5hp Briggs & Stratton Engine Teardown & Possible Cause Of Death
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- čas přidán 22. 11. 2012
- 5hp Briggs & Stratton Engine Teardown & Possible Cause Of Death
This is a follow up to this video; • Diagnosis of NON START...
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This is what Briggs & Stratton calls the "Koolbore" engine. No main roller bearings, splash type oil lubrication, and no inner cylinder sleeve. Just aluminum cylinder.
Some people call them junk engines. That's really not the case. I have one on a roto-tiller that my dad had, and now I have it. The way to make these engines last, is to change oil more often than other engines. Make sure it is full of oil before use. These engines do burn oil right from new. Just the nature of the beast! When using these engines, just make sure not to over heat them. Quite easy to happen. Just don't run them at full throttle. Let them cool down after 20-30 minutes of use. Still run mine and it still runs good for an engine made in 1973. One more thing is to pop the head and clean the carbon off the top of the piston. As said in the video.......the carbon severely dammaged the cylinder.
these engine are the best I have them in all my machines the key is to put mystery oil in the gas for upper cylinder lube and to keep the rubber diaphragm in the carb soft
Donny, thank you so much ! I'm doing my first tear down and rebuild of a 1972 Briggs 3 hp horizontal engine... I know I can do a reverse step by step from this to rebuild... Thank you again so much - Warren 👊😎🙏
All your vids are clear, steady and well explained. My preferred tutorials. Thank you.
It's amazing how expensive some of those specialized parts can be. The fuel tank you mentioned for $100+ for that roto-tiller cost the same as a new 42-gallon tank for my old Chevy!
Your a rockin mechanic, most shops around me fix stuff with as little effort possible. Iv never seen a mechanic take as much care as you do (unless there workin on thier stuff) Your one of the old breed, keep it up brother
Old vid.. but a handy one. I found a big old cement mixer on my property in the woods. It spent at least 20 yrs in the woods. Same engine. Rather than rebuilding tho, I bought (for 50 bucks) a running replacement. BUT... The replacement has a 3/4 smooth shaft... The mixer engine has a 3/4 shaft with teeth for the 6:1 gear reducer. Soooo... I'm simply putting the old crankshaft and crankcase cover, made to accept the reducer box, into the "new to me" engine... Which is super clean and smooth running.
Pretty straightforward with a little patience and research. Including this vid.
Excellent video, also isn't there an option to bore the cylinder (send it out) and then go over size on the piston what it takes to get past the scoring? Better than guessing piston sizes with a hone and having it lock up later?
Nice video Dony. Your disassembly was very instructive and showing and explaining carbon build up helpful. I have older 5hp that I'd like to get manual for from B&S site to replace/repair recoil that does not retract well but darned if I can locate any data plate. Any ideas where to look? Thanks.
great vid as always. I always remove the annoying sponge from those gas tanks before they become the root of many problems. I still do not know why briggs did that but before I do any carb/fuel-related repair, I always yank that sponge right out of there.
Hi there love your videos. Very informative. My question is, a type B1 briggs and Stratton the same as a type E1? I just want to change a broken crank shaft. Thanks
hello donyboy 73 really enjoy your videos, actually have learned a great deal. thanks!! say would you consider a video and explain the clearance between the piston and cylinder wall ?? thanks jim
thanks dony had gottne the sump cover off and couldnt figure out how to fix the insides and I knew there was some timing marks but thanks to you now I know what to do million thanks
When I was removing the sump cover on a 3hp B&S, the pushrods fell out so I don't know which is which. Is that a problem?
thanks, greetings from Canada!
Found this channel a week ago and have been watching everyday so honestly you are small engine LEGEND..
I don't think the damage on the cylinder wall was caused by carbon - it looks like the engine was run out of oil - this damage is consistent with a lack of lubrication.
@@chickenmaster7069 Una vez que se araña asi como ese asi lo limpies( Honing) se PEGA aun arrancando en frio NO VA MAS The END! B&S Scrap!
hi donny,i want to respray a engine which paint you recommend,also primer,any for under deck? thanks
Awesome! You are on my top 3 small engine subscriber videos.
Wow I the cost of a short block in Canada is wildly expensive, yes I agree with you ,the oiler rings tolerance appeared to be to tight that would definitely allow improper excessive blow by, I agree that's why the piston was carboned so badly !I'm rebuilding a 1974 briggs 3.5 hp for a fellow he just wants it built to run, so he can have a running antique engine, I was big time surprised all of the o.e.m. parts are still available even the o.e.m. paint in a rattle can is available i want to thank you , for all of the education you have shared with me, on small engines, I have recently been showing the neighborhood kids 9-14 years old how to do the things I have learned by following your lessons with small engines you have been a wonderful teacher to us, again thank you!
Cool trick for the flywheel! I have usually put on a puller and pried the wheel in different spots.
thank you sir
do u have any sump covers for a 5hp briggs that u dnt want i need one for my briggs build
Doing my first complete rebuild of flathead engine 158ccbriggs. What's best way to shine crankcase up any cleaner or just a good wipe down?
Hey dony I saw you used ur compresor tool to get the fly wheel of do you know where u can get a good quality manuel one
this vid is gonna help me out a ton. i have an older model of that leaf blower vac and it seized up on me the other day. stupid me didnt check the oil in the 30yr old engine that i got off of craigslist. ive never done a rebuild and this is gonna save me alot of pondering. also saw the other vid on how to remove the fan. thanks for posting these videos.
Hey do you know where I can get a short block for a 8 hp Briggs vertical shaft or should I plan on overhauling the one I have
Hi Donny. Your videos are excellent! Can I get some advice? Observations: My tiller won't start. I have spark (used a tester). Took off manifold and have black on top of valves with little carbon on piston. Piston moves up/down freely when rotating flywheel or outer engine pulley. No scoring at all when I move piston to the down position. But both intake and exhaust are slightly raised when piston brought to at the highest point of the piston; they are not seated. This is probably why there is no compression - air leaking out. Question: Is there a way to adjust the valves to seat when piston is raised? Or do I need to rebuild something? (I saw your video when you removed the piston -- disassembled the engine).
Very instructive video; thanks for putting it together! I wish I had your garage and tools.... I'm envious :-)
Hello Donyboy! last week I removed the crank shaft from a 5hp Briggs and both push rods fell out at the same time. What can be done to tell which one goes where.
hey donyboy i have a problem with a honda gx270 8hp that when it is accelerated or decelerate it just kicksback like crazy all over the place out of control what do u think it could be
Wow so glad i found this it's so informative thanks donyboy
Cheers for the video! What happens if you mix up the pushrods, does it cause damage? And how would you know which is meant to go where if you happened to mix them up?
can you put the crank in another motor,,
Great video, hone the cylinder and use the same piston, put in the new rings and that is good enough. Another option is to go with a new engine, 3/4in shaft and add a shaft adapter.
Congratulations for your videos. Clear, good quality, useful.
good explanation
thank you
your videos are clear and concise thanks
Can you help me find torque specs on an 8hp ic briggs? I cant seem to find them anywhere
Great video, very informative! Boy, those part prices seem so high, maybe it is really a BMW!!
That was a nice trick using the air hammer to remove the flywheel. Thanks for that.
nice tutorial, did you get to keep the engine for spares?
You're like the "Eric the car guy" of small engines. Good channel man, subbed!
thanks man!
No prob! I've been tinkering with small engines for years. I know a good mechanic when I see one!
Nice video.. you made it look so easy! I
Thank you!!
Damn! $400 for a new block??? Canada is crazy expensive.
Lots of good tips in this vid!
Taking a few pictures, is always a really good idea, since they can prove to be better than the best memory!
Great vid Donyboy! :)
Dony I am currently rebuilding a Briggs motor from a mower and one of the bolts on the cap that is on the connecting rod and crankshaft is rounded out, the other bolt came out easily but the other bolt is not and the head is rounded out, how should I get this stubborn bolt out??
2:00 my cover is IMPISSIBLE to get off! i tried a 5 pound sledge(it is a junk engine anyway) and it still won't come off,any ideas?
How do you know when you need to do a valve job on a flat head valve engine?
Great as usual Sir.
Fantastically made video. It drives me nuts when people ramble on videos, but you keep comments short and relevant. I also like how you show the action and then edit the video so that the next shot quickly skips to the next step. Maybe your next video should be a how to make a how to video!
have a good weekend
You are a good man Dony
I have the same engine. I'm using a screw in muffler but it rattles off because its on a go kart. The holes for the muffler have to broken bolts in the, it looks like someone tried to drill into it and use an extractor but failed. How hard would it be to get those out or if its even possible.
Hey donny, when i remove the crankcase cover, i clean the rust off the shaft with crocus cloth. It slides right off then.
Hi, I have very similar B&S 5HP engine. And I dot't know if it's normal that it has 0,3mm axial loose on the crankshaft and if I set the exhaust valve open so it has slight radial loose. Is it ok?
sorry to bother you again but i have tried to remove the crankcase from a briggs and stratton 35 classic and it will only come off around 1/4 inch and will not move any futher i have tried pullers hammer air hammers you name it and it will still not come off is there something else holding the crankcase to the engine or is it just locked to the shaft?
Thanks again
Can't wait for the next installment !
My Craftsman chipper/shredder has the same 5 hp Briggs as the one in this video only the air cleaner is different. The chipper was actually given to me non running, I guess the guy just bought a new one. The problem it was having is that the carb wasn't pulling fuel up from the tank so I pulled the carb off, thoroughly cleaned it, drained the old gas out of the tank and when I took the fuel pump apart which is on the side of the carb under a removable cover and found that someone put the spring on the wrong side of the diaphragm so it wasn't allowing it to pump fuel which was obviously a simple fix. After I put the carb back on and put fresh gas in, it fired up and runs great.
Thanks ...what size shaft thought
ok thanks for the tip
Dony do you have the equipment /ability to hone a cylinder at your shop. or does it have to be sent out to a machine shop?
the connecting rods on my Briggs has a metal lip on it I can't remove the fastener with out prying if off. is it ok to pry it off?? or how do I remove it thank you
Hey man I have the same problem did you ever figure it out?
Thanks for video
thanks
why some timews when i try to start the engine the cylinder presure is to hi ?
i broke 2 times the Recoil Starter
yes it's crazy
hello sir, I'm repairing b&s 5hp eng mod#1300 I had poor compression 45psi & lapped valves & I put new rings & I honed cylinder & it pops back thru carb & checked timing & lined timing marks but eng is not TDC ? that ok ?? what causes pop?? sound timing off??
Good work, Dony.
could make the valve lash different from before teardown, when I take it apart I mark them
I have a Question:
My Briggs still runs, but a valve ( i forgot which) opens twice.
like this: Valve opens-Valve closes, and while it closes the other opens and closes a tiny bit.
Is this normal? Sorry for my english
I have a Sycamore mower we bought new in '66 with the 3.5 hp Briggs Koolbore. Still a 1 or 2 pull start engine. Life depends on the level of care you give it. Sadly, most don't...
Hey Don, I just want to let you know that people (like me) often refer to your Vids. I have grown in basic small engine repair ability because of Vids like yours. So an accolade from Australia for ya!
Hey don I have a 1979 mastercraft snowblower with a 5 oMr 4 hp Briggs engine.... It won't start.... The valve clearance is good and it has ok compression ,... I just drained the oil and the was quite a bit of gas in it .... It also has good spark ... If u have any suggestion that would be greatly appreciated thanks a lot
Have you done a video on how you hone or bore your cylinder blocks?
OK, but hammering a rusted crankshaft snout through an aluminum plain bearing is not a good idea. That plain bearing in the cover is now kind of toast. Clean off the rust first with some sandpaper and penetrating oil.
yes
Smashing tutorial :-)
Its allways handy to know whats in a particular engine before the average user strips it down, and i know more about this engine than i did :-)
If i was the customer and you returned the engine to a "usable state" i would be happy as arry :-) , it dont have to be like a new one to be usable does it ?
Your tutorials are allways enjoyable dony :-)
thanks for video I know your along away from me but im on a quest to find some old briggs , cilton are any older motor to restore with my son if you have any leads are anyone you talk with I would thank you for the help
Just found an old engine that looks pretty much just like this one at my dump. I think the magneto is dead??? I just don't get any spark.
What if there is only one dot on your camshaft and not on the crankshaft and when you pulled out the camshaft both of the pushrods fell out at the same time how do you know which one is which.
Thanks for a clearly-detailed video, and for planning all the camera angles well. The audio level was easy to understand, but at the very first, you began speaking in a low-volume and rapidly, so the words slur together. You could provide a screen caption for that part, which would spare you the need to re-record that opening segment. Your concern for quality production values speaks for itself, so I subscribed.
hey dony , i have found a gas station that sells non ethanol gas, but its only 87 octane, i would like to make it 89 or higher, foe my small engines, is their a additive i can buy that will bring up the octane ? i have herd that some octane boosters are pretty much fake.
Love the black gloves, goes along with the whole 'cause of death' thing.
Where do you get parts for Briggs engines?
try also to show how to rebuild a 5.0 robin engine. oil flowing into cylinder head what the problem with that?
The engine symptoms before strip-down would have been a handy piece of info.
Ran into big problem took sump cover off and while removing rod from crank one of the bolts got stripped. Just the head. Vise grips didn't help. Anyone know a good trick to get it off??
i can do some, there is a machine shop here that does a good job
i'm not working on the space shuttle
@richardwernst. I have no clue what the sponge is for. My best guess is to stop the fuel from sloshing around to much. But with today's gas, the ethanol ears it up and reaks havoc In the carb. As I said I removed the sponge And the thing runs better now then it did without it.
there should be inexpensive manual puller on ebay
Question my friend....can you put antiseize on a flywheel shaft so the flywheel can be removed more easily?
Great Video Dony
Nice teardown video
Your videos are great!
Man those parts prices are Wicked!!!!
That sure encourages me to keep collecting these engines from the scrap yard!!!
Perhaps I can track you down a used block here :)
Great vid
Would the sump cover come off easier if you cleaned up the rust on the shaft before you try to pull the cover over the shaft, better on the seal??
yes it would
Ty old man