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Author Topic:   Conquest 23 leak
Hank23 posted 03-30-2005 01:49 PM ET (US)   Profile for Hank23   Send Email to Hank23  
I have a leak that has developed in the cabin. I first noticed water in the light on stb side. Removed screws in panel , but liner is stapled and I don't want to rip off if possible. Quite a bit of water after heavy rains. Any ideas on possible cause of leak? Thanks for the help.
ivansfo posted 03-30-2005 02:55 PM ET (US)     Profile for ivansfo  Send Email to ivansfo     
I have struggled with leaks into the cabin of my 23 Conquest for 2 years. Whever it rained or when I washed the boat, water gets inside the cabin. So much that the cushions are all wet.

My leak was coming from holes drilled to mount the base on the factory aluminum hardtop. The feet of the hardtop top frame mounts to the top of the cabin with 1/4" bolts. The only sealant the factory put on there was a bed of silicon. The silicon seal failed in my case and allowed water to leak though the bolt holes. I tried caulking around the perimeter but this didn't work because the hardtop wasn't bolted down very securely so flexing alway broke the seal.

I finally fixed the problem last year. Here's what I had to do:

1) Remove the the panel on the starboard side where the cabin light is mounted. You'll have to remove some staples to get this panel off.

2) From inside the cabin unsrew the bolts holding down the 4 base of the hardtop frame. Total of 12 screws.

3) The hardtop frame now allows me to lift it up about 1/2" on the front. Scape off the old silicon sealant under the footing of the hardtop frame.

4) Generously apply a new bead of 3M boat sealant around the base.

5) Reattached the hardtop frame to the boat using brand new nylon locking stainless steel nuts and washers. The nuts and tiny locking washers the the factory installed are crap.

So far all last season, not one drip of water found on my cushions.

If you don't have a factory hardtop, then I look into where the windshield wiper mounts and also the mounting holes for the windshielf itself.


BW23 posted 03-30-2005 07:21 PM ET (US)     Profile for BW23  Send Email to BW23     
Mine dosen't leak but would recommend 3M 4200 for this application rather than a tyical silicone sealant.

How did you get to the underside of the port flange??
The headliner appears to be attached with adhesive.


dauntlass 18 posted 03-30-2005 09:08 PM ET (US)     Profile for dauntlass 18  Send Email to dauntlass 18     
In the search section type in" conquest cabin leaks" you will find several bits of information on cabin leaks.I hope this is of help to you.I had leaks on my 21Conquest the first year of ownership they are fixed and have not been a problem since.
Hank23 posted 03-31-2005 09:37 AM ET (US)     Profile for Hank23  Send Email to Hank23     
Thanks for all the great info! I'll let you know the results.
handn posted 03-31-2005 10:26 AM ET (US)     Profile for handn  Send Email to handn     
I had a cabin leak in my 305 Conquest and fixed it as Ivansfo described, using 5200 sealant rather than silicone. I also had a leak around my windshield wiper which was fixed by tightening the nut so that the gasket fit snugly. Depending on the age of your boat, the gasket may have gotten old and stiff and may need to be replaced.
Other possible leak sources are from the hatches, ports, navigation lights and bow rails.
bsmotril posted 03-31-2005 11:57 AM ET (US)     Profile for bsmotril  Send Email to bsmotril     
Don't just fix the symptom, fix the source of the problem. If your hardtop only has a single leg on each side up front, you have the older style mount that shakes a lot side to side. There is a factory fix available that adds an additional brace leg to each side in front. Installation requires welding, but the pieces are cut to fit precisely and they essentially eliminate any motion at all of the top once installed. Without them, you will eventually break the welds on the rear mount leg, and loosen your repaired seal at the mounting flange creating leaks again. The fact that Whaler upgraded the mounting on the later Conquests 23s and provide the kit for older tops is evidence that this was a fairly widespread problem. BillS
castnover posted 04-10-2005 07:36 PM ET (US)     Profile for castnover  Send Email to castnover     
wow great info guys i have a leak in the aft cabin

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