Briggs and Stratton Engine Repair 3.5HP 1980 | PART 1
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- Опубликовано: 4 окт 2014
- An old 1980 Briggs and Stratton 3.5hp engine repair series. Welcome to part one where I am cleaning and rebuilding parts of the engine.
My intention for this small engine is to clean it up, service and paint it. Then finally get it running where it can be seen in all its glory.
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I just found this exact same lawn mower in my neighbors barn and am messing with it now, thanks for this vid!
Nice video, I do the same as you, buy old engines and restore them, I only have a few in my collection at the moment I have a Sthil FS96 engine which is quite rare, a petter A1 engine, an old 1980 12HP I/C Briggs and a few more, keep up with what you are doing, brilliant and very informative.
Nice video. Not over explaining, good camera work. Short and too the point without getting off topic. Two thumbs up.
I'm 15, and I was in my friend's neighborhood about a month ago someone was throwing away an old briggs engine from the 70s and somehow the oil looked brand new and it ran great
the guy said he never used it and it was just in his garage
I'm restoring a 1985 Murray push mower, flood recovery you can see running on my channel. It has that carb, but with a heated choke spring and it has that same diaphragm with the vacuum pull off linkage. It uses the screw in muffler instead of bolt on. No decals on the recoil housing, but an embossed logo where you have the rectangular sticker. It runs really good, but has some cylinder scoring that I can see, but not feel. It's really been through a lot of trauma with the tax day flood in 2016, then Harvey the next year. Sat outside for who knows how long, unloved. I'm thinking of polishing the block and doing something other than black on the recoil housing, maybe gloss red. Painted the gas tank flat black. Silver high heat for the steel part of the muffler. The deck is going to be the hardest part, lots of rust, but no holes.
Hey! Greeting from texas... i have a few of those b/s pulse jet engines some bought, dumpster dives and freebies. One, mounted on a atlas 20inch deck from assume the 80s or 70s. Insted of dealing with the old parts for the carb i just put a new style pulse jet carb and tank on works great... next project is a wizzer mower from the 50's!
My Briggs and Straton lawn mower is 20+ years old and starts first time, every time.
Grampian Glider mine is 59 years old and starts first pull every time
Hey, great video, have been keen enough myself to take sump off one of these so thanks. Got a heads up tho, the previous owner has also lost the spring and round shim for your carb as well as the screw, if you watch another briggs autochoke video you can see the part in talking about. They said it's very important for the running of the mower. I don't want you throwing all that work away if it won't run dude.
Hey this stickers upside down too and this one's from the factory!!!! That's just a little jab from that beautiful tiller that you did!!
3:01 "Not the right gasket for this engine". Actually they made one gasket which fit the 3/3.5HP (9 cubic inch) engines and the 4HP (11 cubic inch) engine, which had a wider crankcase in that area. The gasket 'flap' you noted is actually the part that makes it work with the 4HP variant. It is very likely a factory installed gasket.
you should use a straight edge and the appropriate feeler gauge I want to say .03 , not sure though, on the top of the tank especially the part where the choke spring goes around the 10 -11 o'clock position where there is the round hole with the small metering channel that goes to the big recess where the choke spring goes. Those tanks warp a lot. I think it is from pouring cold gas into the tank after the mower has run out while running.
I have this motor although my carb does not have 2 fuel feeds to the carb as yours does. It just has one fuel feed on the bottom of the carb along with the spring for the choke. Can I replace the old carb on this engine with a bulb primer carb? Any idea of which carb I might use? ie. Briggs and Stratton ref. number. Thanks, as you can see I really appreciate your rebuild blog.
One unique trait of that engine that is the exhaust muffler... and the locaton of dipstick very different from what i have seen here
But those little pulse jet engines are highly underrated simple and very rugged when treated right
What's the little cable/wire that's sticking out on the left side of the spark plug doing?
Wow Cool Video
Rauman
I have the same engine on a tiller great engine
I got one of these recently, its been sitting for the last 20 years.
There seems to be some sort of pudding in the gas tank
@@danielauen7790 thats varnish you need to thouroughly clean all the carburetor parts and tank its a very hard job but it has to be clean
@@hunter7476 it was much worse than that, I didn't have the motivation to fix it, so I scrapped it.
some of these old 3.5 HP Briggs and Stratton engines will have different starters one a wind up starter and in the 1970s a vertical pull starter. as the engines made before 1982 will have the points under the cover under the flywheel angines after 1982 will have a Magnatron electronic ignition. the carburetors they have a vacujet or a pulsajet carburetor the engines from the 90s and later will have a pulsaprime carburetor a plastic carburetor with a primer bulb. as well in the 1990s and later the shrouds are more styled and offered as the classic, Sprint 3.75 HP and Quattro 4 hp. till in the 200s is when Briggs and Stratton switched the power rating to Gross Torque. as the later 3.5 hp engines have a plastic camshaft in it. as the older 3.5 engines from the 1950s- the 1990s are designed better with a metal camshaft the blocks from the 1970s to the 1990s are modular as parts can be interchanged but painted to match the color. as the engines from the 1980s will have if on mowers a blade brake on them some saying System 2 Manual start. in the US in the 1980s is when the blade brake became manditory on all rotary push mowers, edgers, and string trimmers. as the old engines are good for display too.
Great vid Can’t find part 2 can someone please link me to it
I have the exact same engine and need piston rings where do you get the parts you use?? Btw I love your videos 👍
Mine has that gasket overhang too
Did you ever finish this restore. I was hoping to see a test run.
can you confirm which side the spring goes before putting the diaphragm back on? I didn't see it being removed or put back. also how did you clean the main jet? thanks.
spring sits against carburetor, then diaphragm goes over spring, then attach to the gas tank. It is easiest for me to hold the carb and gas tank upside down until it all sits right
How did you get the engine of the mower body
Does anyone know where I might find parts and gaskets for this engine? I am trying to rebuild/restore an almost identical engine to the one in this video. Except mine was manufactured a bit later, March 7 1986. It's older than I am lol.
Ebay is a great place to find good deals so is this place www.jackssmallengines.com/jacks-parts-lookup/manufacturer/briggs-stratton/100000-19z999-series/10j900-to-10j999
Briggs typically came in black, white, or orange. This one was white originally, not cream. Haha
B&S service replacement engines had some different colors - hammer-tone silver, copper, charcoal gray amongst others. They would also custom paint for volume-purchase customers - I have seen many John Deere yellow engines over the years!
We're is Part 2 , can't find it?
I've got this same engine in great condition like yours but black
Paul Herman I have a engine like this but mine smokes a lot and is red
try replacing the piston rings, i had the same issue and that cleared things up.
Paul Herman i have the same just from 1968
Where do you get a replacement diaphragm for that carburetor? I have the same one but it is ripped
Dane Falardeau I’m looking for one too, look on jackssmallengines.com
or your local briggs delaer
Hey mate, I have the exact same engine and I was wondering if you could tell me the name of the small metal part at 4.12. It's in the top of the carb on the beige colored valve. It looks like a tiny screw or jet? What is this part and how necessary is it?
Did you mean on the flap valve or the flap itself?
On the flap valve. Basically, I can see 2 holes where there should be 1?
Yeh it's needed, that secures the flap too the metal rod that runs through the flap valve. did you loose it or something? If you found it like this I would do a good look over of it and make sure nothing else is missing before you continue. Someone may have used it for scrap parts, those don't simply fall off lol
Thanks mate, I will take another look at it tonight. I will try take a picture of it to clearly show what I mean. As far as I can tell, everything else is in order. I've replaced the diaphragm as well to eliminate that. The engine starts, but only using starter spray.
Robotchickenlizards@outlook.com Funny thing, this is the first engine I ever took apart, it was in like 1995 sparked my interest when I watched this video.
Your missing the spacer cup and spring that goes under the diaphragm on the carburettor ,you can see where it would of gone by the big circle mark on the diaphragm,
¿Como se el número de modelo de mi cortacesped si no lo tiene?
When you were cleaning the carburetor , you did not show taking the mixture screw out and cleaning the jet inside .
How Much Was It?
First time I've seen a hex-head cut on the end of a crankshaft...
M Cruse so it’s set up for a starter clutch it’s a weird setup it works though.
As best as I can make out these stampings:
MODEL 92902
TYPE 1789-01
CODE 80071805 (July 18, 1980)
Any suitable gasoline؟؟؟
You sound like daggerwin 👍🏻
Herman Wallin this is daggerwin's other channel
Herman Wallin he is daggerwin
GOOD MORNING AMERICA IN VIETNAM. THANKS
do you have another youtube channel
Daggerwin
Please. ..i have thé same engine....could you give me thé reference off the spark plug .....thanks
Ngk bm6a or champion j17lm and oil is 10 w 30 .I hope this helps you.
@@SuperMoses29 thats correct
Were do you find these engines?
Mainly on Ebay but you can get them from car boots, auctions, gumtree, local adverts etc.
Trucks&Shit I have one
I have.one that has a vertical and horizontal shaft.
I found one on Facebook marketplace lol
the round spring and cap are missing from under the diapram
ya thats what pumps the gas
Why put the same old diaphram back on?
+okrafoot because it was good
Mines yellow!
What's white spirit?
Paul Herman it's kind of a cleaning solvent most often used for cleaning paint brushes, but it has a multitude of other uses.
Paul Herman mineral spirits in the US
Its missing the large spring that lives under the diaphragm
actually not as rare as you think!
shaveings are not bad in oil
Where is part 2 then ?? Not happy with this mate
Yeah where is part 2?
Because of the low value of these engines, I believe it makes more sense to just do a compression check on them. If it has adequate compression, I drain the oil and then clean the sump of sludge with a little gas, sloshing the gas around and then draining it. Then I refill with 10-30 or 30 wt. synthetic. It makes no sense to remove the sump on an engine with compression unless the crankshaft seal is leaking and needs to be replaced.
I have one of these. It's bad.
how do you check oil level?