Not the lock Down ,I believe it call the lock out cam it next to the flywheel and wont let the motor rev up in neutral,that what I found out so farIf we're on the same page it keeps the mtr from kicking up when put in rev. Won't change the running of the mtr.
Thanks that's what I needed to knowfwiw...I've got a '71 and '72 25 hp. and neither had those in place when I got them...consider who'll be using the engine and go from there..it doesn't effect the running or performance