Engine Instrumentation - Four winns V458 Owner's Manual

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When run ning at high en gine speeds, be sure

the trim tabs are in the full up posi tion. Trim tab

ac tion should be only enough to com pen sate

for any list ing. Trim tab ad just m ents at high

speeds are ex tre mely critical. Be prepared to

slow down should handling difficulties arise.

When running in a displacement (very slow speed)

mode, better efficiency will be obtained with the trim

tabs in the full-up position.

Remember that most boats react very slowly to trim

tabs. Often boat owners do not give trim tabs time to

work. Press the trim tab switches for only one second

at a time and then allow some time for the boat to

react. If the boat is still listing after a minute or two,

press the trim tab switch again for a one second

interval. The labels on the trim tab switches indicate

what you want your boat to do, not what you want

the tabs to do.

Engines, Drives and Instrumentation - Section E

Figure E8: Structure of EVC Display Functions

It is a good idea to take your boat out onto open water

shortly after you get it and experiment with the trim

tabs. After you get your boat onto plane, set the tabs

in various positions and note how your boat reacts.

This will give you a feel for how the trim tabs work.

D. Trim Tab Maintenance

Regularly check for any water intrusion where the

interceptor trim tab units are mounted. When needed,

paint the external surface of the interceptor unit with

anti-fouling paint. Note: Do not paint any moving

parts, e.g. the blade! Refer to the manufacturers

information for additional maintenance infor mation.

E - 7