Wondering if anyone has found or used a steering lock for a motor with a steering arm on one side only? I'm running a Mercury Pro XS 115 4-stroke that has the steering arm on just one side. I've got the DD26 transom saver, but can't find steering locks for a single arm. Is there anyway to lock it from rocking side-to-side while trailering?

I have a similar setup.  I snap in my steering lock on the one side and use a bungee on the steering wheel, turning into the lock.

Or use the bar that goes from the lower unit to the rear roller on the trailer.

A little pricey for what they are.  Would make a nice 3D print project if your into that.

 

https://www.amazon.com/dp/B00CKFUJFY?ref_=ppx_hzsearch_conn_dt_b_fed_asin_title_1