Stihl HSA 86 / FSA 86 R Throttle Trigger
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A throttle trigger for the Stihl FSA 86 R battery powered whipper snipper / line trimmer. Seems to also suit the HSA 86.
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Model information
- Source
- Printables
- Category
- Outdoor & Garden
- License
- Creative Commons — Public Domain
A replacement trigger for a Stihl FSA 86 R, we've broken and rebroken the trigger 1000 times after using various bits of glue. Maybe we're dysfunctional or maybe it is, either way here's the model if anyone wants to print. It seems to also match the Stihl HSA 86, although we haven't broken that one yet.
These are hard to source where I'm from (Australia), at least online, and I'm too scared of phones to contact a local Stihl dealer. Seems like replacement part wise it comes in a full control trigger pack. Some UK website pegs it at around 12 GBP (24 AUD) + a gazillion in postage. I considered it but we broke this quickly and will surely break again, I'd imagine the print itself is maybe $1 including power usage and time spent whinging to myself about it breaking again.
Warning: I made this quickly and essentially just copied the original design exactly using splines and other hackery. I'd usually spend a bit more time and understand what is "plastic mould requirements" vs "won't fit" so I can minimise the design but I didn't really have time. That being said I did make the main trigger (the part that breaks) a nice solid lump. Here's hoping it isn't an intentionally "snap offy" bit to prevent worse damage inside.
Supports required: Yes. I did put some bits against the bed that would have been a little floaty but there's still floaty bits.
Material: I used ASA, you can use whatever you feel like just consider UV.
Other stuff: I went pretty much full solid, but optional.
To install:
Unscrew torx screws around battery and handle
Pop the side with screws off, holding the bottom so it ideally stays on
Find trigger, take note of placement and little spring underneath
Remove trigger
Replace trigger, you need to hook the spring from outside the body then lift trigger a little while rotating until it drops into place
Replace side - take car of the top "trigger" as it tends to get unseated. Hold together tightly and make sure the operation still works. Also pay attention to battery cover area there's some slip in parts.
Replaces screws
Celebrate
Do what you want with this.
The spring holding fin is a little flimsy, in that I could break it somewhat easily with my thumb, but it's not under strain when in use. If it snaps I'll modify and update this model, likely just making it a little thicker.
Onshape Document for you to cringe at.