Nolezone Posted April 27, 2018 Report Share Posted April 27, 2018 RF 18, lots of water coming in (run bilge pump every 8-10 minutes). My rear starboard bilge pump outlet...might be letting water flow freely in when turned off and below outside water level. Yamaha 150 Vmax is pretty heavy back there and when I am back there that adds over 200.lbs. not to mention the increasingly heavy weight of the bilge’s rising water level. Shouldn’t this outlet be a one way outlet? As in “water goes out and none comes in?” This couldn’t be a design flaw, could it? Suggestions? Link to comment Share on other sites More sharing options...
whichwaysup Posted April 27, 2018 Report Share Posted April 27, 2018 can you plug it temporarily and confirm that is the issue? Link to comment Share on other sites More sharing options...
JEM Posted April 27, 2018 Report Share Posted April 27, 2018 I have never heard of a one way valve in a bilge pump outflow hose. I might be wrong. But for certain, you can't have the bilge pump thru hull below water level! That HAS to be corrected, one way or the other. Typically, the thru hull for the bilge pump is just below the rub rail, so you are saying that the water level, when you are heavy, sometimes reaches almost to the rub rail/gunnel? If so, you have a serious, serious issue! Link to comment Share on other sites More sharing options...
Nolezone Posted April 27, 2018 Author Report Share Posted April 27, 2018 My bilge pump outlet is NOT just below the rub rail (it’s about half the way from the bottom of the side and rub rail) and dips at times down below the waterline. I’m sure the weight of the 150hp outboard is a factor. Boat’s only 10 years old and I can’t imagine the through hulls need replacing or resetting. Guess I better call Hewes directly. Link to comment Share on other sites More sharing options...
smilemaker Posted April 27, 2018 Report Share Posted April 27, 2018 The hose to the bilge pump should have a loop on it that goes as high as possible inside the boat as it then comes down to the outlet. This will stop water from pouring directly into the pump. It must first go into the hose and up to the highest point before it can run down into the boat at the pump. If the hose runs straight to the pump then water has a straight shot. Link to comment Share on other sites More sharing options...
Nolezone Posted April 27, 2018 Author Report Share Posted April 27, 2018 Thanks, I will check the position of the hose. There’s a lot going on in my rear starboard hatch (battery, hydraulic pumps, water/fuel separator, etc.) and it might have been dislodged somehow. That would certainly be a cheap fix! Link to comment Share on other sites More sharing options...
Nolezone Posted April 28, 2018 Author Report Share Posted April 28, 2018 Note position of bilge outlet Link to comment Share on other sites More sharing options...
JEM Posted April 28, 2018 Report Share Posted April 28, 2018 Hmmmm. There must be a reason why MBG positioned the thru hull so low. Looks like your best hope is that there is no loop in the hose so that you can put a loop back in. Just curious.......is the boat rated for a 150? Link to comment Share on other sites More sharing options...
Nolezone Posted April 29, 2018 Author Report Share Posted April 29, 2018 Yes, max rating 150hp. May ask MBG for their thoughts. Link to comment Share on other sites More sharing options...
justfish Posted April 29, 2018 Report Share Posted April 29, 2018 It does seem lower than I’ve seen but not low enough that it should be gong under that often But have you checked the seal around the cockpit scuppers? Most of the time it seems to be the sealant around the pipe that goes from cockpit to hull is dried up. It was allowing a surprising amount of water into mine (since they are indeed under a lot) and I couldn’t even see an issue. Link to comment Share on other sites More sharing options...
Nolezone Posted April 29, 2018 Author Report Share Posted April 29, 2018 I will check the integrity of the cockpit scupper seals, thx. Link to comment Share on other sites More sharing options...
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