jpeac2 wrote:2. Over thanksgiving we had to refill maybe 2-3 times and were having trouble keeping it at 300 ish. Doesn't that seem odd?
Odd, yes, though I have heard variations of this any number of times. While BGE suggests simply brushing out ash/coal build-up from the firebox every once in a while and does not seem to address removing the internal components for complete cleanup, in almost every case ash build up interfering with air flow is the cause of temperature stability problems.
Remove all the parts, cooking grid, plate setter, fire ring, fire box, you will be surprised at the amount of ash build-up under and around the fire box. Air flow is key to a happy BGE, ash build-up impedes air flow.
When reassembling make sure the vent hole in the fire box lines up with the lower BGE vent.
I never reuse charcoal, ever. Charcoal is an absorbent, it soaks up moisture, grease odor etc. Used charcoal that looks fine may, in fact, have absorbed enough moisture to cause it to burn unevenly. A 20-lb bag of Royal Oak lump charcoal is $8 at Berger Bros, a large BGE will run 12-hours on 5-7 pounds, you really want to chance it for $2?
Gasket wise, my large BGE gasket burned off almost immediately, took me a few singed eyebrows to get the BGE "burp" down, and I have not replaced it. I have grilled, smoked, high heat roasted, done dozens and dozens of pizza at high heat no gasket, no problem. No problem getting 12-14 hour low slow burns with a full load of lump either.
Far as how long a large BGE will go at 750, not sure, but at my pizza sweet spot of 650 I have been getting 1-1/2, maybe slightly longer, with a full load of lump. I am opening and closing the cooker for multiple pizza during, timing would be different if you left the lid closed. What do you intend on doing at 750 for over an hour?
Two excellent resource web sites, one with info, the other with useful aftermarket add-ons, in particular the Woo3.
http://www.nakedwhiz.com/ceramicfaq.htm/http://www.ceramicgrillstore.com/If you take nothing else from this post please take the BGE apart and clean it completely, you will be surprised at the difference.
Regards,
Gary