foam around transducer

Hey guys, I've been trying to sort out the picture on my elite 5 for a bit but I regularly go by myself so testing and adjusting has been slow. Anyway today I locked the steering and had a look at various speeds to see what's going on. Usually 5-12knots is unusable and 12-30knots is ok in manual with some tweaking but still slight interference.

Issue 1 is easy to rectify. I fitted a bracket to the transom and the tranny is too close to the edge where bubbles are forming. This will fix the 12-30kn problem.

Issue 2 doesn't look so easy. Water is spraying from the front of the leg forward into the transom, also the water level at the front of the leg is much lower than the rear so water is swirling from well behind the outboard, fast down the sides of the outboard and sloshing into the transom. There is no clear water on either side from 5-12knots currently due to the foam.



Should i I put a vertical plate to the side of the tranny to shield it from spray once I've centralised it on the bracket? Boat is a 18ft seaquest with 90 merc. 
 

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wangler's picture

Posts: 607

Date Joined: 26/04/08

Your plate seems

Sat, 2015-02-28 22:19

to be the issue, remove the plate

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fishcrazy's picture

Posts: 1235

Date Joined: 27/01/07

tranny

Sat, 2015-02-28 23:24

it looks slight angled up and too close to prop rotation and yea that plate might be a drama too

T_revz's picture

Posts: 45

Date Joined: 30/04/13

 I put the plate on recently

Sat, 2015-02-28 23:38

 I put the plate on recently so I don't have to punch holes in the transom til I find the sweet spot.i already tried it in existing positions.  It's angled 2-3 degrees down and the tranny is almost square with the base of the plate. The underside has been sikaflexed and sanded back smooth. It has clear water behind it from 12+ knots. I'll move it over 2 inches and hopefully will be better. Then if it still plays up from 5-12kn I'll work out how to address the foam

Posts: 251

Date Joined: 28/07/11

 Keep your plate if you don't

Sun, 2015-03-01 03:00

 Keep your plate if you don't want punch holes but cut off the angle/protruding section and sink the ducer lower. I'm no expert on this but I've stuffed around a fair bit with mine and putting them as low as possible has given me the best results. I always try the manufacturers recommendation first but always end up putting it as low as possible for good results at speed.

Posts: 2925

Date Joined: 27/12/06

i agree

Sun, 2015-03-01 05:56

you can leave the plate there to save your transom but go lower 10mm at least, the lowrance specification is for a perfect hull in a perfect world

fishcrazy's picture

Posts: 1235

Date Joined: 27/01/07

tranny

Sun, 2015-03-01 06:42

i think bout 200mm from prop edge would be bout min

T_revz's picture

Posts: 45

Date Joined: 30/04/13

 I started 20mm lower and

Sun, 2015-03-01 07:56

 I started 20mm lower and have raised it a bit each trip. Any lower than this it doesn't read on the plane. But the main issue is the water spraying from the front of the leg and the water swirling forward and surrounding the tranny with bubbles...