How To Repair A Stihl BG86 Blower By Resealing The Crankcase

This video shows how to diagnose and repair a Stihl BG86 blower, that has a leaking engine pan (glue) seal, and a failed carburetor. It is commercially used, and actually not worth repair due to the overall condition of the blower, the significant amount of run-time on the engine, and the significant cost of labor and parts to perform the diagnostic and repair. This video is a demonstration of how to do the repairs.

[@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!

[@TommyD-yv5if]

Great video. Very well done. Thanks!

[@austinado16]

Thanks for watching and for the kind words!

[@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!!

[@JohnSaylock-ec4cd]

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

[@austinado16]

Fantastic! Nice job fixing it yourself!

[@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!

[@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.