I am thinking about buying a TT Pro .61 for a Sig 4 * 60. Posts I have read (some fairly old) talk about carb. problems etc. I see from the new info. that they claim that that it is with a "new improved carb." I would appreciate any comments on this engine, especially related to how the "new carb." works...Fred 123 [&:]

I have a TT Pro 61 that is about 2 years old. I had some transition problems initially, but now that the engine is broken in it runs great.

I have had the 61 pro and fx, both equal in power and performance as far as I feel.

If the low speed needle is not set carefully, the TT .61 Pro can stumble a bit in transitions, but getting it right isn't very difficult.

I have 3 TT engines and the carbs on all leak at the needle valve. I sealed this with a piece of fuel line and they work great. Mine are older engines and I know TT made a major change to correct this problem. The new carbs will fit the old engines should anyone want to update.

Had my TT 61PRO for about a year now and I'm very happy with it. It lives at the front of my 4*60.

Had to adjust the idle setting when I got it but haven't touched it since. Would definitely by another TT PRO.


Terry

My TT 61 Pro is at least 3 years old. I have no idea if it has an old or new carb.
When it was pretty new it was hard to start, had idling and transition problems, and the high speed needle was very touchy (a click or two either way and it wouldn't run). All of the "gurus" said it was too rich on the idle needle, loading up, etc. We (my brother and I) kept leaning it and several brands and types of plugs and I was about ready to toss it and buy an OS. One day we went to the field early, determined to fix it or toss it in the trash. We richened the low end a lot, probably a full turn, and started it. The high speed then needed major adjustment. We kept richening the low end and retuning the high end through several iterations. Now it starts easily, idles forever, and transitions pretty well. I've seen engines that have better transition, but I have full confidence that I can abort a landing after a long glide without fear of it quitting.

You might want to consider one of the .91 size engines as they are the same size and weight as the tt .61. The super tigre g 90 is about 20$ more expensive and the magnum .91 is about 50$ more. There are other engines in this category. They will turn the 4*60 into a terror.

First time I started my TT61 it started after 2-3 flicks. The engine is lovely. I got a great idle and wonderful transition. I do not use an electric starter on her and she always fires up nicely. Just prime the carb with a couple of drops of fuel and it will flick start. The TT61 is easy to tune too. My TT46 hand starts with a back flip by spinning the spinner.