RE: bad engines
OS doesnt peel liners anymore. Those engines that did were the older SX and FX engines, They are now two different models past them.
Fox engines are great also.
All engine brands have had problems. some people try one brand of engine, get dud and then bad mouth them forever lol. Each brand has their faults. OS and Thunder tiger are near the top with the sport engine price range. next down for me are the magnums and ASP's. These four brands all run well.