Tommy;
The previous responders offered good advice. My 750, once set up properly starts and runs awesome. Fuel (Throttle lever) response is quicker than any Turbine I have observed operating. Mine as yours is installed in a SM F-15. Couple of points to mention.
The plug values and the Gas (powermax) values are REVERSED readings on the start box. That is to say, if you decrease the numerical value of the plug you are actually INCREASING voltage to the plug. Conversely, increasing the numerical value actually DECREASES voltage to the plug. The prior responders recommendations of value are within operating range for a McCoy 9;my choice. Remember also, increasing numerical value of gas, decreases flow and vice versa. Give John at FTE a call and you will find a wealth of information. . .information which turned me around in quick order and had me back in the air. John is a professional whose information you can trust and he will be there when you need him. Happy EPR's! Cheers, Eric