Hi All,
I have run six 3 minute runs on a old 10 x 5 Top Flight prop. The fuel line from the muffler to the tank was black thru the first 6 runs after that it cleared up and the black is gone away. I switched to an 11 x 7 Zinger Pro and have two 3 minute runs at this point. I have an electric starter from my RC days so I let it charge overnight so it would be all set to go after work for more breakin runs. The venturi screw is blocking off approx. 1/3 of the opening at this time. The gas tank is a Great Planes 4 oz. clunk non-uniflow. I put my finger over the venturi and rotated the prop once. This thing sucks great. No big deal it's just kind of weird, when choking a 2 stroke the piston is going up and when choking a 4 stroke the piston is going down. Attached battery and rotated the 2 inch spinner backwards against compression like I used to do on my RC ships. Not violent, just a casual rotation and the sucker fired off no problem, wow this is exciting. Ran out the 3 minutes and gassed her up again. I didn't want to wait to long because I wanted to see if it would start hot. Finger over the venturi again and one rotation or less. Attached the battery, rotated the spinner backwards again and boom it was running, how easy is that? Picked up the Fromeco Tach and pointed it at the prop. We're running an easy 8800+ rpm, thats with an 11 x 7 Zinger Pro folks and the thing is pulling like a mad race horse. Kinda neat the plane remains pretty clean with the muffler pointed down, I guess I could point it down even more but I like the way it looks now. The weather looks good for this week end so I will be able to get the first flights on it. Makes an old mans heart jump. Will keep you posted on how the flights go........Hey gotta go, it's probably cooled off by now and ready for another run.......I think I hear it calling me.......Later
Hey, I have a question...All my passed 4 strokes had crankcase breathers with a nipple for a piece of fuel line. This engine has a nipple coming out of what looks like the cam area and I have yet to see a drop of oil materialize from it ? is this normal ?