Sometimes simple things make a significant difference. Marine engines must be protected from internal corrosion with sacrificial anodes (zincs). Do you know how many your engine requires and where they are located? Heat exchangers, lube-oil cooler, aftercoolers, and transmission coolers have unique requirements with varying lengths and diameters of anodes. This transmission oil cooler has been well-marked to indicate two anodes. Note the manufacturer’s label regarding frequency. The frequency is subject to variability and only through diligent attention will you get a feel for how often to replace the zincs. The cold reality is that failure to replace a $3 anode could lead to the failure of a $30,000 engine.
The white paint will bring attention to any leaks or weeps, highlighting maintenance needs early. So often we see paint carelessly sprayed onto the hoses; but here, attention to detail shows that someone cared enough to be neat and that usually bodes well for other tasks. The right stuff doesn’t have to be complicated, just right.