Hi Bob , I do not know that boat . But I looked at the ad , couple of things got my attention . I see now why you asked about the 150 genny . and I have no idea how the boat would handle with that sail , my guess is, for SF bay you might want the original yankee . The fact that the boat has been re-powered is very nice , I would check that you still have adequate room to service the stuffing box . The boat is certainly optioned out like the hot/cold pressure water and reefer . I would like to know the hull # , reason for that is early W 28's had no boomkin and other stuff that was corrected on later models . Check out Marina Fay http://www.westsail.com/forsale/marinafay.htm or if that doesn't open up just go to Buds site and give a good look at the aft , see the hoop over the tiller ? Also the rudder has been enlarged on the later models , you can see on Marina the smaller rudder . Also on later models they added a taller mast and more ballast . But it looks like the one you are looking at is a later model . Good luck .
