Mechanical; Propeller Shaft - Tayana -48 Owner's Manual

The use of "zinc fish" will help control the electrolytic action
affecting the components mounted through the hull. When a zinc
has greatly distinguished, it should be replaced at it will no
longer be effective. "Zinc fish" can be purchased from a marine
supply store.
CAUTION!
Remove the zinc from the water before any attempt is made to
move the boat under power. Replace the standard transom zincs
as required.
Check the engines and generators zinc anodes. Please refer to
engine and generator's Operation Manual.

2.13 Mechanical

Periodically check the control mechanism for looseness and
signs of water on moving parts, particularly the cable terminals.
Lubricate all moving parts with good quality marine grease.
Spraying the engine and mechanical parts with a good quality
damp proof lubrication spray such as W.D. 40 will keep the
engine free from corrosion.

2.14 Propeller Shaft

（1） If your boat is idle for extended periods, it should have the
shafts rotated about once a week to avoid crevice
corrosion. Schedule depends on water condition and
temperature. Higher salt content, warmer temperature and
water pollution will require more frequent shaft rotation.
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