For those of you that own a big block Briggs 31 or 35 hp air cooled engine please report on the dependability of this engine. It has been out several years and Scag and Exmark say they are doing well. We have a few complaints on the forum sometimes about these engines but they seemed rare. One of my dealers in Lexington reported a high percentage of failures today when I talked to them. There is one post on the Exmark forum with a few guys venting about problems if you care to read it. This is information that could be helpful for all of us so please chime in. Please include the hours on you engine if you could. Thanks! Try to keep it to the two engines listed above because they are made by Daihatsu/Briggs and are a different engine than many of the smaller Briggs line.