Bret wrote:Just for fun, try a 20 gram dose at setting 2 or 3. I have a bag of beans that require a fine grind, but 16g is too low a dose in the pf, and the shots pull really fast. You might be underdosing the portafilter with that weight and such a fine grind. So keep the grind setting and try 20g (then maybe 18 and 22) to find a sweet spot. If that works, then you can probably start increasing your grind size and lowering the weight (in stages).

Is your basket a straight (vertical) wall basket, or does it have a curve or angle inward to it. With a low/fine grind dose, your tamper may bind on the sidewalls and prevent a good tamp, which could also explain the fast gushing shots.

Hi thanks for your inputs.
I was able to find a perfect shot. I adjust the upper burr to 1 then grind settings to 8.
I now weigh my grinds for perfect shot and grinding not directly on portafilter to use my small scale. I am dosing around 16.5 grams.
Tamped twice using a calibrated tamper. Perfect extraction for 25seconds 2 oz. I will recalibrate of course if i change my beans.

My only issue here is my puck too watery. This is normal right? Or i should grind coarser and add my dose weight?

I'm new here and kind of late to the game regarding this post, but I watched the video on page 1 and it looks like the conical burr is spinning in the wrong direction, pushing the beans up instead of pulling them down into the outer burr.

Hi, I read your message with interest in believing that the outcome would be more positive. I have the same problem that you describe with the same model. I examined the lower and the upper burr with a microscope and there is no wear or visible damage. My smart grinder pro BCG820 was bought new two years ago. I will send the grinder to Breville Canada and give details if a solution is possible. After several hours of searching the internet, I am surprised that there is no more people with this problem. Thank you!

I had the exact same problem. One other clue is that I can no longer adjust down to the finest settings. (Couldn't get below 10 or so). However, it is unusable below 50.

I also suspect some alignment issue. This did occur once before a few months prior, but I was able to get it working again ( for a while). Unfortunately, I have no idea HOW I got it working again last time. It was pure chance and I could not repeat the process.

Most recently, I got totally frustrated and tiok it as a sign that it was time to upgrade. I have just purchased a Baratza Forte AP and am awaiting its arrival.

I know this wasnt very helpful, but wanted to chime in and say that you are definitely not the only one that has had this issue.

After approx. 1 1/2 years, i started to have problems with my BCG820 clogging - extremely low volume of coffee produced for the set time/grind time. I could see that, although Breville modified the lower impeller (from previous models) by adding a metal cover jacket, the outer diameter of the impeller is still smaller than the wall diameter of the chamber - excessive clearance that allows the grinds to slip and not moving the ground coffee down to the lower container - not efficiently as it should, thus the low production. I searched online for a fix for this impeller, but found none (only a fix for the old style impeller that is being 3-D printed). I was at the point of discarding the grinder, but because of the high dollar investment, I decided to try and fix it.

My Fix - I extended the impeller arms using pieces of a large size Plastic Tie-Wrap (Cable Tie) - refer to the photo attachments. I wedged short pieces of the Tie-Wrap between the metal jacket and the plastic part of the impeller. I had to trim the end of the tie-wrap pieces to a wedge shape and use pliers to force them between the two parts (I also used a small dab of glue on each piece). I bent these new arm extensions to follow the contour of the impeller and to make the installation easier. When installing, a small screwdriver is required to bend each arm inward, as each arm will be slightly larger diameter than the wall of the chamber. Once installed, this modified impeller will be tight to the chamber wall. I have only been using this modified impeller for a few days now, but so far it has vastly improved the output of the grinder back into the normal range. Hope that this may help someone else out there who may be experiencing the same problem. Pat Kozak