Trojan Boat Forum

The first transducer (with the spinning wheel) is probably speed and possibly (as you say) temp. The second (flat plate) one is probably a depth transducer. Depth transducers should not be painted (the edges can be, but the main transducer surface should not be). The speed/temp transducer can be painted as long as it doesn't interfere with operation.

Re the blistering - hard to tell with the low res pictures. Could be some blisters that were popped with the blasting, or blasting might just have been done poorly and gel damaged. Make sure your blasting is being done by someone who knows how to blast a boat... Far too many people hire goonies that normally blast brick or metal to do their boats, but the approach and materials used for brick and metal are far too aggressive for gelcoat and can end up doing more damage than good.

Some people paint the transducers some don't . they say not to paint in many cases and work better for a while but growth will happen quickly . I paint mine with a water base paint ( hydrocoat bottom paint) I don't have any issues


Why are you removing the paint from the Thu hulls ? You don't want to plug them up with paint but they still need paint .


That hull looks like a normal blasting job . and you see why the need to barrier coat after there blasted .

prowlersfish wrote:Some people paint the transducers some don't . they say not to paint in many cases and work better for a while but growth will happen quickly . I paint mine with a water base paint ( hydrocoat bottom paint) I don't have any issues


Why are you removing the paint from the Thu hulls ? You don't want to plug them up with paint but they still need paint .


That hull looks like a normal blasting job . and you see why the need to barrier coat after there blasted .

this is why i should leave well enough alone when posting in the evening. my evening meds were kicking my butt and i guess i was not being very clear in my explanation. i'll speak w/ ryan this morning regarding the painted over transducer (flat plate). i don't remember if it was painted or not. either way, will it still 'read' depth or will i have to get the paint removed?

ENGINE/GENSET THRU HULLS--- sorry, was not clear on this one either. the small holes for the genset pickup (it's round and has about 20-30 holes in it) was completely painted shut. not one hole was clear of paint. it looked like the depth transducer. so, i just took a small pick and dug out the paint (not fun or easy in my present condition) then followed up with a drill bit in my hand and slowly 'dug out' the remaining paint. the engine and a/c scoop/strainers were equally clogged. out of the 5 slits, two were open on the starboard side, none (as in completely painted shut) on the a/c scoop strainer and one for the starboard engine.

i took a small putty knife and dug out the paint and once all the holes were open for the THF's, i sprayed a light coat of zinc coat over the exposed metal. i might ask ryan to give me some bottom paint and i'll go over it with a light coat of bottom paint using a brush for detailing.


i think i know what happened. ryan, as busy as he has been playing catch up, 'outsourced' the bottom paint job to two of his yard workers. they just slapped the paint on a roller and went to town. i ran into these two characters last week, and, well, my communication to them was not fully understood. actually, none of it was understood. i could have used a 'universal translator'.

while i have your attention, the transom zinc is slightly pitted but not fully eaten through. do you guys suggest that this too be replaced or will it be okay for another year?

thanks guys for your understanding.
aaron

The little wheel is definitely for speed, I have a through the hull to install from Airmar, #744 and it has one also which you might want to look at. I can take the ducer out in the water the airmar through the hull has a flap valve device that blocks the water just temporarioly when inserting a new or cleaned ducer.

You can never have too many "Zinc"s on the boat. The Zincs act as sacrificial metal and keep electrolysis from eating up your running gear and other thru hull fittings. Keeping a boat in a marina with all of the shore power and stray current in the water creates a battery and the zincs are the softest metal which are intended to get eaten first. They are cheap in comparison to the thru hull fittings and are a maintenance item which we should all keep up on.
Barry

i replace mine every time i haul the boat, doesnt cost much and u cant ever be to safe

Vitaliy wrote:i replace mine every time i haul the boat, doesnt cost much and u cant ever be to safe

done. found out why it was not changed with the rest. the boat yard had run out of the diver zincs and they are getting a shipment this afternoon.
i too always change them out with a haul out. be it mid season or in the spring. every time.