STIHL BR 400 Won't Start - Carburetor Leaking Fuel, Engine Flooded, Backfiring (FIXED)

I found this STIHL BR 400 on Facebook Marketplace for only $70. The seller said it ran last year and thinks it's only a carburetor issue. I just fixed a BR 400 last week and have an extra carburetor and a few other parts. Should be an easy fix right? Although this is the same model I fixed last week, it's not the same problem.

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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Fuel Line: STIHL 0000 930 2803 (00009302803)
Spark Plug: NGK BPMR7A
Tank Grommet: STIHL 0000 989 0516 (00009890516)

#Stihl #SmallEngineRepair #SmallEngine #DIY #Fixed #Troubleshooting #HowTo #timing

2 Cycle, 2 Stroke, BR320, BR380, BR400, Backfire, Base Gasket, Carburetor, Carburetor, Disassembly, Dripping Fuel, Fixed, Flooded Engine, Flooded, Flywheel Key, Fouled Plug, How To, How to Check Timing, How-To, Intake, Key, Leaf Blower, Leaking Carburetor, Popping, Puller, Repair, STIHL, Small Engine, Spark Arrester, Stihl BR 320, Stihl BR 380, Stihl BR 400, Stihl BR, Stihl BR320, Stihl BR380, Stihl BR400, Stihl, Timing, Troubleshooting, Tune-Up, TuneUp, Two Cycle, Two Stroke, Two-Cycle, Two-Stroke, Wet Spark Plug, Will Not Run, Won't Run, Won't Start

[FarmCraft]

Haha, lost the keys twice! I bet there were some 4 letter words involved in that fiasco! Great troubleshooting Jim, thumbs up.

[goofe.washington]

The diagnosis using the screw, to indicate that the magnets were off, was excellent. Common sense, but I never would’ve thought of using that method. Just excellent.

[YukonHawk]

I love that your wife and dog tried to help you.😅😅😅

[volvogt]

Nice to see another blower. Nice change from generators.

[DanKoning]

First, it's sad to have to admit this but with fraud/corruption being the norm today, I usually doubt those who say they're trying to help/benefit me in some way. After being burned so many times I'm always looking for the catch, so it's hard to trust people like before—but every now/then I do. I can say w/o reservation, I believe that James and the words he closes with each time are genuine: *"I hope this video helps someone."* I have no doubt that both are true. 👍 as always. God bless.

[AW-Services]

I love Thursdays, especially when another video appears. Another one saved another fine fix

[bertgrau]

Another extremely good video, I didnt think about the screw to find the position of the magnet, I would have just taken it apart if i thought it was the timing. A great tip for sure. 😊

[pilatus]

I'm pretty sure with the carb issues this engine got flooded and hydro locked and that's how the key broke. Thanks again for a great video.

[gonzo_the_great]

I had the timing wander on my pressure washer recently. It got harder and harder to start over time. The keyway was cast into the flywheel, but had sheared.
A bit of filing and a new key and all good.

[MrRmh]

The port in the housing is to make the machine a sprayer for plants. Different fertilizers and so on. I get a kick out of you with that torque wrench! Good Job!

[TheLawnmowerLady]

"Ran when parked" That's what they all say. Glad you got it sorted out.

[markyoung]

We now are calling you the Blower man /Generator guru Nice job Jim 2 thumbs up 👍👍

[GNX]

James, get this, my parents had a motobecane moped way back in the late 70’s or so, that had a flywheel magneto and crankshaft with NO woodruff key. The only way to have it installed and right was to have the flywheel timed and pressed on the tapered crankshaft then the bolt tightened, at the moped dealer shop, and my recollection was that we had to have this done several times over the course of its life, till they finally got rid of it.

[daveruzius]

These videos are not only instructive, VEEEERY relaxing (I watch these as slowTV instead of fish tank or fireplace vids) but also sometimes very funny (losing the keys to your wife / dog). Loving it. Thx so much!

[richb]

HI James, the way I have taken off the flywheels is cut two wood wedges and lightly tap them in between the case ( not too tight just enough to apply tension) and flywheel then with the nut loose tap with a brass hammer, they usually come off in one hit. then to remove the key, with a pair of side cutters grab the key and leverage out
Rich

[josephpuchel]

Hey James excellent tutorial. Sometimes it’s hard to get parts because of them being discontinued.

[paulsullivan]

Well truly...the dog almost did eat your homework. Once again your high skill level was on full display. Well done sir.

[martin]

The clone carb is working perfectly. While you had the plastics off, I would have re-torqued the cylinder, after what had happened to the previous one James. Keep em coming James🙂👍

[michaelkennedy]

Love it!! Nice coffee and a James Condon video on the "cold" 38 degree morning here in Florida. We had " Florida snow" here this morning (frost) so this is a welcomed video..

[chrisbolton]

I've got a BR420 with the exact same no start problem. Just took it apart and sure enough a sheared key. I know what caused this though. I found the blower laying face down in the shed one day and righted it. Went about my business and didn't thing about it. A few weeks later I went to start it and it was hydro locked. It doesn't take a whole lot of pulling for that tiny key to shear. I had another blower so I set this one aside and haven't thought about it until this video popped up.