Lowrance 3500 replacement on 1997 searay 210

N

nextelbuddy

Member
Jul 28, 2020
31
Boat Info
1996 Searay 210 BR Signature
Engines
5.7 Mercruiser Alpha 1 Gen II
So my engine is currently out and being rebuilt. I'm doing a lot of ticky tack things while the engine is out. Cleaning up the bilge etc..

My depth finder has never worked And I've done quite a bit of research since last year finding out that there's not really a Good way to fix it so it's better just go ahead and replace it.

I looked online at the specs and it looks like for the 1997 Sea Ray 210 I have a dead rise of 21°

I found another thread on this forum
http://www.clubsearay.com/index.php...th-lowrance-lst-3800-garmin-transducer.89461/


where somebody said they replaced there lowrance 3500 with a 2 inch thruhull Garmin (Airmar) P19/B619 transducer to a Lowrance 3800 gauge

But they had a slightly different model boat

I'm curious if anybody knows if my 1997 Sea Ray 210 also has a 2 in thruhull transducer ?

If that's the case then I wish you a little bit better knowing I can just order the Garmin (Airmar) P19/B619 transducer.


I think I'm also curious about is the current transducer wiring is going through the body harness of the boat all the way up to the gauge.

Should I just bypass that wiring or try to use that same wiring?

Does anybody know if lowrance 3800 gauge will fit into the dash where the 3500 gauge is?


And finally is this installation really as simple as removing the old transducer, cleaning up the bottom of the hull and installing the new transducer with 3M 4200 sealant?

I'm curious to know if the Garmin (Airmar) P19/B619 transducer Will work on a 21° deadrise since it says in the specs that is made for 20° dead rise?

I don't really even think that I will get much out of a new depth finder I'm really just interested in replacing the transducer because I think it may have a slight leak because my bilge always filled up with water more than I like even when the engine wasn't running and all of my exhaust, bearing and shift bellows are new. So ideally I would like to replace the transducer and reseal it just for peace of mind.

Thank you for any help or advice and apologies in advance if this is beating a dead horse with this topic.
 
https://www.jimkaoffshore.com/index.php?id_product=1490&controller=product

Marina replaced mine with model 7-2499.

They said they had to make a spacer to fit the existing thru hull. It looks good and works.

On wiring .... I would abandon in place the old wiring and use the new wire that is attached to the transducer.

If I had to change it out again I'd find one that also has water temp.
 
Thank you very much yeah I took a look at that using your link but it looks like they don't offer the black face gauge anymore. And unfortunately they don't list any details for the transducer like what size it is etc.
 
The P19/B619 fits right in the hole, and works for the 21 degree deadrise. Make sure you get the 20 degree tilt model, they also have a 0 and 12 degree tilt. I got a cheap Lowrance 3800 but I think the hummingbird hdr 650 and Hawkeye 2BX will work as well. You will want to use the new wire to minimize the splices.
 
ColoSR said:
The P19/B619 fits right in the hole, and works for the 21 degree deadrise. Make sure you get the 20 degree tilt model, they also have a 0 and 12 degree tilt. I got a cheap Lowrance 3800 but I think the hummingbird hdr 650 and Hawkeye 2BX will work as well. You will want to use the new wire to minimize the splices.
Click to expand...

Thanks so much for confirming that that helps a lot.

So I had a plastic version and a bronze version saved in my Amazon cart from last year I was about to click the buy now on the bronze version for $173 but I took another close look at the one I had saved and I don't think this one's going to work this one says low profile and the fitting looks significantly shorter than the plastic version

https://www.amazon.com/dp/B00KMDIYFI/ref=cm_sw_r_cp_apa_glt_fabc_6QAYVQ9JJ6K7W95NH89M

So then I did another search and I found another one with the same name b619 this one is much more expensive but it looks taller like the plastic version

https://www.amazon.com/dp/B00TLF5ODS/ref=cm_sw_r_cp_apa_glt_fabc_MJMGZFPTX55K5J7YVSRQ

Here is a link to the plastic version that I think is the right one also

https://www.amazon.com/dp/B00MYSVE1...abc_DE7W101RXJAFJ4FGVF4M?_encoding=UTF8&psc=1

Do you have a link to the exact one that you used?

Did you also use this other Garmin wiring harness pigtail?

https://www.amazon.com/dp/B007XB0SC...abc_E0GHN5HGX2VW0ZGWSFCB?_encoding=UTF8&psc=1
 
The $173 one is the same part number as the one I used. Also, that connector looks to be the same one I used.
 
ColoSR said:
The $173 one is the same part number as the one I used. Also, that connector looks to be the same one I used.
Click to expand...
I ordered the transducer and I got it and I'm ready to install it I go to remove the collar on my old transducer and my existing transducer is significantly smaller it looks like it's one inch diameter compared to the 2 in Air Mar one.

So it looks like I got the wrong one do I need to drill the hole out larger to fit this new transducer or can I return it and get a one that is smaller and diameter that will be a direct fit?

PXL_20210615_223336134.jpg
 
nextelbuddy said:
I ordered the transducer and I got it and I'm ready to install it I go to remove the collar on my old transducer and my existing transducer is significantly smaller it looks like it's one inch diameter compared to the 2 in Air Mar one.

So it looks like I got the wrong one do I need to drill the hole out larger to fit this new transducer or can I return it and get a one that is smaller and diameter that will be a direct fit?

View attachment 107165
Click to expand...

Here Is a picture of the new one next to the old one



PXL_20210615_225357879.jpg
 
That looks completely different than the others that I have seen. What is the diameter of that thru Hull? I would return it and get one that fits.
 
ColoSR said:
That looks completely different than the others that I have seen. What is the diameter of that thru Hull? I would return it and get one that fits.
Click to expand...
It's about an inch in diameter and the new one is 2 in in diameter.

I've already bought a hole Saw 2 in so I'm prepared to make the whole larger. There's definitely some water intrusion, the transducer came out pretty easily with a couple light taps and the wood shows water intrusion and was damp... So I'm going to let it dry out and it probably is better if I just cut out the old wood anyways.

Searching for transducers is kind of confusing I'm finding out, I tried searching for 1-in diameter transducers and didn't really have any good luck and even if I did how am I supposed to know what the proper frequency is to match the lowrance 3800 Gauge .

I'll tell you what out of all my searching for stuff on boats and boat parts and maintenance the most difficult thing I'm finding out is transducer systems... Nothing is ever clear cut and dry
 
It is certainly more complicated than it should be. What I found out was that Airmar builds the transducers for all the major oems, so you can use most any of them so long as you match up the frequency. The only thing that changes on depth is the connector, but you can splice the wires together to use the transducer with most any gauge.

the one thing that does change is the temperature resistor. Lowrance uses a 5K resistor while most of the rest of the industry uses 10k. The lst 3800 gauge shows depth correctly, but does not show water temp correctly because the garmin transducer has a 10k resistor. You can use the Hawkeye gauge and it will show depth and temp.

I used the Lowrance gauge because I got a great deal on it. Also I made a pigtail connector so that I could plug the transducer into a garmin sonar if I wanted to install one in the future.
 
ColoSR said:
It is certainly more complicated than it should be. What I found out was that Airmar builds the transducers for all the major oems, so you can use most any of them so long as you match up the frequency. The only thing that changes on depth is the connector, but you can splice the wires together to use the transducer with most any gauge.

the one thing that does change is the temperature resistor. Lowrance uses a 5K resistor while most of the rest of the industry uses 10k. The lst 3800 gauge shows depth correctly, but does not show water temp correctly because the garmin transducer has a 10k resistor. You can use the Hawkeye gauge and it will show depth and temp.

I used the Lowrance gauge because I got a great deal on it. Also I made a pigtail connector so that I could plug the transducer into a garmin sonar if I wanted to install one in the future.
Click to expand...
Did your bronze transducer come with a rubber washer for installation?

I was reading the instructions and they mentioned a rubber washer but I wasn't sure if that was only for the plastic p19 version or if the bronze version also was supposed to have one.
 
It has been a while, I think it came with one but my mechanic recommended that we not use it. It was left over after the install.
 
thank you so much for the responsiveness. I feel a lot more comfortable going forward with the install
 
your welcome:) this forum has been so wonderful to share information like this.

One quick note, there have been 4 or 5 of us that have done this and about half (myself included) had to go back and make sure the wires were black-black, yellow-white, blue-blue, and bare-bare so don't panic if it doesn't recognize it right away. Also, do make sure to hook up the temp (white-yellow). Some of the units have shown errors if both depth and temp are not hooked up.
 
Hello everyone. New member.
1997 210 signature, 5.7 EFI alpha 1 outdrive.
So, the lowerance depth finder does not display, but the beep is audible when the key is turned on unless that’s the beep as a reminder to turn on the blower?
I purchased a Hawkeye 2b online that I thought came with a through hull transducer, but no. There is a tutorial on afixing the transom mount transducer to the hull in the bilge area. Has anyone tried this? Is there an optimum location (account for dead rise) in the bilge to do this?
Any info will be appreciated.. thanks
 
CanadianGoose said:
Hello everyone.
So, the lowerance depth finder does not display, but the beep is audible when the key is turned on unless that’s the beep as a reminder to turn on the blower?
Click to expand...

Welcome.

The beep you get when you turn the key is the engine alarm telling you it's working.

Most of the time the depth finder has its own toggle switch look around on the dash for a switch for a sounder or depth sounder.

Enjoy..... report back
 
Thanks LD…I’ll have a look. A little unnerving not knowing how close the bottom is especially in murky waters. I checked the fuse for it and it is good.
Cheers.
 
The Hawkeye thru hull fitting is for 0-7 degree dead rise boats. Yours is likely a 21 degree dead rise. Garmin and Humminbird have the right angle thru hulls.
 
Thanks ColoSR…I did find some info about the dead rise and you are bang on. I may have to return the Hawkeye if the other’s thru hull isn’t compatible…and my Lowerance may need a contortionist to remove it.
 
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