1974 Briggs & Stratton 3HP Motor Restoration [Part 1 and 2]
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- Опубліковано 5 вер 2024
- If you have already seen part 1 or 2 skip this video. This is for new viewers who did not see part 1 or 2.
A while ago I found two of these motors at my local recycling yard. I brought them home and thought they would make great restoration videos for you guys. This one I will keep its original white color, the other motor I will restore at a later time and it will be made black.
This motor was made in 1974 according to its serial number and has a 6 to 1 reduction gearbox. I suspect this was on a lawnmower or maybe some kind of equipment (duh)
I hope you enjoy the video.
If you have any suggestions for improvement, or compliments share them below!
Please leave a like if you did like the video, please subscribe and feel free to comment your thoughts and as always thank you for watching.
Link for becoming a channel member. (less than 2 dollars)
/ @ajrestoration
Some history on the Briggs & Stratton company.
Launched in 1908 in Milwaukee, Wisconsin, the company is based today in Wauwatosa, Wisconsin. Briggs & Stratton engines are commonly used on lawnmowers, as well as pressure washers, electrical generators, go-karts, and a wide variety of other applications. Their original cast-iron engines were known for their durability, but the company's success was established following the development of lightweight aluminum engines in 1953. The aluminum engine was the perfect solution for the recently invented rotary lawnmower due to its lighter weight and lower cost.
The company started in 1908 as an informal partnership between Stephen Foster Briggs and Harold M. Stratton. S.F. Briggs was born in Watertown, South Dakota, and graduated from South Dakota State College ((SDSC) now South Dakota State University) in Brookings in 1907. The idea for his first product came from an upper-level engineering class project at SDSC. This first product was a six-cylinder, two-cycle engine, which Stephen Foster Briggs developed during his engineering courses at South Dakota State. After his graduation, he was eager to produce his engine and enter the rapidly expanding automobile industry. Bill Juneau, a coach at South Dakota State, knew of Briggs' ambition and the entrepreneurial interests of Harold M. Stratton, a successful grain merchant who had a farm next to Juneau's farm, so he introduced the two. In 1922, their fledgling company set a record in the automotive industry, selling the Briggs & Stratton Flyer (the "Red Bug") at record low prices of US$125-$150.
Eventually, Briggs and Stratton settled on manufacturing automotive components and small gasoline engines. Briggs purchased an engine patent from A.O. Smith Company and began powering early washing machines and reel mowers as well as many other types of equipment. The company went public on the New York Stock Exchange in 1928.
During World War II, Briggs & Stratton produced generators for the war effort. Some pre-war engines were made with aluminum, which helped the company develop its expertise in using this material. This development, along with the post-war growth of 1950s suburbs (and lawns), helped secure Briggs & Stratton's successful growth throughout the 1950s and 1960s.
Stephen Briggs went on to purchase Evinrude and Johnson Outboards and start the Outboard Marine Corporation. Frederick P. Stratton Sr. (the son of Harold Stratton) served as Chairman of Briggs & Stratton until his death in 1962 (Harold also died that year). Frederick P. Stratton Jr. served as Chairman until his retirement in 2001.
In 1995, Briggs & Stratton sold the automotive component business. The resulting company is Strattec Security Corporation.
In 2000, the company acquired its consumer generator business from the Beacon Group and formed Briggs & Stratton Power Products. The Beacon Group had previously purchased the Consumer Products Division of Generac Corporation (now Generac Power Systems) in 1998. In 2005, the company added Simplicity Manufacturing Inc, and Snapper, Inc, to the Briggs & Stratton Power Products line. Murray, Inc, one of its largest customers, collapsed owing to the company's $40 million, and to minimize the loss Briggs & Stratton purchased the name, marketing rights, and product designs of that company. In 2008, Briggs & Stratton announced it would be acquiring the Victa Lawn Care business from GUD Holdings Limited Australia for A$23 million.
In 2019, Briggs & Stratton announced they would be closing their engine factory in Murray, Kentucky with production being moved to their Poplar Bluff, Missouri facility.
On July 20, 2020, Briggs & Stratton filed for Chapter 11 bankruptcy. KPS Capital Partners would purchase a majority of the company stake for $550 Million.
On September 22, 2020, KPS Capital Partners closed on the acquisition of Briggs and Stratton. This sale waives the $900 million that Briggs owed going into bankruptcy.
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I have a '77 Briggs that has a slightly different fuel tank but it's essentially the same exact engine as this one. Actually in the process of making a see-thru cylinder head for it and got rid of the points system all together because it too far gone to be saved...have a video of it shooting flames lol. Anyways these old Briggs engines are cool to play with, love the simplicity of them.
Tengo q reconocer aparte d ser un excelente 👌 mecánico eres limpio como los chorros d ORO ,, gracias 🙂..
I remember these engines as a kid
Using the old gaskets I would have used Stag paste (Red Paste ) for a better seal. Just my opinion. :)
Another classic Briggs and stratton engine saved from the scrap yard 👍😎
Yes indeed!
@@AJRestoration cool 😎
I heard a Hadeda in the background and instantly knew you were in South Africa! Lol, such a distinctive bird call.
Hahaha yes you cannot mistake those bird's call!
@19m01s the 'cone washer' in your
Left hand goes on the bottom of
the spring with the valve-end
slid into the hole... this puts
pressure on the intake valve to
pull the valve into its seat for
compression&power strokes. Else,
your intake valve is left bobbing
around... it will let your
compression blow back into the
carburator... AND burning gases
will/can get back to the Carb !
*Same little 'cone washer' for the
exhaust valve to hold it Closed
during intake/compress strokes.
Quick check: remove the Spark Plug
& put some oil on your index finger,
then press on the Plug hole while
Helper pulls the starter rope
(not gently, but not so hard as
trying to start! to check for compression)
I forget the PSI, but good pressure
will blow past your finger easily.
* @34m50sec IntakeSpring and
@34m58sec ExhaustSpring is
just placed in there and the
valve dropped inside the spring
coil... *! No Cone washer !* ...
each spring must exert pressure
on its valve to hold it closed !
When the cam gear high-spot pushes
the Lifter - it is working against
the spring to open it Just for the
Intake/Exhaust cycle.
You have No connection
that controls your valves...
they are loose.
Wish you had live chat going so we can chit chat live while watching.
I am planning a live video some time in the future when I have my new shed up and going.
The cylider's head shall be tightened from center to the edges, not vice versa :) Good luck and thanks for the video!
Thanks for the tip!
Sweet paint job! Not sure of doing all this and not checking tolerances (ring gap, con rod ID. crank journals, upper/lower bearing ID, etc) though, unless you just want a nice shelf piece. As for the carb, if gas is getting to the upper bowl, the diaphragm is fine, that's all it does. Behind the (mixture needle) jet are 2 or 3 tiny passages that will clog preventing fuel from getting pulled up from the upper bowl. Also make sure the smaller pick up tube is sealed tight in the carb and has no cracks/splits. The gasket in between carb and tank is critical for proper seal for the carb to be able to produce vacuum to pull up fuel as well. Another issue I've found is people not backing out the mixture screw before tightening the nut jamming the tip of the needle into the jet, ruining both. Lastly, I've had issues with China carb kits. I stopped using the needle, jet, and diaphragm/spring/cup out of these and went back to OEM or Stens when OEM isn't available. Made a world of difference for me. Didn't mean to turn this into an essay. Hope this is of some help and you get her running right.
Good job. Those little B&S engines are fun to work on.
Yes they are
The painted/clear coated magneto could be a problem
The missing link I came to see...:D Let me know the measurements for that air governor- and choke rod if you make this run someday.
A question i have always had, how do you keep track of what parts go where when disassembling so that you are able to assemble them correctly
I normally use the footage of the disassembly to backtrack if I can't figure out how and where. After a few of these restorations, you get a feeling of where every part goes.
Ottimo lavoro fratello, complimenti.
Amazing my friend!🙏👍14
Big thanks
thanks for sharing..how to restore
Amazing job, turned out like new. Looks to be the same or at least similar to the engine on my resurrected Morrison Olympic reel mower, after reading the text at the end I'm glad to hear I'm not the only only one who has issues starting with this type of carb... mine always needs a little gas straight down its throat for a cold.
To be honest, I hate these diaphragm carbs. I seem to never get them right. Even with a brand new diaphragm it still wont work. It sucks gas up from the tank, but it does not pass through the carb. All the passages are clean, I checked like 13 times. Its as if those little flaps on the diaphragm does not do its job. I just gave up eventually. It starts right up if I gave it some gas through the filter, but dies as soon as it is used.
Where did the gaskets go? .. They help to create clearance for the oil for the support bearing for the crank. Became very nice that engine, like new :)
12:49 The fluted key is better for strength, is my opinion☝️
Wow she turned out great. My favorite part was you lapping the valves. I did so many years ago and I hated it but watching you do it now was very relaxing. Glad you got it finished. You did a top job 👍
Awesome! Thank you!
Good morning from Southeast South Dakota
Looks Awesome! Love those old Briggs motors!😁
We dont want separate videos if you are going to do this regardless
Sometimes these projects just take too much time, and I have a weekly upload schedule. So if it takes longer than a week, it gets split.
That was a massive job and well done.
Hace unos dos meses repare uno así aquí en Mérida Yucatán México saludos !
Great video, keep them coming!!
Lovely restoration, try and keep the original stickers in future projects they have so much charm even tho they look a bit tattered. Digital print is not the same as old litho printing.
It is nearly impossible to save the old stickers when sandblasting or even when using paint strippers.
@@AJRestoration It can be difficult but a good solution is to use a heat gun and a blade the heat gun softens the glue and comes off a lot easier. Easier said than done and I’m sure you’ve tried. But always worth a go
Is it even necessary buying expensive oils for small engines? All these rebuilds, the internals are so clean.
Expensive oils? no as long as the oils are in spec you are good to go. SAE 30 for almost all these small engines.
انا اتابعك من فترة أتمنى لك التوفيق
Really 😎 cool.
Question: Was any surface prep done between sand blasting and powder coating?
Yep, can't go wrong with a Briggs. Those engines are tough machines, and easy to work on and service. I probably went through about 5 different B&S engines on my first go cart back when I was a kid. Trying to determine which one my father and I seemed to be more powerful and faster. Modified a couple of 3 and 5 horsepower variants. Turned out, a 6 HP was the best at all around torque and speed.
Valeu meu querido! Ficou muito bom 👍
My first go-kart had this engine it last a long time two years running till I have to replace for a bigger and powerful engine
I just love these little Briggs engines. I have a nice 9hp one waiting in line for a decent restoration.
@@AJRestoration oh perfect for Go-kart restoration project
Love it!
Just wondering about putting paint on the governor vane....change the weight?
How are your videos so relaxing to watch?? 😁❤️ awesome as always
Thank you Michael, I am glad you find it relaxing haha
Best motor made.
What?? I have not seen a single ball (or Roller) Bearing in any part of the B&S engine. Take a closer look. Give me a Honda every time.
It all depends on the owner of the engine. Yes roller bearings are better, BUT I have seen Briggs motors outlast Honda motors by far JUST because the owner looked well after the engine. I love Honda, Kohler, Briggs, Onan, Ducati, Robin, Kawasaki, Tecumseh, Victa, Rotax, Villiers, Suffolk, Yanmar motors equally. Each engine has its strengths, weakness. But I understand what you are saying. If you want reliability, just go Honda or Kohler.
You know that the lifters dont have to go back in the same spot right the bottom one can go in the top and the top one can go in the bottom
I have heard rumors that in a used engine its better to keep the lifers in the spot it came from. Not sure if it would make any difference. I did wonder about that though.
It's missing the governor rod
My ocd screams because the head bolts don’t match. I know I’m not the only one.
37:55 no sealing ? 😮
Looks like someone was running ethanol through it.
Never use ethanol in them small engines.
Hell I dont run any in my 5 pickups.
I had the same suspicion. These little engines do not like ethanol unless it has some upgrades.
If you have already seen part 1 or 2 skip this video. This is for new viewers who did not see part 1 or 2. Stay safe!
no I will watch again. I need my AJ Restoration Fix, A Junky you know.
Why do you paint some and power coat others?
فى المره القادم لأبد من تشغيلها
53:31 missing a label,
19.06 :-)
Ek was op laerskool toe ek laas 'n wit Briggs en Stratton enjin gesien het. Hulle is kannie dood enjins.
А катушка зажигания забыл!
so when you say restore you mean a paint job with spray cans no less and no case or tank gasket or gov. vain spring and you left the kill wire off the carb body but since it did not run dont guess it matters
Шатун не правильно поставили
👏🏻👏🏻🇹🇷
Salut ! Bisous très fort à toi et aussi t a femme + tes fils 👍🏻😀😁💜
Почему не завёл, так я тоже умею. Пошёл ты. Больше не буду смотреть дешёвые ролики.
the slow motion SUCKS.....................
So do vacuum cleaners ;--)
Стиль пьяного мастера,где дым?