Engine Zincs

Passage Maker - - Contents - Steve Zim­mer­man

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.


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