Startcraft MR210 Mariner water leak

fishcrazy50

Seaman Apprentice
Joined
Nov 13, 2009
Messages
34
IN 07 I replaced the deck and live well hoses along with the live well thru hull. The pump which is transom mounted was fine so left it alone. I didn't want to disturb it's seal. Prior to that, the boat never leaked a drop. Bilge was always dry. After the rebuild, I would get a little water here and there. Nothing to fret over. Last year I started noticing that I would run the bilge two or three times during a 6-8 hour day and get a quart or so every time. This year I've been out 4 or 5 times and note that I'm getting a lot of water. Nothing that is scary as though I'm sinking but every hour I can turn on the bilge for a second or two. Other times I need to let it run a bit.

I have removed the live well pump and plugged all three through hulls. Filled the bilge with water and no leaks. Then filled the live well with water and plugged the drain through hull. Let it sit for 24 hours. Water was at the same level. I had plugged the bilge too. It drained out a small amount a cup or two. Water in the live well was fresh water. The water from the bilge tasted salty.

I now have the inlet side hose closed at the bilge and filled with water. In the morning I'll check to see if the hose is still full of water or has drained. If drained, that will explain where the salt water is coming from. The bilge keeps filling with salt water. Boat has been out of the water for two days. Every two hours I can unplug the bilge and get a cup of water out it.

The only thing I can think of is that maybe there is a seam or hole that runs down the middle. Last week when I put the boat on the trailer upon returning back to the ramp, I noted a lot of water running from the keels drain holes. The keep has an outside piece that runs the length of it. I don't think the boat is seamed along the keep but the hull is one solid piece from gunnel to gunnel.

I cannot find any leaks in the transom or at the through hulls. Not sure where to look next except to lift the deck and dig out all the old foam. I left the original foam in place when I replaced the decking in 07 as it was bright yellow and felt dry. It wasn't damp. Recently saw a pic of a person who cut out the old foam. It too was bright yellow but had three inches of water in it. Top 6 inches or so was completely dry. This was my parents boat and only saw fresh water from 87-07. Water draining into the bilge is salt water.

Thoughts on any further tests I can do before digging the boat back apart?

John
 

fishcrazy50

Seaman Apprentice
Joined
Nov 13, 2009
Messages
34
Checked the livewell intake hose this morning and it was still full. So it's not cracked and the cause of water in the bilge. Decided to clean the bilge by filling it with water and Dawn. Water started coming out the livewell drain thru hull. Didn't make sense as when I filled the livewell and plugged the thru hull, water didn't leak out from the hose. I let the water run a bit and it eventually stopped. Bilge was still full of water. Added more water as I thought the water had drained below the level of the crack. Nope. No more water exiting. My guess is that adding water to the bilge caused the drain hose to rise and standing water in the hose to exit.

Continued filling the bilge and then looked under the hull. A couple of drips were coming from the riveted on keep and a small, but steady stream was coming from under the stbd strake that is riveted on. There must be a hole under the strake and keel.

As much as I hate doing this, looks like I'm lifting the deck and digging out the old foam and then will have to coat with Gluvit. Not looking forward to digging out the old foam and pouring in new. I'm not going to use place-in foam products as they don't offer enough buoyancy or provide structural integrity.
 

GA_Boater

Honorary Moderator Emeritus
Joined
May 24, 2011
Messages
49,038
The water that keeps coming when you pop the plug is probably still draining out of the foam. Have you found any missing or loose rivets?
 

GWPSR

Senior Chief Petty Officer
Joined
Jul 25, 2012
Messages
758
(forum error - double post)
 
Last edited:

fishcrazy50

Seaman Apprentice
Joined
Nov 13, 2009
Messages
34
Bahahhahahaha! Good one guys.

I use windshield sealant around leaky/loose rivets. Works great. Dries clear so doesn't show. Started stripping the boat and then stopped. TO remove the center console, I need to remove the binnacle. It gets removed by unhooking the cables at the engine end and pulled up through. Didn't want to mess with it. Sealed the rivets from below, reinstalled everything, and called it a day. If leaking gets worse to where it's a danger, I'll go ahead and remove the decking and foam, and Gluvit the hull's interior after bucking rivets. One of the rivets today spun way too easily.
 

fishcrazy50

Seaman Apprentice
Joined
Nov 13, 2009
Messages
34
Bahahhahahaha! Good one guys.

I use windshield sealant around leaky/loose rivets. Works great. Dries clear so doesn't show. Started stripping the boat and then stopped. To remove the center console, I need to remove the binnacle. It gets removed by unhooking the cables at the engine end and pulled up through. Didn't want to mess with it. Sealed the rivets from below, reinstalled everything, and called it a day. If leaking gets worse to where it's a danger, I'll go ahead and remove the decking and foam, and Gluvit the hull's interior after bucking rivets. One of the rivets today spun way too easily.
 
Top