How To Repair A Stihl BG86 Blower By Resealing The Crankcase

[@edmckinley1333]

Beautifully done and excellent video, doing the same thing to a Stihl BG55, thanks for sharing..

[@austinado16]

Thanks so much for the kind words, Ed! I'm glad the video was helpful. Just brought back a 55 from the dead about a week ago.

[@brianserrao2331]

Without a doubt, this has to be the best instructional video on the internet with regards to repairing a Stihl BG 86 leaf blower. Simply a beautiful video... thanks for your instruction.

[@austinado16]

Wow, thanks! You made my day!

[@johnmissel4348]

Excellent video! Thanks!

[@austinado16]

Thank you John!! You made my day!

[@johnmissel4348]

@@austinado16 Well you made my day as well by doing the awesome video!!

[@TommyD-yv5if]

Great video. Very well done. Thanks!

[@austinado16]

Thanks for watching and for the kind words!

[@applianceman6009]

I got a 6 year old BG86 that has been used a few times a week for residential use. It isn’t starting well, but it runs fine once warmed up. It is leaking a lot of oil residue. Is it likely just the diaphragm or did the crankcase gasket fail? This machine was not heavily used.

[@austinado16]

There's no way for me to provide an accurate guess. May I suggest you take the starter assembly (the orange cover) off the machine and inspect the crankcase pan, as a first step. The correct way to diagnose would be to do a vacuum and pressure test on the crankcase. Of course there are other things that will cause difficult cold starting, and poor running until the machine is warmed up, and those would also need to be looked at first, as part of the diagnostic path, working from "most simple" toward "most complex."

[@lucasjenkins5222]

So explain why this is not worth repair but you were able to do it? Is it the cost of the parts bc all I saw was labor(I won’t charge myself,) engine pan glue and a new carb. That doesn’t seem to be as much as a new one. Trying to repair myself so just trying to understand what I’m missing

[@austinado16]

I explain this in the description of the video. My comments are based on that I'm working on a commercially used machine, for a customer. When a repair approaches or hits 50% of cost, the equipment is generally deemed to not be worth repairing. That will change now that California has outlawed gasoline powered equipment. However, that's always been the deciding factor. For a DIY person, of course you don't charge yourself for your time, take pride in doing your own work, and probably enjoy repairing your own things, vs. tossing them and spending on new. You also get to learn something, which is fun.

[@TGMForum]

I'm betting it was just the fuel pump diaphragm causing this. If you remove the fuel pump diaphragm from the carb and hold it up to the light you'll see a little line of tiny holes have appeared. This allows the fuel to be pushed straight into the crankcase via the pulse hole. It's a common problem on this machine.

[@austinado16]

I appreciate the tip! What I love about spinning wrenches; there's always something new to learn! I have a carb that I removed from a recent BG86 and I'll pop it apart and take a look at that pulse diaphragm. Will report back!

[@TheJanope13]

So essentially just needs a carb kit through it and wont need to open up the crank?

[@austinado16]

@@TheJanope13 This machine had both a failed carburetor and failed engine pan gasket.

[@JohnSaylock-ec4cd]

Thanx, i had that filthy kill switch. Runs great now.

[@austinado16]

Fantastic! Nice job fixing it yourself!