Yes, but too high an idle will cause damage to the gears in the lower unit. Every motor has a "never exceed" idle RPM for this reason. If reassembling the control box caused the idle throttle stop to come out of proper adjustment then it will need to be re set. A tach and the idle adjust procedure specific to that motor is all you need but if you're not comfortable doing it you should look for a mechanic. A lot of guys will just turn a screw here and there to try to get idle set up on 2 strokes but this is never a good idea if you want the motor to start easily and run right. It's not rocket science but there is definitely one right way to do it and a whole bunch of wrong ways.The adjustments just anchor the cable to the sheath as something to push or pull against at a known position. If putting the box back together didn’t get the cable adjusted exactly like it was, adjusting the other end at the motor will do the same thing and is a lot easier than pulling the box back apart. If it idles high, you might want to back off a little on the throttle at the engine unless it needs a high idle to stay running like some older motors.