Si Question

[danny Lawrence]

I've got a hb 798 si unit on my boat I think I've learned to read it pretty good but I've had this happen to me a couple times in different places it looks like a column of smoke rising off the bottom just a light cloudy looking colum. any ideas.

[Fat Boy]

prop wash from another boat

[danny Lawrence]

Last weekend it was about 1:30 am and there wasn't another boat around. Today maybe but aren't they uaually horizonal these are vertical.

[redbud]

can you post a screenshot from your unit?

[danny Lawrence]

No I didn't take a picture wish I had know. When I went to down imaging it looked like it was coming right off the bottom.

[captmac]

Spring maybe ????

[redbud]

Danny ,here are two shots from my 997. the first is interference from my motor when I trimmed it up a little.The second is the bubble trail left by my outboard .This bubble trail lasts longer than you would think,I was idling parallel to the Rt 13 bridge. The sunken bridge is closer to the north shore and I idled all the way to the south shore and back,the bubble trail is still visible. I hope this helps.

[danny Lawrence]

Redbud neither one is what I saw I do git interfrence like you first one if I idle to fast or wrong trim I was leaning towards maybe a spring like captmac suggested I guess I need to starting taking pictures. I've found some interesting things. Thanks I really do appreciate the feed back.

[Flippin]

Danny,

I have a 998 and have seen the same thing. There was not a boat anywhere close and I had been idling along for several minutes in 30' - 50' water. It is the same smoke color as prop wash but it is a column that comes off the bottom and goes to the surface. Don House probably could answer our questions.

[danny Lawrence]

flippin thats pretty well on the money. Yeah I think don would probably know. I know I still got alot to learn about what I'm seeing so every trip I make it a point to drive around and look.