Bought a used TT pro .61. Everything looks to be in good condition. Good compression and all. Guy said he ran it before he sent it to me. Anyway here is my problem. I took it out today, it fired right up seem to transition o.k. so I got ready to take her up, after she ran for a minute or two. On the runway as I gunned it for takeoff she cut off. Brought her back to the starter and started her up. Then she was loading up on the idle. When I was transitioning the throttle up it would cut off. I tried to lean out the low end a little, but I had my father in law and his brother fiddling with the high end and telling me this and that on the low end. Bottom line this thing is all out of whack now!!

What high end AND low end settings should I start with before trying to tune this thing again, WITHOUT their help I might add.

I know for most engine break-in the recommendation is 2-2 1/2 turns out on the high end, but what about the idle screw, where do I start fresh ?

twilli77, I just went and checked mine and the low end is turned out 2 turns. Start at 2 turns on the high end also, hope this helps.

Twilli77, Start with the high speed needle and run it wide open and adjust it peak rpm, then richen it until you get about 300 rpm drop. Then let it idle for about 30 seconds and pinch the fuel line. If it revs up, it's too rich. Adjust the low needle about 30 degrees in.(clockwise) Re-pinch the fuel line again to check. If it dies when you pinch it, it's too lean, turn the low needle out (counter/clockwise) about 30 degrees. You should get a very slight rev up when you pinch the line, but not much. Re-set the high speed needle one last time. Check the idle for about 30 seconds again and see if the transition is ok. That should get you up and runnin..
Suptter

Danny,
Do ya'll still fly at the Cave Springs School for the deaf? Mark Hopkins and Bill Taylor still around. I learned to fly there. Lots of great memories. Super bunch of guys when I was there. 1985-91

Alas, I finally sold my TT.61 after several years of off and on useage. It was a bear to adjust and even then it wasn't totally reliable. I would replace the carburator with an OS or Perry. Then not use a fuel tank larger than 14 ounces with the tank's centerline placement in direct line with the the carb's main needlevalue.