Gents,
Glad I am not the only one who likes the Tower and GMS engines. I have the T75 on a Senior Telemaster and the G76 on a Tower Hobbies Uproar - 60 size. Both are about 5 years old with minimal run time.......less than 15 hours on each. The Tower runs like a top. As long as there is fuel in the tank, the only things that stop it are the earth and the throttle cut switch....the latter of which is not always a given. The GMS 76 was running great till this weekend. ALL things being the same as they ever were, she has started choking on me on throttle up; i.e. once warmed up, I let the engine sit at idle for 10-15 seconds. I apply throttle and the sputtering and spitting starts. If I didn't react, she would die. After adjusting both needles and going through the battery of tests like pinching the fuel line at high speed, blah blah blah, everything seemed to be ok. It was a windy day so I wanted to make sure she would stay running when it got off the ground. I had my buddy hold the plane vertical and I gave it the gun. The sputtering started again and she would cut out. Tried this several times after minor adjustments and all ended with pretty much the same result.

I am guessing that some of this is normal but my engine skills are the weakest of my intellectual arsenal. Would appreciate some thoughts and/or suggestions to remedy the issue. I may just start with a glow plug change to see if that has any effect. Thanks in advance for your input.