Hi Gilles
I wouldn't use Silicone for oil or fuel its NOT a suitable material,
But its use for water/ glycol mix is recommended, If you use the latest Rotax
type
spring clamps it will stop any weapage due to expansion and contraction,
I have changed all my coolant pipes to silicone and after 130 hours havent
lossed
a drop, IMHO they are superior to the rubber hose supplied by Europa,
regards
Ivor
---- Gilles Thesee <Gilles.Thesee@ac-grenoble.fr> wrote:
>
> Paul McAllister a crit :
> > Some time ago someone posted a few pictures of blue silicone hoses for
> > the rotax engine and radiator. I was wondering who that was and if
> > the hoses turned out to be a success.
> >
>
> Paul and all,
>
> When installing our 914, someone had installed blue silicone hoses, and
> showed really great pictures of his engine. As the price of those
> "racing-car" hoses was high, we were induced into thinking that we would
> get what we were paying for from this race-car online shop.
>
> The result was disappointing :
>
> - Those hoses are slippery, and tend to slip out of their fittings
> despite dual hose clamps. Scary when it concern oil lines. They needed
> constant surveillance.
> - They are rather bulky, and hard to route in our really cramped
> cowling. But I understand that the Europa is somewhat larger in this
> respect.
> - They are very flimsy, and this may prove critical concerning oil
> aspiration from the oil tank when cold (see relevant Rotax SBs)
> - The soft material gets cut by the clamps we were using.
> - And most important, this multiple layer blue material was porous : it
> started "sweating" oil through the hose walls from day one on every
> line. No measurable amount, though, but enough to make things a bit
> untidy, and make us worry about our circuits liquid-tightness. Nothing
> visible with radiator
>
>
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