Yes, run a hose to the out drive, you have a Alpha1 out drive with a 470 mercrusier also called a 170 great motor just a few timely tips. change your intake (manafould ???) every four years "no questions about it" and the water pump impeller in the out drive every two years, and this is way you run a hose to the out drive because you will burn out this rubber impeller. If you are handy install a fresh water wash out and run a y hose to both the wash out and the lower unit. Take care of this motor and it will not only take care of you but will give you power and save you gas money at the same time. enjoy it.
Great Eastern Mech.