On Sun, 24 Sep 2006 06:58:51 -0400, "Jeff" wrote:

Perhaps someone can
explain if on the 4-107 the core slides out as easy as it does on the
Yanmar, and what gaskets one should have on hand

The Westerbeke parts manual and service manual are good investments if
you are a D.I.Y. er or are cruising somewhere where parts are scarce.
Sorry, my Westerbeke is a generator engine or I would give some part
numbers.