Geezer - So the fuel is mostly fresh, it has a small amount of old fuel (less than 1/2 Gal.) in the tank. So about 2 weeks ago I got 5 Gallons of 93 Octane with Sta-Bil Marine to help with the Ethanol mix. The engine runs good at idle, or low load. When I put in 4WD, she has some umph, but when letting off the throttle she tends to bog and die; did it twice today. In 2WD with the same activity, no issues.

What is the best fuel PSI I should have at the Carb? I have the regulator set to 2 PSI currently. I believe the mixture screw is currently at 1 turn out from bind.

Thanks for the link. I've been looking at Top End Performance Carb Tuningl.