7.5kw gas burner problem

[gobuchul]

Did my first brew for 10 months yesterday.

I have a 7.5kw burner, run from a propane cylinder. It's the one from the Malt Miller.

For some reason it's not burning properly. The gas flow seems reduced and it burns with a yellow flame, not the strong blue flame it used to have.

Doesn't seem to be blocked.

Any ideas?

[chefgage]

On the front valve connection part there is a movable metal collar. If you move this forward and backward you get a different amount of air being drawn in with the gas. Get it lit and try moving it till you get a good blue flame.

Also its worth running a wire brush over the burner holes as this can cause a yellow flame if they are blocked slightly.

[brewpete]

we use suede brush pipe cleaners n meths in kitchens

[Wonkydonkey]

did the suggestions work ?

are you using a red bottle or a blue bottle ...propane or butane.

btw....spiders like to make there home and that can slightly block the air/gas intake

[chefgage]

Just a point to add about the air intake. As per my post above, the moving colar made my flame yellow. This happened as a few things had been piled on top of the burner when it had been stored.

[Wonkydonkey]

this explains the importance of the valve were talking about
you only need to watch up to 2mins

https://youtu.be/ZmtbMKJLUJo

[Wonkydonkey]

double posts "Doh"

[alexlark]

Just think back to your bunsen burner days!