My friend gave me this O.S Max 10 engine that he found, i went and bought fuel, fuel lines, anew glowplug, 1.5volt battery and the sparkthingy that connects to the battery, but then i was wondering how do i control the speed, the is a mixture screw but no carb, i asked the guy at my local hobby store and he said it doent nee a carby, im making an airboat in my engineering class i have 2 servos but im wondering does it need a carb and how to i connect it to the servo? Any help would be appreciated!

P.S I put up two pictures of it