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engine noise on FF

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Category: General Forums
Forum Name: Tech Topics
Forum Description: IT - Computers, software, phones, ISP's....
URL: https://www.fishing.net.nz/forum/forum_posts.asp?TID=122894
Printed Date: 04 Feb 2026 at 11:38am


Topic: engine noise on FF
Posted By: kiwifred
Subject: engine noise on FF
Date Posted: 13 Jan 2017 at 10:00am
was out at xmas with my dad in his little 14ft ali boat. at about 3 or 4 knots the ff screen turned to mush which i assume is engine noise as you could see it increase the faster we went.  is there anyway of clearing this up? i assume because he has an older engine with no shielding


Replies:
Posted By: MacSkipper
Date Posted: 13 Jan 2017 at 10:50am
Sounds like aeration of water going past  transducer (FF pickup) with increased speed rather than electrical noise from motor?  Does revving motor in neutral produce same effect?
Try a different angle (more or less) and different location depth of pickup - is a rib on hull in line with pickup?
Sometimes no amount of playing will fix sometimes moving will improve - is pick up on right side of outboard viewed from rear?  If on left side will get more aeration from prop rotation.
Plenty of info online about installing and location of pickup.


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Good fishing trip nothing breaks, great trip catch fish.

Posted By: kiwifred
Date Posted: 13 Jan 2017 at 2:40pm
Thanks that could it. right side of the Ob reason i thought electrical noise is that it was a very definate change from nothing to mush. I say mush but when i first saw it i thought it was the green sea lettuce that is prevalent in the tauranga harbour this time of year but when we slowed and it all disappeared. well that theory went out the door. dad was getting all excited as it was showing as hundreds of fish. lol that all of a sudden disappeared when we stopped. i will get him to look at his mount and how it sits in the water


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