Kohler comand 27 hp rough idle and white smoke

I have a 27 hp koler engine that idles rough and white smokes. I thought there might have been trash in the carb. I removed the carb and disasembled it, soaked it overnight in "CARB CHEM", DRYED IT OFF WITH AIR HOSE AND BLEW B12 chem tool through all jets and put in a carb kit.The seat fit good and the float was level with the bowl and reasembeled and reinstalled back on the engine. Changed plugs, oil, and air filter and this didn't solve the problem. Checked for blown gascuts on intake manifold,also did a compression check,7lbs difference between cylenders, checked spark,good n blue enough to jolt the S__T out of my arm LOL. Engine still has a rough idle,hesitation when increasing the throttle and white smoke. MOD # CV 740S SPEC # CV 740-0019 Any sugestions on what might be my problem.