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Most of you fellows should look up the old pattern oriented G2300 articles of some years ago. You could learn a lot about the G2300.

The G2300 is not a high revving engine design. It certainly is not a 3D engine. It simply isn't ported for that kind of throttle response.

The pattern folks determined that the 18x8 was perfect for their version of pattern flying. Revving the engine any higher did not yield good results in terms of thrust generated.

In order to obtain a really crisp throttle response from this engine, it will need to be fitted with an accelerator pump, or a much smaller cfm carburetor. A 17x8 is not too small of a prop, but it is moving away from the 18x8 optimum prop.

Engines that quit after being tuned successfully on the ground have a fuel system issue, not a prop issue. The 18x6 diameter/pitch is not causing the problem. But its balance and or sympathetic resonance of the airframe may be causing fuel foaming problems. Remember, you cannot see fuel foaming problems with the model sitting on the ground. It must be checked for foaming with the model being held off of the ground by its wing tips. Even then, visually spotting fuel foaming can be tough, however the engine will let you know that something is amiss without your having to actually see foamed fuel in the fuel line.

Now, I am sure that everyone is experienced enough to be doing a fine job of static balancing their props, so I'm not insinuating that anyone is falling down on the job in this regard. However, dynamic balancing is another thing altogether. One thing that can make a difference is to true up the prop hub so that the blades of the prop track properly. How many of you do this? I don't either, but I do check for blade tracking on problematic props and then replace the prop if it is too far out. That often makes the difference.

There is nothing "wrong" with the G2300. It is now a housebrand engine and the Chinese manufacturing savings is being passed along to the consumer. It helps Tower gain consumer loyalty. It worked for me. I now own more ST engines than I have ever owned. Don't let the low price fool you into thinking that it is inferior. It is not. However, it is dated and is not the ideal choice for 3D flying in its stock form. Most two-stroke glow engines fall into the same category. If you really want to make this engine perform, spend the bucks on the Jett made parts for this engine.