If you have a perkins
4.108m lowline there is a pencil zinc in heat exchanger
that could cost you money
if not replaced regularly. I'm posting
this because its not listed in the 4.108m owners handbook(there's even a heading of electrolytic protection that doesn't mention it), the shop manual or many boat
manuals(including mine). I found it in the parts
number manual. Not finding it earlier cost me $350 for heat exchanger
. I asked about it earlier on cf and silence was deafening.