Humminbird Side Imaging Forums

Side Imaging Forums => 997c SI, 998c SI & 999ci HD SI => Topic started by: Kevin56789 on June 03, 2019, 04:10:25 AM

Title: 999c si lost read at high speed
Post by: Kevin56789 on June 03, 2019, 04:10:25 AM

Hi All

   I am new to the forum and hope to learn more about my electronics.
I bought this boat last August and it had 2 hummingbirds on it. One being
the 999 as my main. I was out about a week ago and decided to cruise a bit
faster then usual after I did I lost my high speed picture the graph went to
1 foot and stayed there. I tried adjusting the transducer assuming it moved.

That did not help. I decicded to do a factory reset. Still no depth reading at high speed
So im wondering if theres a way to trouble shoot this and if someone
might be willing to tell me good settings for the Graph.


Thanks Kevin

Title: Re: 999c si lost read at high speed
Post by: rnvinc on June 03, 2019, 10:53:23 PM

The xducer must be below the hull in order to have constant water flow over the face of the xducer when the boat is up on plane ...

(https://lh3.googleusercontent.com/N3MjQxg5RNFvs_YbNjuH1_CDK-vtgeBKg3whcGYxw5sCtpiGrBz6Jxn8Y4hGrvlIRFGhAg72UGAlV8aUA4rYGIhZgKbA3OMpJN5WR0fw3a2JutRf9qqsd4Wb4rOn313y2gkJ4ZAZjw=w400)

Can you post a Pic of your transom at xducer level  ...??

Rickie

Title: Re: 999c si lost read at high speed
Post by: brents89 on August 12, 2019, 11:10:11 PM

Are you using a second transducer for the higher speed ? The SI transducer is only good to about 8 MPH. I have a 999 and after adding the second transducer, I lost bottom around 20 MPH and then adjusted the transducer angle a little and that helped. I am also trying to find the best settings. I am choosing one setting at a time and making small adjustments and see what happens.