The steering cable is a cable in a sheath...the exterior sheath needs to be constrained at the steering column and the rear of the hull. If the sheath is not constrained properly the whole thing will move and not allow you to steer one way or the other....I had this issue with my 2017 Spark 2UP.
Take a look at the rear of the ski where the steering sheath/cable passes through the hull.....there should be a 2 piece locking plastic retainer that wraps around the steering sheath, the plastic retainer has a molded in ring on the inside that mates with an indent in the sheath to hold it (retained)....if the steering sheath/cable is past the retainer then that's the problem.....the 2 piece plastic retainer also holds in a couple rubber washers to form a watertight seal around the steering sheath, so don't lose those washers. The plastic retainer could also be busted which allowed the steering sheath to push past it. It is tight working quarters in there but it can be fixed without removing the jet pump (but much easier if the pump is out of the way).
