to draw gas? I have a small in-tank filter that I could connect to the brass tube with plastic hose but don’t think it will always be entirely submerged. Also found a Briggs tube that includes a filter that looks like it could be grafted onto the brass tube. I know the second option will work but I’ll save the $10 for the part and try the in-tank first if you think it might work. Thanks

[@darwinwilde6973]

@@VintageEngineRepairs Light went on! Never mind. Thanks.

[@jc-d6179]

Very good!

[@VintageEngineRepairs]

Thanks .)

[@amandeepkang4422]

What are the two pinholes located behind the jet screw?

[@VintageEngineRepairs]

It’s been a long time since I looked inside, I believe one is fuel in and the other is fuel out, but don’t quote me!

[@amandeepkang4422]

@@VintageEngineRepairs I thought to look at it from where you can remove the valve and the small hole is for drawing gas during idle, and the larger hole is exposed when you open the butterfly like a secondary.

[@graeme1744]

Did you do a video on putting the carb back on the motor. The spring is what I need help with.

[@VintageEngineRepairs]

I don’t I’m afraid! Each carburetor linkage setup can vary quite a bit depending on what machine it’s come off. I suggest searching for the service manual for your particular engine :)

[@BrockMurphy-i4k]

How did you clean those mesh filters on the tubes?

[@VintageEngineRepairs]

I use carb cleaner and compressed air :)

[@philliphall5198]

Hard to find the pickup tubes now Any place to get them ???

[@VintageEngineRepairs]

Use some brass tubing, epoxy them in place :)

[@kargo27]

Thank you. I replaced the diaphragm and the passages "looked" to be clog free but I didn't check the main jet and the engine is "hunting" (surging) and I have to run it with the choke halfway closed. I'll take it off again and be more thorough. Great tips!

[@VintageEngineRepairs]

Doesn’t hurt to go over it again :)

[@kargo27]

@@VintageEngineRepairs gonna do that this weekend, lol. :)

[@kargo27]

@@VintageEngineRepairs went over it again, this time cleaning out all passages again AND main jet. Problem solved. I'm a little disappointed in myself because I usually am more thorough than I was this first time around.

[@edsjenk6150]

Great rebuild explanation. How high should the spring/retainer behind the diaphragm sit a above the carb body and is it ok to stretch the spring to achieve the desired height? Thank you

[@VintageEngineRepairs]

Hey :) I don’t recommend stretching the spring, it’s precisely made to ensure if offers the correct amount of resistance.

[@vishes.1128]

good work mate are you based in adelaide?

[@VintageEngineRepairs]

Perth mate :) you?

[@MR_IC]

What exactly is that twisted piece of metal in the throat of the carburetor supposed to do? Does the engine need it in order to run?

[@VintageEngineRepairs]

I’m not sure!

[@alexandercarr-swain5680]

hi, whats the screw head below the main jet, i can't see it reference in the part diagram, i tried to remove it and completely went through it, i have no drilled this out, what is its purpose or can i replace it thanks

[@VintageEngineRepairs]

Hey! I presume you’re referring to possibly the idle screw? Do you have a time stamp for me to look at the video?

[@alexandercarr-swain5680]

@@VintageEngineRepairs thanks for your reply! 01:21 when you unscrew the main jet there is also a Philips head underneath that i tried undoing unless that was purely design

[@VintageEngineRepairs]

@alexandercarr-swain5680 sorry mate I don’t see a Philips under the main jet?

[@JACKHAMMER82A1]

My carb pumps from tank to bowl and then floods carb any idea why it wont spray into the engine I cleaned the carb with carb cleaner and every hole is clean and clear . Any info woukd be appreciated thanks

[@VintageEngineRepairs]

Hmm interesting, when you say floods the carb, how can you tell? What are the signs and symptoms? It could be an engine timing issue blowing air back through the intake?

[@JACKHAMMER82A1]

The air filter tray is off and can see fuel puddle in carb, i was thinking might be timing or valve clearance issue. Want try easier way first. Any chance might be the needle jet bot set properly or governor rod not working. I fix my own stuff and not a professional I thank you for responding

[@galugedinithgamage309]

i have the exact same carb, did a full rebuild and cleaned out the whole thing. now the carb is sending too much gas to the engine. any ideas?

[@VintageEngineRepairs]

Try adjusting the screws :)

[@jaylockard8971]

I have this carb on an older 5hp Briggs. It runs, but I can't get the diaphragm cover to stop leaking. Thought at first it was the new Chinese diaphragm I had installed, so got an OEM Briggs one which didn't leak as bad, but still leaking. Next took the diaphragm cover off and found it was slightly warped (probably from muffler heat), so sanded it smooth with sandpaper on a piece of glass and got it flat. Still leaks and don't know where to go next???

[@VintageEngineRepairs]

Hey, flatten both sides :) why they never used a gasket on them I don’t know, but that said, none of mine have leaked so it does work I guess!

[@louhudon]

I have one of these carbs which I cleaned up but after sitting for a couple days it will not start unless I prime it with some carb cleaner? Once started it restarts great all day long. Any ideas on what I missed??

[@VintageEngineRepairs]

Hey :) And you’re putting the choke on correct?

[@louhudon]

@@VintageEngineRepairs yes I did

[@VintageEngineRepairs]

@louhudon gotcha, you can try give it more fuel, or you may have an air leak somewhere.

[@pauljanssen7594]

The main reason why Briggs & Stratton made the pulse carburetor, was as the fuel tank gets low on fuel it leans out the engine. So this was a great sick so the engine would run at the same amount of fuel no matter how much she was in the bigger tank that pump the gas into little bowl that had inside the big tank.

[@VintageEngineRepairs]

They’re a great concept :) simple and reliable!

[@stihl3826]

Very useful vid but why brake cleaner and not carb cleaner?

[@VintageEngineRepairs]

You can do :) generally I decide depending on the condition of the carb. Just be careful with carb cleaner on o-rings and rubber parts!

[@stihl3826]

Guessing I have an older carb but no jet seems to be either removable or shown on part diagram, only the screw and spring. Have you come across one of these before? Tried to upload a pic but KZbin won’t allow.

[@VintageEngineRepairs]

Yes :) not all main jets or emulsion tubes are removable!

[@Davejust451]

Great video. 11-5-24 TUE

[@VintageEngineRepairs]

Thanks :)

[@hadleymanmusic]

Ive a used mtd 5 tiller. It came with a 5ank full of rust water( they sid it runs strong) shit you better be strong to pull on it forever and never start it. Ive bought a new carb just havent exchanged it yet. I need a tank too but not for 300$

[@VintageEngineRepairs]

Ouch!!! $300??

[@Randpage]

I've yet to play with one of these carbs. What kind of machine did they come on? Fascinating.

[@VintageEngineRepairs]

These were very common on Briggs flathead engines from 70’s - 90’s era :)

[@eddymumford4086]

you can use crazy glue to seal it gas won't dissolve it

[@VintageEngineRepairs]

Thanks for sharing 👍