Yes, I tried without the belt once just to see on my 19 footer. On a low plane it took both hands to stay straight. Wanted to go one way. I assume to port.
Those lines are on pretty tight, you will need line wrenches to loosen and reconnect them. Regular wrenches will round off the flats on the fittings. Cheap Harbor Freight (SAE not metric) line wrenches are fine for that.
Once you have the line replaced put some fluid in the reservoir and without starting the engine run the steering back and forth a number of times. Check the fluid every so often and keep it to the proper level. You will probably need 1 or 2 quarts. When it stops taking fluid you can start the engine. Turn the steering both ways with the engine running too, although I'd be careful if doing that on muffs. It would be bad to drop your muffs and ruin the impeller. So in the water is better.
There may be some whining until the air is out of the fluid. that's normal.
If it doesn't go straight after that let us know. There is a balance adjustment on the power assist that can be centered.
