Evinrude E-NATION, for those dedicated to water, power, fishing and fun
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Captain
Posts: 22
Registered: ‎01-26-2020

transducer mounting

Hey does anyone know the rule of thumb for how far off centerline a transom mount transducer should be mounted, ive recently found out I have a lot of slip with my prop and the prop guy asked how close my transducer was, to make sure I wasn’t getting air/cavitation with my prop.
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Captain
Posts: 113
Registered: ‎05-29-2018

Re: transducer mounting

Try to keep it less than 14”  from keel. And away from lifting strikes or other areas of turbulence.

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Admiral
Posts: 9,047
Registered: ‎07-14-2011

Re: transducer mounting

Rule of thumb is about 17" from the motor centerline, but on some boats that is not possible. If that is the case, mount it as far away as you can.  If too close, the motor could develop hot spots or overheating problems due to aerated water being picked up by the water pump.  A disturbed water flow can also affect ventilation in the turns, limit the trimming up angle, and possibly cause cavitation burns on the prop.

 

 

 


"There is never just one thing wrong with a boat";
                    -- Travis McGee, main character in a book series by John D. McDonald 


 



***************

The factory recommends that a properly trained technician service your Johnson or Evinrude outboard motor. Should you elect to perform repairs yourself, use caution, common sense, and observe safety procedures in the vicinity of flammable liquids, around moving parts, near high-temperature components, and working with electrical or ignition systems.

The information offered here is only general in nature and should not be construed as complete factory approved procedures, techniques, or specifications. Always use the proper service manual for your motor, up-to-date service literature, the correct tools, and have an understanding of how to proceed with troubleshooting and repair methods. If you are unsure or uncomfortable with a procedure, a situation, or a technique, enlist the services of a factory trained technician.


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Captain
Posts: 22
Registered: ‎01-26-2020

Re: transducer mounting

So I looked at this and it’s like 8 inches off center line, but it only putrudes like 3/8 to 1/2 inch into the slip stream, and it has a smooth radius lead in, could that really be causing an issue, is it worth moving and dealing with extra holes in my transom or should I just leave it alone?
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Captain
Posts: 841
Registered: ‎08-20-2017

Re: transducer mounting

The best test is to remove the transducer from the bracket, tie it up out of the way then test run the boat.
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Captain
Posts: 22
Registered: ‎01-26-2020

Re: transducer mounting

That’s a good idea, then if no change I don’t have extra holes in the boat.