Those parts are captured below the powerhead. I can’t remember what year, but in the late 60s, the 6hps were changed to a split shift rod with the coupler which eliminates the need to pull the powerhead for an impeller change / lower unit service. The lower crankshaft seal components remain captured, but the roll pin must pass thru a slot. This makes alignment of everything when it goes back together somewhat challenging. It has also made for a lot of broken pins.
Being that this engine has had little apparent use, as long as care is exercised upon reassembly, it us a reasonable assumption in my opinion that the seal components are OK and will be serviceable for some time to come. It is often just as easy to pull the powerhead even on these motors for service, however, and it reduces the likelihood of damaging the carbon seal upon reassembly. It also give the opportunity to inspect the components. The only downside is that you will probably need to replace the powerhead base gasket. I have done it both ways, but on a motor I don’t know the history of, I usually pull the powerhead and replace the O-ring and the seal gasket just so I know I’m starting with new parts. I’m not suggesting this is necessary, it is just what I usually do for my own peace of mind when doing the mechanicals on one of these.
-Ben
.
