ORIGINAL: boex
I will continue following the directions on the manual (pinch/release, that sort of thing) and hope I see improvement in the next couple of gallons, praying in the meantime I won`t get any dead-sticks.
If I don´t succeed with the super tiger way then I will have no option but to adopt some of your suggestions:
1 Change glow plug to an OS
2 Install fuel pump
3 Replace carburetor
4 On board glow system
5 Use 15% Nitro
6 Change muffler
7. Throw in the towel and get a spanking new OS Engine
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The more running time (rich) the engine acquires, the better it will handle, regardless of which carburetor is installed. All model engines, especially ringed engines, need some run-in time. This is perfectly normal. Model engines are not plug-n-play, regardless of the marketing hype. OS comes about the closest, but even they improve with time.
Get a stiff upper lip, stick out that chin and mount this turkey on a bench. Then run the dickens out of it. You will notice when it breaks-in to a suitable level because you will notice the engine's attitude changing and the mixture richening to the point where you will have to lean it in order to keep it running where it was. Everyone goes through this (on the average). Super Tigres are/were made of hard metal. It takes a while to wear hard metal. That is what is taking so long. Look at the good side - once you wear this hard metal into final position, it is going to last a long, long time. If you want to pay someone else to do this kind of finishing work, buy the OS instead. But it really doesn't take THAT long to do it yourself. Just don't do it with the engine in your model and the engine down on the ground. If you have to do it in the model, find a table to set it on and to which you can fasten the model securely. An hour or two is a long time to hold a big model with a G2300 on it.
Do this and you will be amazed at how much easier it is to start and adjust. And don't forget to run fuel with a tad of castor oil in it, such as Omega, Wildcat, etc. It does help the engine mellow out.
I'm not saying that a Magnum or OS carb won't help, but you might find that once broken-in, the engine mellows enough that you won't want to spend the extra money and that the stock carb works well enough to fly your models safely. If you are going 3D with this engine, you might want to go with a smaller version of the aforementioned carbs. Get that air velocity up high enough to throttle well at part throttle. Besides, the only time that a really big carb helps develop more power is when you are revving hard with small props. Good luck.
Ed Cregger