Trim Tab Zinc Plate - Chris-Craft 2015 21 Carina Owner's Manual

EIC Installation Overview
Hydraulic
Power unit
Reservoir
Figure 3-26. Trim Tab
System Overview
Improper use of the trim tabs can cause an accident and/or injury.

Trim Tab Zinc Plate

Each trim tab contains a sacrificial zinc plate which slows the development of corrosion on the tab. This
plate should be inspected and replaced when necessary.
Maintenance
- Periodically, check fluid level in HPU. With trim tabs fully retracted, fluid level should be about 2" from
bottom of reservoir (approximately 22 ounces). To refill, remove the lexan cover and filler plug located
on the front left hand corner of the reservoir.
FLUID (ATF) ONLY. Brands or types of ATF can be mixed. Running the HPU with excess or lack of
fluid will not cause damage.
- Periodically, check for clean electrical connections on the back of the control, HPU ground wire and
quick disconnect plug.
- Cold temperatures do not affect the trim tab system. No winterization is necessary.
- SALTWATER ONLY - To deter electrolysis, a zinc anode should be attached to the top of each trim
tab. The zinc must make direct contact with the stainless steel. In the case of trim tabs installed on the
boat as original equipment by the builder, a bonding system is utilized for your particular model.
- We suggest using anti-fouling paint to help protect the trim tabs from marine growth. The secret to
getting anti-fouling paint to adhere to your trim tabs is proper priming, and the best people to tell you
what to do are the experts at the company that makes your anti-fouling paint. We strongly suggest that
you contact the paint manufacturer and tell them you are painting "304 stainless steel" trim tabs, then
follow their recommendations to the letter!
- Unpainted trim tabs may acquire an orange discoloration.
MOLECULES IS NORMAL.
Note: this discoloration should not be confused with the pitting and corrosion of electrolysis.
3-26
Systems
Position
Indicator
Control Box
Actuators
FILL WITH ANY TYPE OF AUTOMATIC TRANSMISSION
Remember don't paint under the zincs.
Orange coating can be cleaned off, but will eventually return.
Trim Tab
Position
Indicator
Auto Tab
Retractor
THIS OXIDATION OF SURFACE CARBON
3-26