When does the motor quit?

when does the engine quit

I've pumped back fuel plenty of times and reused fuel as well. I've never put in After run oil, I did add some Castor to my Omega mix for some extra protection but have recently started using coolpower with no castor at all and I still don't add after run oil. But I fly every weekend and sometimes on weekdays.

I've never had a dead stick landing and i've run about 3 gallons through this engine.

I was running rich, really rich on the Low speed needle side of things. Since I've adjust that, The engine found another life. The pickup from idle is excellent, I can let it idle for as long as I want and it picks up rpms right away when I increase throttle.

I no longer have the varnish on my parts I used to get by running rich with castor fuel either.... Just tune it right, I get the feeling it's the tuning.

It hasn't the last two flights so I'm hoping I've got it taken care of with the baffle removal and hi-speed needle adjustment.

That baffle may have caused some foaming with the extra pressure. Hope it stays running for you. 'Good luck

Thank you!

It shouldn't affect the cost. I'm not going to discard any un-used fuel, just keep it in the tank of the airplane between flights.
What I am saying is I'm not going to contaminate the new $20 plus dollar a gallon fuel with the gunk from the muffler anymore, just as a precautionary measure.
It's just not worth taking the chance in my opinion.

While I doubt that moisture contaminated fuel from the plane's tank back to the bottle is actually causing your trouble (I fly in one of the most humid environments in North America, return my unused fuel and never deadstick), don't leave it in the plane's tank. That tank is vented and it will accumulate more moisture and you will have moisture related problems. Instead, consider keeping a second fuel jug on hand to pump it into, one that can be properly sealed. The fuel left in the tank can also cause corrosion of the brass fittings inside (ever notice that green residue that forms inside old tanks, near the clunk?). If I were you, and felt it necessary to segregate the used fuel, I'd carry a small pop bottle or something to keep the unused portion in between flying days. Coke bottles with their standard caps work quite well for storing fuel. Just rince'em out very well with either fuel or rubbing alcohol before first use to get the last vestiges of pop out.

J

I get the Heebeegeebee enough as it is transporting a 1/4 gallon of nitro in my trunk

Plus if you leave fuel in the tank, it'll leak through the muffuler from the variouse angle you'll
handle the fuselage during transport and storage.
well, if it makes it's way to the muffuler...the exhaust port is right thar.

Just buy after run oil. it's only $2 and it'll last a while.

Are you allowing the overspill to exit the muffler. If so, what don't you take the pressure line off when you are filling and that way any fuel that is overflowed doesn't go through the muffler to get contaminated with the exhause residue. That is what I do. I have a pint jar that I soldered a brass fuel line on the lid and use that to catch the overflow. I then dump that back in the jug.

The fuel lines to my airplane are fairly easy to get to, so what I do is take the lines off of the carb and muffler and connect those lines together using a brass tube making it a closed system. I don't put old fuel back into the jug this way. Then I start my engine and run it dry. I don't put after run oil back in, but perhaps will start doing it now.

No, I just pump it back into the storage tank. There's a filter on my pump.
Yes I notice particle on the bottom of the jug sometimes. But the line of my pump dosn't reach that low anyway.
I just pour it into a cup and let it settle.

On some models i can connect the intake and muffuler line . On other models it's not that easy.

I also replace or slice the line every so often becuase the tubbing expend and don't fit tightly around the barb from
taking it off and on.

No, I always disconnect the line to the muffler when I'm adding fuel to the tank. Want to unleash the potential of my little trainer State of the art, baby!

Hi!
I have never in my 33 years flying pumped back fuel! Totally unnecessary!!!
Over here in Europe many of us use 15% or less all synthetic oil like Motul "Micro" , Aerosynt 2 and 3 from Fuchs in Germany and many other oil companies and these oils contains rust inhibitors.

As I'm responsible for our clubs 3 training airplanes, were we use 15% all synthetic oil and 5% nitro, I have never during the last 5 years never seen any rust in the engines what so ever. These engines are just fueled and flown and never do I pump back fuel after a flight. The planes are stored in a metal arms locker between flights and stands there,some for months between flights, and never any rust.

Many times in the past when people ran Castor oil and hadn't used their engines for months or years the rust problem was severe in all engines, not to speak of the problem with Castor oil oxidizing, gumming up ball bearings.

As I never use and "special" after run-oil. I do now and then oil in my engines using ATF oil or just the same all synthetic oil I mix in my fuel.
And I pour it in! Don't be bashfull ! Pour in plenty of oil into the carb! A tea spoon is nothing! Synthetic glow fuel oil or ATF oil doesn't attack O-rings or silicon rings in the carb.