Aug 23, 2016 · Harley-Davidson released its new engine, ... Part of thermal management was to drop idle from 1,050 rpm to 850 rpm. The Twin Cam makes 17 amps at 1,050. The Milwaukee ... The Idle only needs to be 7 to 900 RPM with light load or AC on. Recheck timing and vacuum hook ups. Recheck mixture screw to lean best idle again. If all is still best and smoothest idle then confirm and note the final settings. To confirm settings with the engine running. Fire chief fc1900 outdoor wood burning furnace