Zincs are located....
Lauren,We have a 1998 H376 with the galvnic isolator and a zinc. I am quit sure that the same zinc will work for you. It is an split elliptical sphere and it is located on the drive shaft. I believe it to be between the stuffing box and the cutlass bearing.West Marine calls them "Streamlined Collar Anodes" according to HOW your shaft size is "?". I would bet that you have the same shaft size as listed for our 376 at 1" Diameter. 1" x 2-1/8" long x 2-1/8" O.D. in West lists @ $8.29 part #110254. I have seen boats with multiples on their shaft. I think that this is better for shaft balance, if you have the room. I would located the split on the second anode at 90 degrees from the first anode.Have fun,Mike DMedia, PAs/v SerenityH376