I have an O.S. .40 LA engine; I recently put it on a test stand to run it and check it out. After I was done I was surprised at how hot the engine was. I've never seen this before, but I am new to the sport. Anyway, the only things that weren't hot were the prop, the remote needle valve and the throttle arm. Even the spinner was hot. I coudln't touch the carb. either. All my other engines are all BB and are the newer style engines with the tri-metal and none of them get this hot. I even have an old Magnum XL BB engine and it runs like an ice cube compared to the LA. I'm running Power Master 15% in my engines. Isn't the LA a bushing engine? Is this typical? I'm all ears; educate me please.