THESE ENGINES ARE FABULOUS!  I USE THEM DAILY.  ONE APPLICATION I HAVE IS FOR A GROUT PUMP I USE IN MY BUSINESS UNDER SEVERE DUTY.  I USED TO USE KOHLER ENGINES.  THE MOST I COULD GET WAS 2 YEARS OUT OF THEM.  THIS IS THE 5TH YEAR WITH THE DEK DIESEL ENGINE AND IT'S STILL GOING STRONG.  THEY ARE HIGH QUALITY, ELECTRIC START, WITH CHARGING SYSTEM.  YOU WON'T BE DISAPOINTED!  THERE ARE MANY MANUFACTURERS OF THIS TYPE ENGINE IN CHINA. DEK AND CHANGFA ARE THE BEST. THESE ARE DEK  BRAND, HIGH QUALITY, ONE INCH  CHROME MOLY CRANKSHAFT, NTN SEALS,  CRANKPIN BY VOLKSWAGON, QUARTER INCH KEYWAY     

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