Hey to all as as jetskis are not my expertise.  I thought Id post up a wee bit of trouble I am trying to sort out. My younger brother had a nice yamaha 1600 na ski. 45 hours on the clock and hes after game fish. He lives on the sunshine coast so has some of the most accessible game fishing on the planet on his door step. Now hes no slouch on the ski and asked my advice on sounders.  As i love my Lowrance i had a look around the net and noticed the Lowrance hook3 looked the good - small, wont break the bank and has all the features he needs etc and had good water resistance rating so off he went picked it up installed it dash mount style (some cutting and in glove compartment) and loved it.  Trouble is its a piece of crap and has blown up from water intrusion on his second run. Just from spray through the sd card holder. He dried it iff and went for another run. Same thing. Needless to say hes gutted and has since read these units have alot of trouble with even light rain.  notice the dried spray after a quick 1hr run in fairly nice conditions and the amount of water thats somehow gotten past the "water resistant seal" What would you recommend. My.HDS5 GEN2 has been soaked loads and never had an issue on my surtees 5.5 but for his ski. CN you help -

My Humminbird 597 is mounted on the glove box of the ski and has never missed a beat. Prior to the ski, I had it on a kayak and it got a couple of dunkings, as in total immersion. Again, no problems.

Just got to work out the warrentee as there is no way.abit of spray should have blown sizzled and.smoked unit

Jake we are putting Raymarine on all our skis we sell, are proving the most water repellent.

Just an update. So things have gone alittle pear shaped. He decided to do a service. And despite all best attempts 2 plugs were so corroded in so bad the head was removed. Driled and tapped to the two to a bigger thread. Turns out the original owner didnt do any maintenance just 45 hrs then let it sit.. He pulled everything apart new gaskets plugs. Whiles hes at.it hes doing new fuel pump and pretty much every perishable to reduce the chance of any reliability issues. Its all back together now running well. Still has to take the sounder unit back and he will likely sika flex the whole thing shut.

Black tape over the card port and silicon is what most kayakers do.