What is considered the most powerful and popular engine to replace a 11 hp B&S?

It depends on what your building. If your building a racing or fast mower you should go with a twin or opposed. But if your building and offroad mower it better to have a single, because if you have a lot of weight up front (unless its all wheele drive) the front end will sink in the mud.

skully wrote:

Well everyone i am currently working on a lawn tractor and im torwards the end of tear down and it's getting close to time to put her back together but with a few upgrades . Previously i was going to try to find all the parts to the 11hp briggs & stratton and rebuild it, but then i decided i wanted a litle more power and the 11hp wasnt worth trying to find all the parts for and then rebuilding it . So this is where im at now. Now heres my question whats a good , Popular and Powerfull ( well when it comes to lawn tractors anyway), engine to replace it with? And maybe what the engine comes out of? Sorry for the long intro to question.

well me personally I would go with a v-twin vanguard I have one its 14hp v-twin works awesome