Can a 1985 Yamaha 8hp be locked to just go straight?

[Baywind]

I didn't explain well in the title. I want to be able to motor a longer distance than I have done. I want to have my 8hp locked so it only goes straight and doesn't swivel side to side. I could then steer with the rudder if needed.

There is a hole in the handle that I think I can use to connect a rod to the stern and lock it in, is this how it is done?

[lickingcardboard]

the hole in the motor tiller might have been to put a controll rod to the tiller of the boat so the motor will help in turning the boat?

check for a set screw on the pivit shaft.

[Faster]

There's usually a friction adjustment somewhere in the mount/swivel arrangement as cardboard suggests.. I'd put just enough friction to keep the motor on track but still enable turning if necessary.. despite the many disadvantages of outboards, the ability to turn the boat more aggressively by using prop thrust is a distinct advantage that would be a shame to lose.

Failing that some kind of line on the tiller handle that could be quickly released might do the trick.