I pulled this off a motor recently; what is the purpose of ever installing this? It holds the engine in the straight position, what would be the application? An example link is below.
What size motor was the lock on? Was it being used as a kicker?
My old Yammy T9.9 kicker had a steering lock to while the new one doesn’t. Since kickers with remote steering are set up with zero friction, the lock held the motor in place while towing. Instead of using the lock, I would leave the tie bar to the outdrive hooked up while towing to prevent the kicker from flopping around from side to side. Yours might have another purpose though.
What year 70? I’ve owned several and have never seen a steering lock on any of them. Right now I have an 80’s 70 which I’m cannibalizing for the TNT unit but I don’t recall it having a lock either. If the monsoon rains ever stop, I’ll go and have another look at it.
It attaches to the port tilt tube, then to the extension off the stern bracket, if you look at the ebay link you’ll be able to figure out how it goes on (not complicated).
I actually have a few of these things lying around here from motors I break down before they go to the big lake in the sky.
Oh well some day I’ll find out why these were made.