Carburettor Leakage

[RFguy]

Skippy see if it occurs with a low vapour pressure fuel such as AVGAS LL100. Put some additive in it (Decalin runup) if concerned about buildup just for one tank of fuel.

[skippydiesel]

10 hours ago, RFguy said:

Skippy see if it occurs with a low vapour pressure fuel such as AVGAS LL100. Put some additive in it (Decalin runup) if concerned about buildup just for one tank of fuel.

Thanks RFguy

 

Is this with reference to Nev's possible fuel bubbles/boiling?

 

I see the logic  - floats may perform better thereby more reliably keeping fuel level below "spill" height - no fuel in catch cans.

 

 As I have no intention of using AvGas (except when ULP 95-98 unavailable) I think I would rather go:

• Monitor under cowl temperature - have the system in place.  Up to now has just been for the occasional look/check - will take a more systematic approach over the next few flights. Findings may guide next step(s)
• Check/adjust clearance of brass armature/float bracket (float acts on, to open close inlet valve/needle) - should be 0.5mm ("Spacing on the 912 Series: 0.4 to 0.5 mm").  Possible manufacturing assembly error.
• Check float needle valve condition at the same time as above