Both plus mud. Inland and coastal waters are more acidic than they used to be. Galvanized chain looses its coating quite quickly. Acid water running through very hot diesel
engines might do a nice chemical cleaning
but that also means some to of the iron is disappearing.
- - Debris is not much of a problem as a good sea strainer will keep out stray logs
, telephone pole and fish
. But depending on how oftern the engine is run, barnacles
larve, slime and sea grass can get past the sea strainer.
- - But mud is the big one. Most anchorages
tend to be located at the outflows of rivers, which when a tropical rain storm occurs massive amounts of mud engulfs the anchorage. Over time the galleries in the engine become coated with more and more mud. I rebuilt a Ferryman and it was a trick and a half to get the mud out of the galleries.