I would not reccommend Velleggia's, Chiapparelli's and Sabatino's they are over-rated tourist traps. I have stopped going to the aforementioned restauarnts about ten years ago.
When my IAC went bad last year it would beep when I throttled it up, at idle it was fine, no alarms. My symptoms were different than what Bob has described.
I was in a similar situation this year, I removed my old zinc's which had some had markings on them or the UPC sticker. If not, you can measure the width of the trim tab zincs which are probably the R-3 type, also measure the bolt spacing on the transom zinc should be either 5" or 5-1/2"...
Walz:
I can't believe you are considering leaving the Goose? You just can't beat the location and people at the Goose. There are other service options within close proximity. I hope you decide to stay.
I am curious to see if anyone uses Yacht Brite products; Buff Magic and Pro-Polish. I look forward to hearing your experience with their ease of use and performance.
Thanks,