I just started to put my all grain setup together and I thought of trying my burner and keggle out... to see if the burner is up to the challenger. My burner is a old 66 000 btu bayou type...so I put in 12 gallon of hot tap water (planning on doing 10 gallon batchs and the hot tap water is to get as close to mash temp). So I Light the burner... adjust to its max flame and let it go... finaly 1h:30min a start of a rolling boil begins... to make it worst the keggle was covered to get it boil. So should I get a new higher btu burner? or do I need to be patient? I think a smaller btu burner will burn more propane to get 12 gallon to a good rolling boil then a bigger burner. What do you guy`s think?