Quote Originally Posted by justatrollin View Post
I have read that the 800 khz does not work on 899's and that I will probably have to send the unit in to Humminbird. Is this true or is it possible that my unit is not affected? I heard that it was 2014 models. My units serial number starts with a 14 so I am pretty sure it is a 2014 model. How do you tell the model year? Any help is appreciated.
The 800kHz imaging frequency will work with the 899 with the upgrade XHS 9 HDSI 180 T ...(It's the XNT 9 SI 180 T Compact SI that cannot utilize the 800kHz) ...

To determine when your specific unit was manufactured ... :

The first 2 digits in the serial number is the year ...
The next 2 digits are month ...
The next 2 digits are the day ...

Like scrat mentioned ... Call HB with your unit serial number ... They will determine if your specific unit needs to be repaired for the washout issue ...

1-800-633-1468

Rickie