The NavMan sounder manual clearly instructs you on the mounting position and describes the correct side for mounting the transducer. It is not an urban myth.
The NavMan sounder manual clearly instructs you on the mounting position and describes the correct side for mounting the transducer. It is not an urban myth.
well nether the lowrance or garmin manules say anything about what side to mount them on however they both say now closer than a foot from the motor
i have two boats also and have the transducers on oppisite sides and nether of them have ever had problems with readings
southwind is on the starbord side while the quinny has the transucer mounting bracket on the port side
Isn't it a bugga when boat manufacturers even put things in the wrong place and people then think that's where it should be. Just crazy man.
Well bugga me guess where Furuno says to put it? Maybe it's time to read the manual unless of course you've also got one of those boats that's been fitted wrong from scratch?.
would like to hear from other quinny owners where your transducer mount is on the boat and also from other makes of boat
but do need to say nill effect from being on the wrong side
would be a intresting one for the myth busters but
I have a port side mounted transducer on my Sea Jay. It has always worked perfectly for the 2 sounders I have had in this boat. (Have had the boat for 6 years.)
Cheers
Don.
My Garmin came with a template to assist in locating the holes for the screws that hold the transducer in place. This template is clearly designed for the starboard side of the hull.Originally Posted by basserman
Sam
Copy below of the installation instructions for my Raymarine transducer.
- Darren
Hi, I have attached about 4-5 tranducers in my boating life.
I have always run the wiring down the opposite side to the motor wiring loom to avoid electrical interference, which worked, but had trouble with airation. Till last time.
Each previous time the manual had said to position the transducer behind a strake, but this time I have put it much closer to the keel about 6 inchs to the drivers side.
This has resulted in excellent high speed bottom contact and none to very little airation, which is great because I am interested in what I travel over to and from the fishing grounds.
Pual
Ive been reading up on this a lot, as I am about to install anew transducer. Theres a lot of info on it in another forum that has a marine electronics section. (Can I say that here?)
Yes, theres a lot of manuals that say Starboard side.
Now can someone please explain to me why theres less aeration on that side? It seems simple physics to me, that the prop must exert equal thrust in all directions, or the boat wouldnt go forward, it would tend sideways. I dont care whether the prop spins clockwise or counterclockwise, it MUST thrust evenly on both sides.
Wheres that physics teacher I saw on towbar thread?Can someone enlighten me? Shall we all have a look at our wash next time were out?
gogecko - I think it has to do with the direction the water/air is travelling across the transducer. You are correct in that there is equal thrust on both sides of the prop (Actually equal the full 360 degrees) but, by looking at the direction of the prop and the tangents from it, you see the direction the force is going (See pic). If the transducer is mounted to the right in this picture, the turbulence (force generated from the prop) runs over the top of the transducer in a "down and to the right" angle. This doesn't affect the "face" of the transducer too much... If it was mounted on the left in the picture however, the force/turbulence would run "up and left" across the face of the transducer.
In practice of course, you wouldn't mount the transducer too close to the prop anyway, so any turbulence is not going to be an issue.... But this is the physics (I think) of it all... I did physics for many years, but I could be rusty as it wasn't called HIGH school for nothing!!!![smiley=beatnik.gif] [smiley=freak.gif]
Thanks Dan. Sounds like your high school days were a lot like mine.Some of still think were in high school, for that matter.
I see your explantaion makes some sense. I was thinking that the manufacturers of sounders are giving this advice needlessly, because it only matters when the transducer is BEHIND the prop. Yet most are mounted beside the prop or slightly in front. Id expect there is some suction effect from prop wash, not blowout efect.
In hindsight, your explanation would be correct, so thanks. Thrust may be equal, but air bubbles travel sideways.I'll stick my head over the back and have a look tomorrow. As Dr Karl says, 'do the experiment!'.
The up swing side of the propellor creates turbulence on the hull, bubbles and transducers don't go together. Mount it on the down side whatever side that might be, usually the RHS.
WOW, and my answer was only a one liner.
I didnt think I was being a commedian, just passing on information.
OH THIT
David
Hey basserman,
my quinnie explorer has mounting plate (alloy) on the port side and i've found suffers from aeration quite a bit. I sort of fixed last trip by angling the face of transducer slightly forward but soon returned to old ways when some weed tangled up and dragged it back again. I 've almost given up on meaningful sounder readings when underway.
cheers, Roo.
Interesting the responses sometimes David, for some it doesn't appear to matter how much info or how little or what, there's always the distractors ready to knock, must get annoying. Maybe the doubters can understand the following
3. Mount the transducer on the side of the hull where the propeller is moving downward. The upward motion of the propeller generates pressure waves and pushes bubbles up against the hull. By mounting on the downward side, the hull shades the transducer from this effect.
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