Blackstone 22"

[Lake Huron]

I've had mine for about 4 years now and its worked pretty well until last season. It just seemed like it was taking longer and longer to heat up and cook food. I did a little searching around and found a video on YouTube on how to close down the air gates on the burners. Fail. While I had it apart I took out the orifice in both regulators and one had a little buildup. I got that cleaned out and cleaned the other just in case. Still no change. As the year wore on it kept getting worse and I kinda forgot about it over the winter. I used it a couple times this year and it was really bad. Very low blue flame. I put the 1# bottle on it thinking maybe its something with the regulator or line on the trailer. Nope. Now I'm mad. I got home and tore into with full intentions of molesting the crap out of to the point of total destruction. On a side note, I have a 2 burner 27" and that thing COOKS! So I'm comparing this 22" to my 27". Dont know if its a fair comparison or not, but...
As I'm taking it apart, I pulled the burners out and all looked good there. I take out the manifold pipe that the gas line connects to and feeds the regulators. I bet I got a solid tablespoon of oil out of it. The regulators were all soaked in it as well. I cleaned all that nastiness out of everything and since I had the orifice's out .... yup, you guessed it. Im gonna bore them things out. They had a 1.0 stamped on the flat outer surface. I grabbed the drill index and the smallest bit I had was a 1/16". Guess thats what they are getting opened to now. I drilled the center holes out and it looks like they are about half again bigger than the original holes. I get everything put together and lit it off with a 1# bottle attached.
I wish I had a pic of what the flame looked like before but the blue flame was barely as tall and my finger is thick on the high setting. Now I got myself a flame thrower on high! The flame on this is comparable to my 27" now. Much taller blue flame with a nice yellow top on it. I also tested it off the LP port on the trailer and got the same flame results as the 1# bottle. Much better now!

 

[Lake Huron]

Edit;
I did find pics of my 22" flame on high and my 27" on high.
Not too hard to figure out which one is which.

 

[Jagiven]

My weber grill I take camping, I've had low flame issues. Found the issue was the regulator. I've gone through multiple regulators over the years.

 

[Kevin Cooper]

I’ve had our 22” do the low blue flame. It was because I opened the valve too fast on the bottle. Obviously that was not your issue. But my question is, can you go low now or is it way hotter on low?

 

[Bigealumni]

You might disassemble the and blow them out. Sometimes critters like to nest in there.

 

[Skyline]

My gas grill had a regulator on it there is also a regulator on the LP tanks on my trailer. Other grills which I have used have a regulator on the grill but not on the tank. I removed the regulator on the grill and it works great. I can adjust the flame from low to HIGH with the knobs on the grill. As a side note I keep the grill 20’ away from the trailer using two 10’ quick connect rubber gas lines. I’ve been using this grill for 5 years and have had no problems.