hello.last year i started having problems with my kohlier command pro 27 hp.i loosing horse power at times.when i would loose horse power it would be for a while.but when the horse power would come back a bunch of white and blue smoke would come out the muffler.i figured out it was from unbernt gas.it would actually make yours eyes burn if the smoke went past your face.so i talked to a couple lawn mower repair guys.they said it was from bad fuel.so i dumped all the gas in both tanks replaced all the gas lines with a new fuel filter put new plugs in.nothing changed.so me and my brother was talking and between the both of us we said we felt it was eletrical.because there was no tapping or rapping nothing metal hitting.so i put 2 new coils on the engine.and it solved the problem the engine ran like a brand new engine intill recently.it started again a year later.so i went back to lawn mower repair shop.to git a new coil and they told me kohlier is having problems with the coils that are three points on the coil.and kohlier came out with a new coil coversion kit that the coil is 2 points instead of three points and there is eletric wiring that comes with the kit to. so they orderded the kit.ill leave all yens know when i git done installing the kit.but in doing research about this kit i saw where kohler is offering my size of engine at 70% percent off.so i wonder if thos engines have the bad coils to and that why there offering those engines at 70% percent off.