I have a 2016 Yamaha F90 connected to a Teleflex rotary steering system. When the engine is not running and I'm moving around in the boat, the outboard flops side to side. In other words, if I move to one side of the boat making the boat lean, the outboard will flop over to that side. It's aggravating because it's hard to keep the boat going in a straight line using the trolling motor. I've been hooking a bungee cord to the steering wheel and the gunnel to add some stability. There does not seem to be anyway to add tension to the steering either at the outboard or the helm. I'm wondering if a mechanical "No Feedback" rotary steering system will solve this. The hydraulic systems are more money than I want to spend. Thanks for the advice!