A control line engine has NO throttle. In RC, our engines have a throttle, and we use it on one of the RC channels to control engine speed for maneuvers, take off, landings. In control line, they go full blast the entire time and then land when they run out of fuel (typically...not always)

Can't tell for sure, but that engine kinda looks like it has no throttle...is that what you want? Are you starting out in RC? If so, thats the wrong engine....unless you want to land dead-stick all the time..

[Oh, I think I do see the throttle over there on the other side... OS LA is a great engine to start out with]