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41
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(3) Inspecting and Replacing Anti-
Corrosive Zinc
Inspect and replace the anti-corrosive zinc peri-
odically.
①Close the kingston cock.
②Drain the cooling seawater.
→ See 4.9.1(2)
③Remove the plug labeled ZINC and indicated
in the figure.
Anti-corrosive zinc is on the following parts.
*
Applied to 6LPA-STP, STZP
④Check the zinc on the inside of the plug to determine the amount of wear to the anti-corrosive
zinc.
●
Replace the anti-corrosive zinc when it has been reduced to less than 1/2 of its original size.
●
If there is only a little bit of wear, clean the surface by sanding off any corroded areas.
⑤Replace plug with new one.
⑥Open the kingston cock and check water leakage.
Part Parts No. Quantity
Dimensions D×L
Intercooler
119574-18790 1 1/2"×1"
Engine oil cooler*
119574-44150 2* 1/2"×1"
Fresh water cooler
119574-44150 2 1/2"×2"
If replacement of zinc is neglected and
operation is continued with a small
volume of anti-corrosive zinc, corro-
sion of the seawater cooling system
will occur and water leakage, parts
breakage, or accidents will result.
【NOTICE】
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