What opinion do all of you have regarding the Briggs and Stratton OHV Intek engine? This is the engined used on the Toro Proline 21" unit (6.5 hp). Towards the end of last season, the one on my Toro 21" unit seemed to be losing power which translated into a poorer cut due to reduced blade speed. It also was troublesome to start unless primed properly. Never seem to have these problems on my Kawasaki on my Deere.