Is it difficult to turn the wheel while on the trailer or just at high speed?  The O-ring should add slight drag, but not substantial resistance.

Post a pic of your pump and steering arm. It should get harder but not impossible. Rack and pinion? Rotary?

Has anybody heard that you can fix a hard steering problem by replacing the nozzle o-ring on a place diverter?

Sounds to me like you need to replace the bushings and the o-ring.

If the o-ring is worn, or the wrong one, it can jamb with the pressure.

Make sure it is centered as well. Too high or low will cause some weirdness also.. What kind of angle is the cable at? You may need a clevis on the attachment point. (If you don't already have one).

Also, is this a new problem? Or a day one thing?

GT

How are the pin bores in the droop and the nozzle?  If they are egged out, pressure against the nozzle could cause binding.

Sent from my SCH-I535 using SoCal Jet Boats mobile app

Cable could be going out.
I replaced mine from the wheel back.
Turns like a dream now.

-beerjet-