My 12.5 hp B&S model 281707 type 0411 01 is all sorts of messed up , still runs but want to replace it with a B&S model 284h77 type 0125 e2 but i can find no info actual dimensions or just an ez answer on if it would be a good replacement , seems they cant be bothered to archive their engines manuals at briggs and Stratton site or any info on earlier models , any info on either model would be greatly appreciated