Incomplete fuel combustion?!!?
 

I've just change my fuel brand and I'm getting a strange behavior from my engines...

I'm getting fuel drops coming out from the exhaust pipe whatever the engine rpm... I've got power, the engine temp is OK (around 120-130°c)... so what could be the problem?
Should I decide to lean my needles and the engine start to sound... lean...

(The fuel I'm using is a 30% nitro fuel used into 15cc Heli engine)

RE: Incomplete fuel combustion?!!?
 

if you usually burn synthetics and now have castor in the mix that may be it.

RE: Incomplete fuel combustion?!!?
 

No, I'm only using fuel including synthetic oil...
Some are telling me that it is just like that... with that brand of fuel...

RE: Incomplete fuel combustion?!!?
 

Not all synthetics are the same some will not vaporize and you will have droplets of oil in the exhaust stream. This is good, vaporizing oil means that the engine cylinder could be starving for oil becase the oil is flashing away in the cylinder.

RE: Incomplete fuel combustion?!!?
 

Hi, dogg
The drops you see is just oil which it is normal to happen.I don't know the type of your engine, but, I think, the temps that you run it, is too high.For the YS 91SR is about 100C and for the YS 91ST about 107C.