Re: 1977 evinrude 85 shift linkage lenght
The shift rod has no specific mesurement (except on the extra long shaft X models) and only the barrel swivel at the top is adjustable. Turn the swivel down until gently seated and back out no more that two 360 degree turns with the offset facing forward.
You can clear the lower unit with air or water as long as the waterpump is in place.
The best way to clear the water circuit is to loosen the water hoses at the base of the cylinder heads, then apply water at the water tubes. Since the water flows in different directions, you should stll inspect the thermostat.