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Author Topic:   Transducer Location
Al_A_Buy posted 03-11-2003 10:20 PM ET (US)   Profile for Al_A_Buy   Send Email to Al_A_Buy  
I know, I know, this topic has been beaten to death and Jimh posted an outstanding reference article on the mounting of sonar transducers. Having followed the advice contained therein, and the manufacturer's directions, I still am not able to find the bottom at any speed above 10 mph. Additionally, the current position (8" starboard of keel) and depth (3/8" below hull bottom) throws one heck of a roostertail.

I have a new Hummingbird 200 mounted on a 1974 21' Outrage. I am looking for model specific assistance.

Thanks in advance....


doobee posted 03-11-2003 11:29 PM ET (US)     Profile for doobee  Send Email to doobee     
The transducer should be set so the after edge is lower than the leading edge. The leading edge shouldn't be more than 1/8 - 1/4 below transom edge. Also try moving left or right 2".

whale on!

bdb posted 03-12-2003 09:49 AM ET (US)     Profile for bdb  Send Email to bdb     
Your model has a very busy bottom that produces lots of dirty water. Look at the bottom from the transom, forward, and you'll see strakes, sponsons and sharp edges that all aerate the water flowing to the transom. Additionally you have the hull extensions that reach beyond the transom. The water really roils back there, and you've got to find solid water to get a solid signal.

I fooled around for quite a while finding a location that functioned for my transducer. I also tried a number of different products and found that Lowrance's Hi-Speed transducer performed the best. Unfortunately I no longer have the boat. But the absolute key was to find the "cleanest" spot on the transom for mounting. And fractions of inches one way or the other are critical. Consider mounting a piece of King Starboard to the transom so you can shift mounting spots without drilling a million holes in the transom.

The boat is currently owned by "Classic 71." Perhaps he can measure exact location of the transducer...'cuz that spot works.

Harpoon, been there, Harry

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