These engines are usually to be found fitted onto ride on lawnmowers and garden tractors. They are overhead valve and will have a rocker cover with the letters OHV embossed into the front. They will usually have a sticker stating I/C Quiet, I/C Gold, Diamond Plus or Intek displayed on the engine cowling. The Model, Type and Code numbers are either on a narrow plate rivited to the top cover, stamped into the cover just above the rocker cover or on the edge of the rocker cover itself. Their model numbers all begin with 28????.