Stihl dropped torx bolt

I hyave a Stihl hand held blower Model BG86. that is at least 4 years old. The local dealer was the only one who ever worked on it and that was for some warranty work years ago. I was using it in the garage to do a Bill Murray clean up and a torx bolt dropped onto the floor. It still starts and runs fine, but I took all the plastic covers off on both sides of the case and the bolts were all there for those. I looked into the holes for the other bolts and they were there also. There MAY be more bolts under the starter flywheel,(I can see one thru the fin) or under the blower fan on the other side but hoped someone might know where this bolt might go before I break loose the fans/flywheel ? The bolt is exactly one inch long from the top of the head to end of the threaded area, and It has EJ stamped on the bolt head. It takes a torx socket size T-26

 

Are both the bolts for the muffler still in-place?

 

Good Point, had to check those, but they are both in place (Kind of wish they weren't from the look of the depth and the rust down in those holes. Still have to find the open hole if there is one. Thanks for the suggestion!

 

Check the handle and also the throttle trigger piece. Might have to turn it almost upside-down.

 

Does it have machine screw threads or threads more suitable for plastic?

 

It has machine screw threads, Chuck. Do you happen to know if the flywheel Nut is a left hand thread?

 

I don't think the flanged flywheel nut is LHT. You might need a puller but I'd first try to lock the flywheel with a large screwdriver so you can loosen and remove the nut, but be careful not to snap a cooling fin off. Once you get the nut off give the end of crankshaft shaft a good smack and the flywheel should be easy to pry off the shaft.

 

Here is a parts breakdown
Stihl BG 86 Blower (BG86) Parts Diagram, Ignition System (diyspareparts.com)

 

If you are going to lock the engine remove the spark plugs and fill the cylinder with starter rope with a little left hanging out then when you try to turn the engine nothing gets broke. In the first post you said the local dealer worked on it, maybe he dropped a screw and couldn't find it and just replaced it with a new one. Have a good one. Geo

 

I agree with Geo on the starter rope method. Thanks Manden for the breakdown. I see three bolts listed as ref #9 but No location for Ref #15 which is also a Stihl Pan Head bolt. The 3 ref #9 I am pretty sure what hold the case to the backing plate and they are all there. Let me know if you can see where the ref # 15 bolt(s) might be? Much appreciated! (they might be under the flywheel (I can see one there in an air gap when I move the flywheel)

 

I don't see how a bolt from under the flywheel could back out and fall out.

 

I called the local dealer where I bought it and asked them what the reference #15 bolts were and where they were located. With Manden's part numbers they traced it for me to what Stihl uses for a manifold between the engine and the carburetor. Yup, one missing there. Had to take the carb off to see it, not a bad job. Thanks for all the replies and diagrams!

 

Kooter, from the look of the one bolt I can see under the Flywheel, it would have been a pretty noisy and damaging proposition if THAT one did back itself out! Just glad that it was not THAT bolt, and that it happened in the garage rather than out in the lawn! I never would have known it was gone out there! Have a great day!

 

I guess the other two bolts held the intake manifold plate carb mounting bracket tight enough against the engine block where losing one bolt didn't really matter. Glad it didn't drop in the grass or you never would have found it (but you also wouldn't have known you lost anything!)

Good you got it replaced. Maybe a little Blue Loctite threadlocker on those threads would be a good idea!

 

Lol Great minds think alike! The Loctite blue Is on the bolt now!