Electrolysis Protection; Engine Alignment - Regal 3760 Owner's Manual

ELECTROLYSIS PROTECTION

Sacrificial zinc anodes usually found on the outdrive
housing, trim cylinders or propshaft to protect softer
metals exposed to the water. Electrolysis attacks the least
noble metals first. Because zinc is a less noble metal, it
will decompose before other metals. Check these zinc
anodes periodically and have them replaced when they
are 50% gone.
Zinc is also used to protect metal that is exposed to
saltwater. The salt causes a galvanic action that
decomposes metals.
VOLVO
SACRIFICIAL
ANODES
Cosmetic Care & Maintenance

ENGINE ALIGNMENT

Stern drives use a rubber splined hub to which the stern
drive driveshaft is attached. There is an alignment
specification between the engine and outdrive that needs
to checked periodically normally when the outdrive is
removed for service. A shaft is inserted in the transom
area and the alignment can be determined by the spline
image left on the tool. The engine mounts are then adjusted
to permit a spline image 360 degrees around the alignment
tool. This specification should be checked after each 50
hours of operation or if the vessel has run aground or hit
a submerged object. Alignment should be checked by a
Regal dealer or marine professional since a special tool
and procedure is required.
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