Excessive Motor Trimming

[anchor man]

I have a 1700 Lund Fisherman with an F150. It's mounted on the 2nd hole from the top and has a 19 pitch prop. This boat plows a lot of water unless the tilt/trim gauge shows 3/4 or more trimmed up. (which seems to be about the right amount for cruising) However, when I throttle up when starting from a stopped position, the gauge needs to read about 1/4 trimmed up or else the prop washes out. This amounts to a lot of trimming up and down while moving from spot to spot. I could leave the motor trimmed lower all the time, but you can really feel it pushing through the water. Does anyone else have this boat/motor combo and find the same thing..or have any input on this? Perhaps it's normal to be trimming so much with this set up.

Thanks

[Jaybob]

I have the same exact issues with my Crestliner 1800 Serenity/Merc 115. I'm interested to see if this is "normal" also.

[Ralph Wiggum]

I've always played with the trim a lot. I almost always start with the motor all the way down, then trim it up once on plane. It's not necessary except from a performance standpoint.

[knoppers]

the motor trims way in just for hole shot, once on plane, you must trim it out, or else the front end plows through the water.

you get much better performance and economy with the motor trimmed out.

if you need to trim a bunch, the prop must not be the best for your set up.

[anchor man]

So, it's safe to say that it's quite normal for this much trimming. I figured so, but wanted to see if it was common amongst others. Thanks

[Ralph Wiggum]

Yes, there's no one trim setting that's best. It needs to be adjusted.

[Northlander]

What RPM's are ya running at wot?

[Valv]

Yes, it's normal to trim motor up and down a lot while on your way.

If it's just a short distance you can leave it down, or partially up, depending on your needs, but a s a rule of thumb you should take off "down" and trim "up" after you get on plane. After a while you will get used to the sound of the motor without looking behind or at trim gauge.

[anchor man]

Northlander,

I can get it to the 6000rpm max by trimming it up.

[Ralph Wiggum]

Quote:

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After a while you will get used to the sound of the motor without looking behind or at trim gauge.

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Very true. I rarely look at the trim gauge.