RE: Question about gas to oil mixture........
Barring OTHER problems with your engine. This is how you tune. If it runs fair start with the HIGH side needle. FLY for five mins of so and if the plane surges at full throttle it's too RICH and will need leaning , if not land and check the temp with a quality temp gun. it should be around 195 or so. if it's more than 195 richen to cool the engine or increase the airflow. if it's way below 195 you need to lean a bit . usually on the low end i like to run very SLIGHTLY rich the low end will perform badly if it's even a little rich or a little lean. If it gurggles (some call this four stroking)at low rpms in FLIGHT it's a little rich , if it stumbles then catches up or stumbles and dies it is usually LEAN. adjusting one will slightly affect the other. but in saying that if you have the top end very RICH it could be flooding over to the low end. So like I said start with the top end FIRST