Spraying primer with HVLP gun, What am I doing wrong? Options

[bondo]

Ok, I tried out my new HVLP gun. I was spraying high fill primer. The output was similar to what you get from an airless sprayer for house paint. It literally looks like an orange.

Here are a few things that could be contributing factors:

1. Never used a HVLP gun before
2. 3 year old primer that says "use within 6 months"
3. Cheap Harbor Freight spray gun (no instructions besides an exploded diagram)

The primer had settled out and needed serious stirring. I did get it mixed, but it seemed thick. It said thinning wasn't necessary, but after I thinned it a little it worked better, but it still wasn't "flowing out". I didn't want to overdo it and get runs.

This is the gun I have
HF HVLP

I did like how I could spray outdoors in the wind without mega-overspray problems.