Fixed - Stihl BR400 Leaf Blower Not Running Well - Stalling, Flooding Out, Won't Idle, Won't Rev-Up!
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- Опубліковано 22 лис 2023
- A friend of a fried dropped off a couple Stihl leaf blowers. He said the older BR400 runs, but is hard to restart and floods out. The owner purchased a used BR380 as a replacement to the BR400 and that one also don't run! Its leaf season and he needs at least one of them running asap. I thought this was going to be a quick fix, but was proven wrong. The BR400 was running well after tuning the carburetor, but now it no longer idles and the engine will not rev-up. Did I break it?
I no longer use Harbor Freight Super Heavy Duty Degreaser in my ultrasonic cleaner. Harbor Freight changed the recipe. The bottle previously stated "NON-CORROSIVE". Now it says "CORROSIVE", "do not user on Aluminum". It now damages most carburetors.
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2 Cycle, 2 Stroke, Air Leak, BR320, BR380, BR400, Base Gasket, Carburetor, Compression Test, Compression Test, Crankcase Leak, Crankshaft Seal, Engine Bogs, Fixed, How To, How-To, Leaf Blower, Mityvac, Needle Pressure Test, Pressure Test, Repair, Running Rich, Small Engine, Stihl BR 320, Stihl BR 380, Stihl BR 400, Stihl BR320, Stihl BR380, Stihl BR400, Stihl BR, Stihl, Tank Vent, Troubleshooting, Two Cycle, Two Stroke, Two-Cycle Two-Stroke, Unable to Tune, Vacuum Test, Won't Idle, Won't Rev-Up - Навчання та стиль
A man who never gives up and goes all out to repair a machine. Incredible video and fault finding. Always transparent, humble, and genuine content sharing the highs and the lows
He's impressive for sure. I've learned so much from these videos. Best channel on UA-cam...and no ads!
@@browsedeweb8834 he definitely helps with brilliant starting and diagnosis tips for sure
Jim’s instinct: 1 Test equipment: 0. We all learned a valuable lesson.
That was a very good lesson in decision making for us novices. I wouldn't mind seeing more 2 stroke videos in the future. I really enjoyed this one.
My mom has a Husqvarna blower with well over 2000 hours on it. A few years ago when I was just getting into small engines, it started running horrible and had no power. She took it a couple of places and they couldn't figure it out. She ordered a new one, so I just tore it down. That's how I learned about the spark arrester. I cleaned it, and the machine ran like new. She canceled the order and put it back into service. It ran fine for a few months, and then started doing it again.To cut a long story short, I put three spark arresters in it over the next two years. I finally got sick of it and installed the spark arrester delete package. Five years later, it is still going strong, and she has never had another issue, other than having to put a kill switch in it every couple of years.
May be adding to much oil in the fuel mix. The new synthetic oil can be run 50/1 on older machines. But make sure your machine will run on that mix with no issues.
You get the "Bulldog tenacity award" on this one. Well done sir. I bet your heart nearly skipped a beat when that Model 400 revved up.
I noticed that you cleaned the pre-filter by blowing air through it from the outside in. That only pushes debris into the paper filter behind. Best practice is to remove foam pre-filter and blow it out!
This is also hind-sight, I wonder if re-torque of cylinder bolts, with original gasket, would have solved problem? Have watched many of your generator videos and am always impressed with your logic toward a solution.
I was thinking the same thing. Especially since it passed the pressure test.
an old man once told me "Persistence is the most important skill" and you have that to spare...great job
I’m 69 and I will learn something from you almost every time I watch. You could publish a book with illustrations and make a fortune. Call it the small engine mechanics reference.
Don't feel too bad. Your mistakes saves many of us a lot of time and trouble.
The older BR400 would still be my choice of machine - better build quality than the equivalent today. Once again great work Jim.
you can learn so much from this channel and he makes it very entertaining love it
I was scratching my head just like many others trying to troubleshoot this one, saying it has to be the carburetor, the words clone carburetor, well, it made it suspect. The end was excellent. It did teach me a great deal. That is never give up. Thanks a lot. Im ready for my next video.
As to the clone carbs, my grandfather was fond of saying "you pays your money, you takes your chances". The other saying, which I'm sure you've heard, "if it had been a snake, it would have bit me". Two cycle engines are a very different breed when it comes to troubleshooting. I have had similar issues when I think, without a doubt, it's this. And it turns out it's not. Great job James.
The expression used by my father was "if it had been a dog, it would have jumped up and bitten me" when talking about something which in hindsight should have been obvious.
Great sleuthing as usual. I wonder if just tightening the four jug bolts would have solved the problem? The fuel/oil mixture must first pass through the crankcase of a 2-stroke engine before entering the cylinder so the cylinder could not fill with fuel without the crankcase first being completely full of fuel. Therefore a leaking needle in the carb could not be the problem.
I went through all the same tiring troubles as this project but on a chainsaw of mine. Gave up on it for a year then revisited it with the same final fix. I just had to fix it for peace of mind
YES! This is going to fix my 30 yr old Stihl FS-76 trimmer! Almost threw it out a dozen times but stashed it in a corner as punishment, anxious to tackle it again with new info.
I have the exact machine and it too does a great job. I did pull the spark arrestor (wouldn’t run with it) and keep the carb happy. Think I will check the jug bolts!
As always - well done.
These old STIHL blowers were much better than modern 4mix blowers nowadays. They performed just as powerful as the BR800s
The specs on paper did not look great, but it performed really well.
I couldn't believe that you didn't follow your instinct which are always great. Seems like you would have checked the bolts with all the leakage. But great video thanks.
James! You have so much patience! After pull #875, it would have been in the trash and I would be off to Home Depot for a new one. Great job.
I love people like you. Lol. Iv made a ton of money of you people. Lol. On garbage night I'll ride all over by the big yuppie. House s they throw away tons of this kind of stuff.
These are the ones where you begin to doubt your trouble shooting skills. When you finally find the problem...or sometimes stumble across it, the eureka moment is that much sweeter.
I knew it was the cylinder gasket. I have done a few of these. They have a angle on the inside the bottom of the cylinder so you can just use your finger to get the rings in the cylinder. I put Permatex Aviation Form A Gasket on both sides of the gasket .The oil leakage was the sign. Always check how tight your screws are first. You found it but it cost quite a few bucks and time. You won't make that mistake again. There is a lot of vibration on these that can make screws loose. They usually use silicon. I use the right stuff on the crankcase haves. They very rarely go bad cause there is no gasket there. Live and learn.
The leak on the carb would not have helped but the gasket leak was clearly the issue. The oil everywhere was the smoking gun. Fantastic repair. That would have defeated me. Those pressure and vacuum readings must have thrown you off the scent for a while. Btw your videos helped me with my lawnmower. I fully serviced it for a fraction of the cost of taking it to a specialist so your videos do help
Happy Thanksgiving Jim and family...You had it right before buying another carb...I do the same thing often...Your videos are an inspiration! I have got all three of my Predator machines running again after a year of being down and my two chainsaws going again. Your videos helped me, so it "helped someone" as you always say!
Happy Thanksgiving to you and yours, Jim! I just did 2 BR 400s and a BR 600 for leaf season down here in NC. Rebuilt one of the carbs and the other two ran great after some tuning and maintenance including air and fuel filters and cleaning the spark arrestors. The ONLY thing I would have done that you didn't would have been to torque the cylinder bolts and test it again before replacing the gasket. Surely can't go wrong with a new gasket, but I'm curious as to whether re-torquing would have made it run right too. Fantastic quality as always!
Hello James Very good video. May I suggest the reason your tests did not reveal any issues is lack of vibration during the tests. When running the engine would seal and leak itermittently. That is why they can be so difficult to diagnose. Your stick to it perseverance paid big dividends and you found the issue. Keep up the good work.
That's what I call persistence! Nicely done James!
The biggest mistake people make is just tightening the base gasket and not replacing it which will surely fail later and give you headache
On a two stroke typically you apply vacuum and pressure through the intake to check the bottom end seals. I think that could make a difference in readings.
I don't think it matters if the piston is at the bottom point,I perform tests in this way, making sure that the cylinder is always in the lower position.I think the problem is in the bolts on the cylinder, they were tight enough not to leak when the engine is not running, but they were not tight enough when the engine is running and making vibrations, then false air could enter. Jemes himself said that the bolts were very loose,although I'm not sure, at least that's how I think that was the problem
Hi a hard lesson for me was also a Stihl but a chainsaw with a lot of time on it. I was not familiar with 2 stroke stuff at the time. the problem was similar the give away was when you rev it fuel would spray out the carb but still run. the root cause was the piston to wall clearance was too great and allowing blow by from the crank case. the fix is replace the piston and cylinder set.
Rich
Even though the clone carb wasn't the main issue, it was going to be a future issue. OEM is always better in my opinion.
Patience pays off and man, you do have some of it 🙂.
When "running" the cylinder must have been liftet slightly from the base at each compression stroke, causing "puffs" of leakage. After those leak tests I really did not see that one coming, although all the oil seeping would indicate something like that.
And yes, I really learned something here.
Great work and video. That's why I bought a battery powered leaf blower 3 years ago. It has started every time. Good throttle response. Quiter. Doesn't smell. Good power (60 volts). And I have more time to watch UA-cam videos.
The cap allows air in the tank not out. Its the metering lever in the carb thats stops flooding
Love watching you work on theses machines. I have definitely been helped. Watching this one made me think it’s a good thing they didn’t bring in a BR-549! 😬
I'm amazed at your patience! For me with a gravel driveway and no garage I would have probably given up after 10 minutes. 🙂
And here I thought things were pretty much done at the halfway point. Two stroke motors are fiddly... the smaller, the more tricky. Although I infrequently work on small engines, your determination is a great motivator. When it doesn't work, stop and THINK about it and try again.
One word James. Tenacity, well done and thanks for sharing. Happy belated thanksgiving.
Thank you for cleaning that machine. It was driving me crazy, lol.
This is the best drama I've seen in a while. I'm on the edge of my lazyboy. I sure hope the new carb works!
You have the patience that I don't James. A good job and the carbie spare box has been added to.
Great job. Let's face it....there is no other more annoying noise than a two stroke gasoline engine and there is no other annoying pull start anything in the world than a two stroke. You have the greatest patience level I have ever seen.
You’re a determined person and don’t ever give up. Nice job.
The plastic choke piece on that model of stihl was always one that would break on a regular basis . It took stihl years to finally get that change to a better design . When I seen all the oil around the bottom seal , I was pretty sure that was the problem . On any gas machine two or four cycles ,if they are running or not any bolts that's are relatively easy to get to I would check to make sure there tighten fairly well . Anything that's has oils or gas leaking is a pretty good bet that vibrations from running loosen things up .
Excellent that you stuck with it and got to the real problem. Thanks so much for these as the difficult ones are where I learn the most from you!
The patience you have👍 brother. I would've broken the thing and bought a new one😁😆😅🤣😂
I have a BR400 I bought several years ago. Put around $40 into it for parts and I’m still using it to this day year around. Quite impressive for a 50+ cc engine on a blower over 30 years old. I did a walk around and demo on my channel a while back
A leaf vacuum can be fun to use.I had one of those leaf vacuum/shredder however it was electric.Juggling and dragging a long extension cord really made it a production process though.
Epic battle! Blower finally conceded👍👍👍
Absolutely James.... especially videos like this will help someone. Happy Thanksgiving to you and family.
You too, thanks
I also work on two strokes, I enjoy watching your show you do very well at it
Hi James. Just a thought that anytime a car engine has a split block. A dab of silicone should be used right on the joint to prevent a leak, either on intake or oil pan. So I would surmise that the split crankcase on this blower might benefit from the same treatment.
Wow talk about persistence and a wealth of information. I have a chain saw starting very hard if at all. Now I have more things to check out. Keep up the good work James.
Watching this fight that you had with the BR 400 answers why my Troy Built string trimmer never worked right straight out of the box. I should have taken it back. I went through the exactly same steps that you did, but, after having the trimmer work one day and not the next for years, I eventually gave up and gave it away. The giveaway was when you said the crankcase gasket was leaking and ultimately fixed the problem. I remember my string trimmer was always full of oil and I couldn’t figure why it was like that. This episode explained a lot. Great job, as usual!
The stihl Br models were best ever made.Shame that stopped making them.
I just rebuilt my br 420.It’s 27 yrs old.
Thanks for flogging glorious day of giving thanks to your family s 🎉🎉❤❤😊😊
Thanks Jim Have blessed thanksgiving.
Thanks, you too
IM A LANDSCAPER. AND I LIKE BACKPACK BLOWERS. THE BEST.
I'm going to have a look at my little hand held blower it's doing the same thing, thanks 👍
the kind of guy crazy enough to envision turning an explosion into rotary energy
he finds every little things stuff you would not even think of he is so smart
This is why I like watching your channel. Keep up the good videos.
Always happy to see an upload from you
Give James a thumbs up for figuring this out!
Well done James-I'm glad you kept at it and didn't give up proving once again that in all things we can be glad even during trials: "..knowing that tribulation brings about perseverance; and perseverance, proven character; and proven character, hope; and hope does not disappoint.." [Rom 5 v3-5a] *Truth is a stubborn thing.*
Definitely this video helps many people. Thank you James.
Happy Thanksgiving thank you for all you amazing videos and all the time and information you do amazing work and I look forward to what's next thank you so much
Great video as usual!
great job as usual sir!
Here I thought after you mentioned that you originally suspected the base gasket that one of the times you turned the camera off that you had changed it off camera! Great video!
Great video Jim!
Great show, good thought process
Great video!
Always go with your gut! Thanks Jim!
Great video James!
Really great job again!
Well done James, your tenacity is inspiring.
I was completely convinced it was the coil. Thanks for the detailed videos and showing the results. You are the man and happy Thanksgiving!
Great job 👍
Great troubleshooting. Wow.
Your amazing James, really enjoyed this video.
Love your work. It's helped me many times....Thank You!
Excellent Video. I was with you every step... Thanks for telling the "Why" as you go along. Really helps me understand the machine and the concepts. I learned a few things here.
That's the problem I've had when stuff gets older/lots of usage, it's just worn and to fix the equipment can be quite the troubleshooting process. Not to mention some of the OEM parts for older equipment is very expensive. I recently bought a OEM carb for a Kohler similar to your late 90's John Deere for a Scag and that was almost $300. I bought an OEM ignition coil for a 2002 toro snow commander and it was $80. I don't mind clone parts but I also don't want to have issues return or deal w/ taking something apart multiple times when I know it's not OEM, especially when it's something that's a pain to put together like my snow commander.
Great video, so many times i've run into problems that weren't so easy to diagnose. You are very thurough and meticulous. i learned alot. Thank you.
Great troubleshooting video for us subscribers!
Great video! It helped me a lot!
so glad that fixed it james
I appreciate your troubleshooting.
You need to remove the shrader valve when using the compression tester hose as you are not letting pressure in.
Incredible perseverance! Good job 😅
Great work, right to the end, I would have had the same conclusions, totally enjoyed this one, thanks
Best video yet well done ! I watched it in 3 sections and it was stressful to watch !
Wow that was a good one I wasn't expecting that one Thank you for the video
Thank you, that was another great video.
I can't tell you have many leaf blowers I'd looked at that had loose head bolts. Happy thanks giving
Happy Thanksgiving James and family,I appreciate your dedication to getting a video every Thursday
James, I have a Redmax 8001 and although there’s new models, this was and still is a beast of a blower, but heavy. I actually prefer wet/damp leaves because this is so strong I can blow them forward no problem and the dampness keeps them down enough from getting caught up on any cross winds. I also use mine for snow clearing on cars and driveways when it’s a light fluffy snow, up to 2-3 inches.
Some of these machines can really keep you up at night. Excellent diagnostic work and another great video.