Both leaks seem to be packing issues.
A few wraps of cotton string works well
if you have nothing else. Often find it
in outboards from the 20’s 30′ & 40’s.
Impellers are $18.00 plus shipping.
Check with him before ordering as prices
are not up to date.
http://martinoutboards.com/price-list/
A "Boathouse Repair" is one thats done without having tools or the skills to do it properly.