Hi guys I just aquired a manco American Express with a flathead 5hp Briggs from 1989(according to the code). At first it wouldn't run, the carb and fuel tank were so gummed up it was ridiculous. Finally after allot of cleaning and a new carb I got it going and it actually went 29mph (I'm thinking that's decent for an engine from 89 with unknown hrs) My question is if I switch to a predator 212 is there much of a difference in torque and top end? Don't one much about either engine and don't want to purchase something that's not going to make a huge difference.