A control cable makes the connection between the motor and the handlebars. Which cable you need depends on a number of aspects. The length of the boat, the shape of the boat and the power of the engine.
Add together A) the length from steering head to the right, B) length to the transom and C) the length to the center of the outboard motor. Add another 150 millimeters and you have the minimum length you need.
At WorldOfOutboards.com you will find complete do-it-yourself packages for a mechanical steering system. This includes a mounting kit, steering cable and a steering head. The packages cost €200 to €250, depending on your outboard motor.
You can buy a steering cable at WorldOfOutboards.com. With us you will find complete do-it-yourself packages for a mechanical steering system. This includes a mounting kit, steering cable and a steering head.