Sinistrafatboy; start with default Keystoker settings. Tighten the red nut to full feed and back it off 10 turns. Set the timer to approximately 60 seconds, verify this with a stop watch but don’t get too picky, 50-70 would be close enough. The timer MUST make the stoker run every 15 minutes, NO high temperature override. Using a watch or stop watch make sure your timer is working properly. If it takes the wheel 14 to 16 minutes to make a revolution that is good enough. I would not buy a new timer unless the current one was bad or if you have some extra $$ and want to look at a shiny new one. The shutter on the small blower should be less than half open, you don’t need a lot of air and at this time of the year the fire would be maintained even without that little blower, it came about mostly to prevent summer time out fires. The shutter for the big fan can be set as open as your draft will allow. Good draft could be full open, poor draft may need to be fully closed. Using a draft gauge when the big motor is running make sure you still have a least bit of draw. If you have positive pressure inside close the air shutter until it falls just under 0, indicating draw from the chimney. Set the triple aqua stat to 180 high and 160 low assuming this is a hot water setup?
With your settings set and your draft OK sit back and observe. If you notice high water temps (over 200) after extended idle periods running on the timer alone you want to start cutting back SLOWLY. I would start by cutting my timer back to minimum which should be about 45 seconds, again check with a stop watch, you really don’t want to cut back below this amount of time. Next move would be to back off feed one turn at a time unless you are extremely hot. You should back off a turn and wait a day or two to see the effect, patience is a virtue. Keep in mind that after the stoker is running a while to satisfy a call for heat that the temperature will rise and in many instances rise above the 180 high setting, this is normal and not a problem unless you are routinely seeing temperature above 200. If idle temperatures are low and you can’t get enough heat then you adjust to increase feed one turn at a time giving ample opportunity to see the full effect before adjusting more. 1 or 2 turns make a bigger difference than you may expect but you must give it time to appreciate the full effect of the adjustment.
If your timer is wired incorrectly as the thread suggests your settings sound close enough that your problem should be resolved. If not work through the problem as I suggest above. If you still can’t maintain a fire regardless of amount of time or feed there is another possibility. For the time being I won’t muddy the waters. If after verifying that everything is correct and you still loses fire because of a lack of enough coal being fed I can tell you where to look. Good luck, hope it all works out.