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04-17-2018, 03:36 PM
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#1
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Senior Member
City: Solomons Island, MD
Vessel Name: Heather Alyssa
Vessel Model: Mainship 350/390
Join Date: Mar 2017
Posts: 217
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On the hard and water in the bilge?
Hello Trawler friends. Now I’m confused. My 1999 Mainship 350/390 is currently in the boat yard and being splashed next week. I removed my shrink wrap two weeks ago. Since then all has been good. I cleaned the bilge and engine room. It looked great. It rained over the weekend. I walked back to the boat today to check on it, and I noticed the bilge is almost topped off with water. Water is obviously not coming from below. Has anyone experienced this? Rainwater somehow entered the boat into the bilge. The interior of my boat is dry. I have a generator hatch and lazaret hatch back aft exposed to the elements but those have drains. Has anyone ever experienced a bilge filling up with rainwater even though the interior is dry and the hatches have drains???
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04-17-2018, 03:45 PM
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#2
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Guru
City: Quebec
Vessel Name: Bleuvet
Vessel Model: Custom Built
Join Date: Jan 2016
Posts: 4,374
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Quote:
Originally Posted by HeatherAlyssa
Hello Trawler friends. Now I’m confused. My 1999 Mainship 350/390 is currently in the boat yard and being splashed next week. I removed my shrink wrap two weeks ago. Since then all has been good. I cleaned the bilge and engine room. It looked great. It rained over the weekend. I walked back to the boat today to check on it, and I noticed the bilge is almost topped off with water. Water is obviously not coming from below. Has anyone experienced this? Rainwater somehow entered the boat into the bilge. The interior of my boat is dry. I have a generator hatch and lazaret hatch back aft exposed to the elements but those have drains. Has anyone ever experienced a bilge filling up with rainwater even though the interior is dry and the hatches have drains???
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Through ER vents maybe? Water tank leak? Broken water line?
L
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04-17-2018, 03:52 PM
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#3
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Guru
City: Jacksonville
Vessel Name: SONAS
Vessel Model: Grand Alaskan 53
Join Date: May 2014
Posts: 7,235
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Check your deck drains, one of them may have come loose under the deck fitting. Put a partially turned on hose on each deck fitting and have someone listen for water trickling into the bilge to shout when you hit that fitting.
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04-17-2018, 03:54 PM
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#4
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Moderator Emeritus
City: Au Gres, MI
Vessel Name: Black Dog
Vessel Model: Formula 41PC
Join Date: Jul 2015
Posts: 21,131
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You can lay paper towels around suspect areas and see if they get wet over time. The towels will change if they get wet even if they happen to dry out before you check them.
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04-17-2018, 03:57 PM
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#5
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Guru
City: Miami Florida
Vessel Name: Possum
Vessel Model: Ellis 28
Join Date: Aug 2011
Posts: 5,299
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Hatch drains get blocked pretty easily, then the water goes into the boat. Try blowing them out with air or water or maybe pass a wire through them.
__________________
Parks Masterson
Retired from Hopkins-Carter Marine Supply
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04-17-2018, 04:22 PM
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#6
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TF Site Team
City: Seneca Lake NY
Vessel Name: Bacchus
Vessel Model: MS 34 HT Trawler
Join Date: Nov 2014
Posts: 7,808
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Check around / below rubrail inside ER.
Hull deck joint is notorious for leaking and many boats but MS maybe more than others.
See Bacchus Projects Pg 4 - and click on Hull / Deck Joint Repair for details
Some propose simply caulking above the rubrail w/ silicone -
Note: I DO NOT support this practice but everyone needs to make their own decisions.
I do not like silicone - see the details for more... and I believe the external caulk is a band-aid temp fix -
I prefer to correct the root cause of the leak as a permanent repair.
As others have stated taping paper towels in strategic places helps determine the source. I also agree many other possible sources so best to confirm before expending lots of effort.
However, I'd be willing to wager a small amt that the hull deck joint is a likely source.
__________________
Don
2008 MS 34 HT Trawler
"Bacchus"
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04-17-2018, 04:32 PM
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#7
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Senior Member
City: Solomons Island, MD
Vessel Name: Heather Alyssa
Vessel Model: Mainship 350/390
Join Date: Mar 2017
Posts: 217
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Wow. Quick replies. My water tanks are empty since I was on stands all winter. I’m going to assume ER vents are (Engine Room Vents)? I could be wrong but I don’t think the Mainship had ER vents. Or did it? The hull is smooth with no vents. Only thru hulls. Now I’m curious. I’m going to head back to the boat now and inspect a little. My motivation drops when it’s breezy and 50 degrees. I am steering more towards blocked drains.
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04-17-2018, 04:52 PM
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#8
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Guru
City: Gig Harbor
Vessel Name: Kinship
Vessel Model: North Pacific 43
Join Date: May 2015
Posts: 9,046
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Quote:
Originally Posted by HeatherAlyssa
Wow. Quick replies. My water tanks are empty since I was on stands all winter. I’m going to assume ER vents are (Engine Room Vents)? I could be wrong but I don’t think the Mainship had ER vents. Or did it? The hull is smooth with no vents. Only thru hulls. Now I’m curious. I’m going to head back to the boat now and inspect a little. My motivation drops when it’s breezy and 50 degrees. I am steering more towards blocked drains.
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It is possible that you had a blocked deck drain hose. If there was water in the hose above the blockage, the water could have frozen over the winter, splitting the hose. Not much of an issue if the boat was shrink wrapped. However, remove the wrap and the water can then enter the deck drain, and run through the split into the bilge.
Just another possibility.
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04-17-2018, 04:56 PM
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#9
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Guru
City: Brookline, NH
Vessel Name: Shalloway
Vessel Model: Defever 44, twin Perkins
Join Date: Sep 2013
Posts: 2,259
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Don't forget the chain hawse for the anchor. Water could get in there, though from the sound of it you had quite a bit of water get in.
Ken
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04-17-2018, 05:52 PM
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#11
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Senior Member
City: Solomons Island, MD
Vessel Name: Heather Alyssa
Vessel Model: Mainship 350/390
Join Date: Mar 2017
Posts: 217
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Hello all. I figured it out. My lazaret hatch is the culprit. Although there is a drain, as my boat sits on the jack stands, it is leaning/listing slightly to starboard. My lazaret hatch has a water track around the opening. Guess what side of the track the drain hole is on? Yes. The port side. Water was rising above the starboard side of the track faster than it could drain on the port side drain hole. I know this because I saw the water sitting up flush against the starboard side when I lifted the hatch. Meanwhile, the drain hole wasn’t draining that water because it wasn’t flowing into it. Thank you for the quick replies. You rule!
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04-17-2018, 07:00 PM
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#12
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Guru
City: Gig Harbor
Vessel Name: Kinship
Vessel Model: North Pacific 43
Join Date: May 2015
Posts: 9,046
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Quote:
Originally Posted by HeatherAlyssa
Hello all. I figured it out. My lazaret hatch is the culprit. Although there is a drain, as my boat sits on the jack stands, it is leaning/listing slightly to starboard. My lazaret hatch has a water track around the opening. Guess what side of the track the drain hole is on? Yes. The port side. Water was rising above the starboard side of the track faster than it could drain on the port side drain hole. I know this because I saw the water sitting up flush against the starboard side when I lifted the hatch. Meanwhile, the drain hole wasn’t draining that water because it wasn’t flowing into it. Thank you for the quick replies. You rule!
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Great news!
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04-17-2018, 07:34 PM
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#13
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Senior Member
City: Solomons Island, MD
Vessel Name: Heather Alyssa
Vessel Model: Mainship 350/390
Join Date: Mar 2017
Posts: 217
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Thank you. In the meanwhile... I drained and vacuumed all the water. Back to normal for now.
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04-17-2018, 07:52 PM
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#14
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Guru
City: Jacksonville
Vessel Name: SONAS
Vessel Model: Grand Alaskan 53
Join Date: May 2014
Posts: 7,235
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Quote:
Originally Posted by HeatherAlyssa
Hello all. I figured it out. My lazaret hatch is the culprit. Although there is a drain, as my boat sits on the jack stands, it is leaning/listing slightly to starboard. My lazaret hatch has a water track around the opening. Guess what side of the track the drain hole is on? Yes. The port side. Water was rising above the starboard side of the track faster than it could drain on the port side drain hole. I know this because I saw the water sitting up flush against the starboard side when I lifted the hatch. Meanwhile, the drain hole wasn’t draining that water because it wasn’t flowing into it. Thank you for the quick replies. You rule!
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Great, a simple fix.
BTW, I was shocked when I saw the drains on my lazarete hatch. There are four - one in each corner. And the all have separate hoses to a lower merge then to a through hull. I thought (and maybe still think) that this is a bit of overkill. But I am not going to try and out guess DeFever!
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04-17-2018, 07:56 PM
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#15
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Senior Member
City: Solomons Island, MD
Vessel Name: Heather Alyssa
Vessel Model: Mainship 350/390
Join Date: Mar 2017
Posts: 217
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I actually think that is a good idea. As I looked at my hatch I thought to myself, “If I was a Yacht builder, I’d incorporate all of the crazy things that I see that need improvement.” I’d make a super boat. Lol. I’ll start with the drains. Looks like DeFever got the memo on that one already.
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04-19-2018, 11:07 AM
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#16
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TF Site Team
City: Westerly, RI
Vessel Name: N/A
Vessel Model: 1999 Mainship 350 Trawler
Join Date: Jan 2014
Posts: 4,154
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Quote:
Originally Posted by HeatherAlyssa
I’m going to assume ER vents are (Engine Room Vents)? I could be wrong but I don’t think the Mainship had ER vents. Or did it?
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They should be on the inside of the gunnels in the cockpit. Notice on Port and Stbd, you can reach your hand up into the gunnel from underneath (there's no bottom). Your Engine Room (ER) vents should be there.
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04-19-2018, 11:31 AM
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#17
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Guru
City: Sarasota,FL/Thomasville,GA
Vessel Name: Steppin Stone IV
Vessel Model: Marine Trader Kelly Trawler 46
Join Date: Jul 2013
Posts: 1,815
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Quote:
Originally Posted by HeatherAlyssa
Hello all. I figured it out. My lazaret hatch is the culprit. Although there is a drain, as my boat sits on the jack stands, it is leaning/listing slightly to starboard. My lazaret hatch has a water track around the opening. Guess what side of the track the drain hole is on? Yes. The port side. Water was rising above the starboard side of the track faster than it could drain on the port side drain hole. I know this because I saw the water sitting up flush against the starboard side when I lifted the hatch. Meanwhile, the drain hole wasn’t draining that water because it wasn’t flowing into it. Thank you for the quick replies. You rule!
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Very good news glad it was a simple one
__________________
Alan
Skype roatan63
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04-24-2018, 02:45 PM
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#18
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Guru
City: Philadelphia
Vessel Name: Dreamers Holiday
Vessel Model: Mainship 390
Join Date: Jun 2010
Posts: 572
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i have a 2003 390 and my bilge was taking on water when it rained and when washing the boat. it was the hose connection on the port side drain from the fly bridge. I assume you know the supports on the port and starboard aft corners are actually drain pipes for the flybridge. they connect to a tee in the lazarette. one side of the tee came off and all of the water went right into the bilge. If it happens you need a really skinny friend to reattach it.
John
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04-24-2018, 07:19 PM
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#19
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Senior Member
City: Solomons Island, MD
Vessel Name: Heather Alyssa
Vessel Model: Mainship 350/390
Join Date: Mar 2017
Posts: 217
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Lol. Yeah I know about the supports. Not only do I wish I had a skinny friend, but I also wish I had a 2 foot skinny friend.
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04-24-2018, 07:41 PM
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#20
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Dauntless Award
City: Wrangell, Alaska
Vessel Name: Dauntless
Vessel Model: Kadey Krogen 42 - 148
Join Date: Jan 2013
Posts: 2,820
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Quote:
Originally Posted by HeatherAlyssa
Hello all. I figured it out. My lazaret hatch is the culprit. Although there is a drain, as my boat sits on the jack stands, it is leaning/listing slightly to starboard. My lazaret hatch has a water track around the opening. Guess what side of the track the drain hole is on? Yes. The port side. Water was rising above the starboard side of the track faster than it could drain on the port side drain hole. I know this because I saw the water sitting up flush against the starboard side when I lifted the hatch. Meanwhile, the drain hole wasn’t draining that water because it wasn’t flowing into it. Thank you for the quick replies. You rule!
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Good Job.
Mine does the same. Glad you found the simple solution.
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