Hi Frans
A couple of month=92s ago I noticed fuel staining from my float bowls, so
decided to replace the gaskets with the nitrile type,
My experience were they are next to useless,
They are too soft, as you tighten the bowl they squeeze out and leak far
worst than the standard paper ones, The reason I didn=92t use the cork
gasket is they dissolve in ethanol so I didn=92t want a additional problem
if
any mogas I use is (contaminated) with it,
With the nitrile gaskets leaking as opposed to weeping paper ones I
couldn=92t get the the Engine pass 3000 rpm, With new paper ones it all bac
k
to normal even with a
40C takeoff from Croatia last week
Ivor
On 27 August 2012 09:20, Frans Veldman <frans@privatepilots.nl> wrote:
>
> Hi Kevin,
>
> > Frans, My engine symptoms were not constant. Only at high power.
>
> Mine are not even constant at high power. Only temporary. After a few
> seconds the engine runs fine at full power, even at altitude.
>
> > Your
> > symptoms sound similar. Momentary drop in fuel differential pressure.
>
> Ok, this momentary drop in fuel pressure is interesting and sounds
> similar indeed.
>
> > I only changed the float bowl gaskets and that fixed it.
>
> All right. I'm about to take the carbs out for examination anyway, so I
> will replace the float bowl gaskets and see what that does for me.
>
> > Could be when the turbo pressure goes up, the fuel pressure leaks out
> > of a carb bowl gasket.
>
> Yes, but why only temporary? This is what nags me. You may be right
> about the gaskets, I will try it, but I also like to understand what is
> happening and why it is happening the way it is.
>
> > In the Rotax classes I took (Rotech in Canada who also run
> > Rotax-owner.com) they emphasized always suspecting and ruling out
> > carburetor problems first. They also told us that the cork gaskets
> > are better than the paper ones. Bob Borger sent an eBay link a while
> > back for nitrile gaskets. I bought a pair but have not installed
> > them.
>
> If I remember correctly I have the cork gaskets. I will replace them
> with nitrile gaskets if I can get them.
>
> Thanks,
>
> Frans
>
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