Quick Tips to Ponder Part 8 – Tilt and Trim

Yet another follower has emailed requesting an explanation of tilt and trim.

Tilt/Trim: I understand the basic principle of these functions, but I am not familiar with when/how to use them. For example, I usually start off with tilt fully lowered. Then, after I gain speed to my desired cruising velocity, I’m not sure what will happen if I pull the tilt up. I notice my bow pull up sometimes. And, I cannot tell what trim is doing whatsoever. Please explain basic operating functions of these features.

trimneutral.gif (3995 bytes)The trim on outboards and inboard/outboards is used to balance the boat in various conditions. As you mention, you should start with the motor in the vertical, 90 degree angle, to the water’s surface. Once you are “on plane” you can adjust the trim down or up to balance or flatten the boat. Trimming will help compensate for different conditions, weight distribution, etc.

By trimming “down”, which puts the lower unit closer to the transom, the stern will be pushed up and the bow will plow. On the other hand, if you trim “up”, meaning that the lower unit is further from the transom, the stern is pushed down and the bow is pushed up.

In smooth water with the bow trimmed “up” slightly, you may get a little more speed. In rough water you may get a slightly smoother ride with the bow trimmed down slightly. Simply put, tilt is what the outboard/outboard-inboard does. Trim is the effect that it has on the boat. Trim is the horizontal adjustment of the boat which makes the bow and stern move up and down.

See also:

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Filed under Boat Operation, Boating News, Boating Safety

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