I have a 35 hp Briggs, 1500 hours and have only done oil changes and basic maintenance. The big block briggs are built beefier then the smaller guys, so in terms of reliability it will be better then just the v twin. To give you an idea the 23 hp v-twin is 77 lbs and the big block 25 hp is 125 lbs. My biggest gripe is the oil filter and the mess it can make when changing it out.