I have been happy with my last two briggs motors. Both walk behinds with the same engine, the first one ran well even though I hit something with it and had to straighten the crankshaft back out(can't believe that worked). The second I have on a Husqvarna walk behind that I bought for the AWD because my yard is kind of rough and steep in places. However the one on my old riding mower just blew up one day for no reason I could find. I was mowing along and it started to bog down like the grass was getting thick then just locked up. It was full of oil and everything, that is when I learned I could mow my yard faster with a walk behind lol.