On mine i drilled a hole after tightening the Binx nut and fitted a
stainless D clip
to stopped the Binx nut moving, or at least migrating too far, Its a item i
check regularly when ever the cowls are off,
Another way is to fit a additional locking nut screwed up tight against
the Binx nut
Ivor
On 21 August 2012 18:37, Sidsel & Svein Johnsen <sidsel.svein@oslo.online.n
o
> wrote:
> Hi all,****
>
> ** **
>
> Just a word of caution:****
>
> ** **
>
> The Rotax engine ring mount is bolted to the Europa engine frame with fou
r
> bolts with M10 Binx nuts (the Binx nut version that is slightly oval insi
de
> before screwed on to the bolt, thus having a selflocking function).****
>
> ** **
>
> Inspecting the engine today, with both cowl parts removed, I discovered
> that the nut had unscrewed itself so much that I could easily turn the nu
t
> and the bolt around (meaning, by the way, that the three other bolts were
> holding the engine firmly in place). Total 171 hours.****
>
> ** **
>
> The =93Rotax 912S Installation Manual=94 (my version and also the current
one
> on Europa=92s web site) specifies neither a certain torque nor any Loctit
e on
> these nuts, indicating that the nuts are assumed to lock sufficiently
> well. I remember clearly that I called Europa back then, and a very
> skilled representative of the company confirmed that no specific torque w
as
> required, just tighten it.****
>
> ** **
>
> I certainly hope that my case is unique, but you are all advised to check
> regularly.****
>
> ** **
>
> I had to remove the muffler to get to the bolt head at the back.
> Definitely some restriction to turn the nut on the bolt, but I put on
> Locktite 270 to be safe (stronger than the Locktite 243 recommended for t
he
> ring mount-to-engine bolt nuts).****
>
> ** **
>
> On the attached photo you will see the marks made with water-proof felt
> pen on the nut and the ring mount for easy detection of any nut movement,
> re-drawn after tightening. The marks not lining up is how I noticed that
> something was wrong.****
>
> ** **
>
> Fly safely.****
>
> ** **
>
> Regards,****
>
> Svein****
>
> LN-SKJ****
>
> ** **
>
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