rewob Posted January 27, 2011 Share Posted January 27, 2011 How to check a fiberglass boat for leaks Link to comment Share on other sites More sharing options...
rewob Posted January 27, 2011 Author Share Posted January 27, 2011 Water comes from the bottom bung About 1 or 2 litres I've changed the bungs and water still comes in so how to check were the water is coming in from P Link to comment Share on other sites More sharing options...
Catchin Jack Posted January 27, 2011 Share Posted January 27, 2011 Check for visible signs of cracks in hull or around bolts etc or maybe put bungs in and fill hull with water, see if it leaks out anywhere? Link to comment Share on other sites More sharing options...
rewob Posted January 27, 2011 Author Share Posted January 27, 2011 But won't filling up the with water cause damage Link to comment Share on other sites More sharing options...
Catchin Jack Posted January 27, 2011 Share Posted January 27, 2011 Filling it up with water wont cause damage, you take it in the water other times right? Just tilt up trailer afterwards and drain it all out, what's left in there will dry out. Link to comment Share on other sites More sharing options...
rewob Posted January 27, 2011 Author Share Posted January 27, 2011 K thanks Link to comment Share on other sites More sharing options...
tumra Posted January 27, 2011 Share Posted January 27, 2011 mate when you have your boat on the trailer, get your hose and put in on one of the bung holes and turn the water on. Get someone to check out the hull while you are filling it up with water, you will see the water seaping through the hull straight away of there are any cracks in it. Link to comment Share on other sites More sharing options...
DANDRE Posted January 27, 2011 Share Posted January 27, 2011 mate a few of the boat makers user coloured and/or soapy water filled inside the boat (while dry on trailer), then look for colour and/or bubbles outside of the boat. cheers Dan Link to comment Share on other sites More sharing options...
Catchin Jack Posted January 28, 2011 Share Posted January 28, 2011 some hairline cracks only take in water when under stress also, these cracks usually wont seep water so look carefully under boat for slightest cracks in fibreglass. Link to comment Share on other sites More sharing options...
NickF Posted January 28, 2011 Share Posted January 28, 2011 You have to be extremely brutal to fibreglass to get it to crack. Do you remember any really hard knocks or hitting any large swells at speed or the hull slapping the water? You won't have missed it as it would have been a hell of a jolt. Link to comment Share on other sites More sharing options...
rewob Posted January 30, 2011 Author Share Posted January 30, 2011 Hi all I fill the boat up with water and no leaks or cracks in hull so I've got no idea Link to comment Share on other sites More sharing options...
Fester Posted January 30, 2011 Share Posted January 30, 2011 Any cracks in floor? you would be surprised at how much water you drag into boat with anchor rope, little splashes over the sides etc, they all add up, so check you floor everywhere too, under mats, batteries fuel tanks etc. Link to comment Share on other sites More sharing options...
BFB Posted January 30, 2011 Share Posted January 30, 2011 Also check around where sterring cabling, etc comes from engine into hull. My boat gets water in via the tube for the sterring and cables. Not a lot but about 2 to 3 litres per trip. Nothing I am concerned about. Link to comment Share on other sites More sharing options...
sanger Posted January 31, 2011 Share Posted January 31, 2011 Hey mate, When you said you filled your boat up how high did you fill it. I recently havd my boat letting in a little water so filled it up in the garage where the floor was bone dry. Leave it over night because some leaks will be slow unless there is pressure on them like when your driving forward. I was just about to stop filling my boat up because it was about to wet the floor and also right at the top of the water line then just before i was about to stop it started leaking with the crack right at the top of the water line. hope that helps Link to comment Share on other sites More sharing options...
bisso Posted January 31, 2011 Share Posted January 31, 2011 Just a thought... i once had a similar issue with water in the hull whenever i went out in the boat. it turned out to not be the bungs but the housing that screws into the transom that the bungs attach too. unless it is a clean, neat seal then under water pressure they may be allowing water in. i simply bought new ones, cleaned the old crud off and applied sikaflex and installed them. i then applied a bead of silaflex around them to make sure they were completely sealed. to date i do not get one drop of water out of the bungs when i open them upon return from a day out and that has been the case for a few years now. might not be the same in your case but well worth looking at as it is a cheap fix to try first. cheers Mick Link to comment Share on other sites More sharing options...
fishon Posted January 31, 2011 Share Posted January 31, 2011 Water comes from the bottom bung About 1 or 2 litres I've changed the bungs and water still comes in so how to check were the water is coming in from P if its only 1 or 2 litres just buy a bilge pump save the stress mate Link to comment Share on other sites More sharing options...
bc560kk Posted February 3, 2011 Share Posted February 3, 2011 Bisso is right, I had the same problem in a fibreglass boat I had years ago. The screws that hold the bung unit in place were the problem. As bisso says pull out the whol bung unti clean it up and appkly a generous layer of sikaflex before screwing back together. you amy also need to increase the gague of screws you are using. If this doesnt solve your problem, put some water in the hull with food colouring, yellow is less obvious than pink and look for yellow stains. Link to comment Share on other sites More sharing options...
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