998 losing depth on plane?

**sportsman223** · 03-14-2011, 02:43 PM

Ok , thanks for the comments. After measuring transducer to motor I am at 14.5 inches will moving it over 2inches make a difference with rivets on bottom of the hull in direct line of transducer? That is why I mounted it were it is . And could it have any effects to create other problems? Because other than loosing depth at high speed everything else works great

**Shellback** · 03-14-2011, 03:06 PM

Do you mean 2" closer to the prop? Your picture doesn't show what's to the right of the transducer, but I've had better luck with my transducer farther away from the prop or strakes. I don't have an si unit though.

**Shellback** · 03-14-2011, 03:12 PM

Looking at your picture again, it looks to me that your transducer might be below the hull on the right side, but figuring in the V of the hull, is the left side of the transducer 1/8 to 1/4 below the hull? The measurement they give you for placement of the transducer should be on the left side.

**Shellback** · 03-14-2011, 03:22 PM

Here's the manual for installing the transducer which I think you have. It says 15" from the motor. http://store.humminbird.com/media/do...S9HDSI180T.pdf

**sportsman223** · 03-14-2011, 03:30 PM

Yes that would be two inches closer to prop. If I went other way the stakes and rivets get closer together.
I will have to look to see if it is 1/4 on the left side
Thanks

**talltimber** · 03-14-2011, 04:10 PM

Did you happen to try it with the 200hz beam selected. I don't know if that would perform any different. I just read that suggestion somewhere online. I suppose it might have a greater influence on deeper water. The theory was that the 200hz signal was sent and received much faster than the si/di signal, for faster operating speeds. FWIW

**wilbur** · 03-14-2011, 04:40 PM

It tells you if the prop turns clockwise put it to the right if CC go to the left.

Thread: 998 losing depth on plane?

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