Sounder at speed
Submitted by AaronC on Fri, 2012-09-07 07:54
Hi guys
Advice needed.
I currently have a 5.5m ali searider and a furuno 620 with the 600w transducer. Which was on the boat when i purchased it 7 months ago. the motor has a xl leg.
Everytime i go out the sounder seems to work ok until i reach around 12 knots. After then it loses its depth and goes all fuzzy, useless. This is making it very time consuming finding new ground. The boat came with a mounting position as seen on the photos.
How fast does everyone else drive until they lose a good read?
Not sure if its the position of the tranny in relation to the motor? or is this just normal.
Any help would be great.
Image Upload:
andym
Posts: 80
Date Joined: 28/09/06
Looks high
Looks like it is sitting way to high Mate, bottom of transducer should be below hull level ,you can buy a bracket from most boating stores that can br attached to your hull bracket and incorporates a slider so you can change the height of transducer,that should do the trick !!!
Cherrs Andy
jng
Posts: 488
Date Joined: 03/08/07
To high
Deffinately looks to high. I can do over 30knotts and still get good picture on the furuno 620 and p66 tranny before I sold it.
Justin
shortfuse
Posts: 211
Date Joined: 02/01/12
as andym said way too high
as andym said way too high try searching for the transducer mounting instructions and template for the transducer. Would hardly even be in the water when underway.
mrwinta
Posts: 457
Date Joined: 14/01/10
It does look a bit high but
It does look a bit high but with those trannys you only need them 3-5 mm below the level of the hull. Much more than that and they kick back up so just try lowering it slightly- a bit at a time and then give it a run.. I had the 620 & P66 on my rig and it did the same thing as yours but I lowered it too much and it created a huge rooster tail and it kept kicking up.... moved it almost back to the origional position and then I got really good results even at 30+ knots...
Also check there is nothing on the hull that could be disturbing the water before it reaches the tranny i.e. water intake or a strake on the hull as even the smallest of air bubbles can cause problems....
Good luck....
NEVER PUSH YOUR GRANNY WHEN SHE'S SHAVING
mrwinta
Posts: 457
Date Joined: 14/01/10
It does look a bit high but
It does look a bit high but with those trannys you only need them 3-5 mm below the level of the hull. Much more than that and they kick back up so just try lowering it slightly- a bit at a time and then give it a run.. I had the 620 & P66 on my rig and it did the same thing as yours but I lowered it too much and it created a huge rooster tail and it kept kicking up.... moved it almost back to the origional position and then I got really good results even at 30+ knots...
Also check there is nothing on the hull that could be disturbing the water before it reaches the tranny i.e. water intake or a strake on the hull as even the smallest of air bubbles can cause problems....
Good luck....
NEVER PUSH YOUR GRANNY WHEN SHE'S SHAVING
sea-kem
Posts: 15031
Date Joined: 30/11/09
I had the same probs and just
I had the same probs and just adjusted it 5mm lower each time also slightly shimmed back with one of the wedges they supply in the kit. You don't need to move it much to make a big differance. It's hard to tell with yours you need to look at it square on from the rear and line up the bottom of the hull and base of the tranny. Once I got mine right I can do 25 kts with a pretty good picture.
Love the West!
DTrain
Posts: 486
Date Joined: 10/02/12
In the manual there is a
In the manual there is a template that you can cut out and use to figure out where to drill the holes for the braket.
Might be worth printing it out and checking where your screw holes are.
http://airmartechnology.com/uploads/installguide/17-247-03.pdf
JohnF
Posts: 2839
Date Joined: 07/07/10
Angle just important as
Angle just important as depth. Slightly angle down at back eliminates cavitation at speed.
Boston Whaler 235 Conquest......getting the flogging it was built for.
Scotte
Posts: 1145
Date Joined: 07/12/06
I would put a wedge in .i
I would put a wedge in .i had to lower mine a fair bit to get good results. Get a bit of rooster tail but not too bad.also kept kicking up but 2 screws in either side stopped that.
Also is there any strakes etc in front of it that could be upsetting things?