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Old 14 May 2014, 10:40   #11
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Using the Trim Properly

Quote:
Originally Posted by Nos4r2 View Post
Trimming out makes the bow rise, and some motors will trim right in , pushing the bow right down making the bow 'plough' if the trim limit pin is too far in. Might be a recall problem?

More experience is all you need Get the boat out

Agreed, was panicking then Henry!

To be fair, once you have played around it becomes quite obvious. If you Trim out when moving from rest the bow goes too high. trim in on the plane and you feel the bow drop too much and create more drag as it ploughs through the water, rather than trimming out and skimming along with the least amount of boat in the water, too much though and the engine loses grip eventually.

Also on relation to to much the unit is normally geared. From fully out/up, when you lower it it will move quite quickly, then hits a point where it keeps going but much more slowly, from here to fully in is usually the min and max position of trim whilst underway. The fast bit is the "tilt" the slow bit is the "trim" when engines have "power tilt and trim".... Logically.

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Old 14 May 2014, 11:39   #12
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Nos said pretty much everything I was going to.

One other note: I often adjust trim to get a smoother ride over chop or tight swell. If you notice the boat rocking and pounding, you can often adjust trim either in to keep the front from leaving the water, or out to get it to land more stern-first (which will lessen the shock on landing.) Mostly practice and experience to know how to handle whatever conditions you're in.

jky
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Old 15 May 2014, 08:44   #13
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+1 to Nos & Henry's descriptions.

To add to the soup, I trim in (but not fully) to get from 0 -> plane, then trim out until either the prop starts ventilatiing at the slightest excuse or the waves are getting too hairy.

Sounds wolly & imprecise? Yep it is, BUT as also said above, when it feels & sounds right, it probably is. As you trim out (slowly at first until you get the hang of it) you will hear the engine note change from labouring to "free singing".

To put this in perspective I retro-fitted PT to mine, and never got round to fitting the trim gauge sender to the engine -my gauge is still not connected & I trim purely by feel & audio.

So there's your excuse to go & play!
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Old 15 May 2014, 12:07   #14
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Quote:
Originally Posted by 9D280 View Post
To put this in perspective I retro-fitted PT to mine, and never got round to fitting the trim gauge sender to the engine -my gauge is still not connected & I trim purely by feel & audio.
Mine came with a gauge, but the only time I look at it is when I'm verifying that the motor is up for skinny water or trailer recovery, or making sure I'm not doing something [else] visibly stupid. Usually when running I just go by how the boat is performing.

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