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Old 02 October 2008, 03:54   #1
Country: UK - England
Town: Southport
Boat name: Qudos
Make: 5.4 Searider
Length: 5m +
Engine: Yam 115 V4
MMSI: 235068784
Join Date: Sep 2008
Posts: 3,930
Trim & Tilt

Got the basics of trim and tilt sorted in my noggin from reading up on 'tinternet but would like to know some of your secrets. Please, I don't wanna know how you tilt on a Saturday night after trimming yourself!

Be really good if someone could go through the basics as well so I can make sure I've got my head around it the right way.


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Old 03 October 2008, 06:24   #2
Doug Stormforce's Avatar
Country: UK - England
Town: Southampton
Boat name: Yoda & Obi Wan
Make: Valiant 750 & XS600
Length: 7m +
Engine: 150, 115 HP
MMSI: Various
Join Date: May 2004
Posts: 1,031

Start with the engine trimmed fully down. Get the boat on the plane, then drop revs to an economical amount. Now trim up the engine slightly. As you trim up you will feel the helm go lighter and the tone you hear will change. If you raise it to far the steering will go skittery and then you will loose drive as the leg comes up to high.

It’s best to trim up by one or two taps on the button at a time and then see the results. You should also notice your speed slightly increasing as you reduce drag.

If you find yourself about to cross some wash trim back down momentarily. Likewise if you plan to take a sharp turn trim back down for the turn.

If at any point you bring the boat of the plane or to a stop then trim back down before revving up again.

The above all assumes straight line blasting in reasonably flat water. If you are operating in a bit more sea state then basic principles are; - trim the bow down when going into a head sea, so that the sharpest part of your V hull meets the waves and cuts through them, this also increases your water line length and ensures that as your bow lifts over the crest of a wave your are not caught by the wind. In a following sea the opposite applies, trim the bow up so that you don’t burry the bow into the back of the next wave as you come down the front of the current one.

When you trim the engine up far enough the trim tone will change and you are now tilting the leg (rather than trimming). On most engines the gauge on the console is only for trimming, once you are at the top of the gauge you are now tilting. Engine tilt is for beaching, maintenance, very shallow water, some trailers etc.
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