Hi Dennis, welcome to the site and congratulations on your purchase. For the chains most people recommend PJ1 black label. Here is a thread on that subject:
best lube for chains
As for the outboard, several people on the board have ran them. Search the argo forum for more info but one post that stands out in my mind is from Silverbullet75. He did a comparison for water speed with and without the outboard and he really didn't gain that much speed. Here's the post:
Argo Open Water Speed With Outboard
Hope that helps and again, welcome to the site.