New cables have no tension at all if properly installed. Or resistance, whatever is the correct word.
Some newer pedestals have a built in tensioning screw that works on the pivot of the lever. Some older ones use a cable brake like in the link posted.
After installing new cables I chose to use a short piece of line wrapped to the pedestal roll bar and the throttle lever with push button slider like on some eyeglass lanyards.
It's easily disengaged by pulling it down off the upturned lever. It's set for 1000 rpms when pulled up onto the lever.
And the throttle is raised to cruise
RPM by sliding the end on the roll bar up.
Only when full throttle is needed is it necessary to push the button on the lanyard to shorten its length. Or work the throttle by hand as normal for short bursts or docking
A temporary solution that works well for me, and might be permanent.